Materials Engineer Reviewer

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[email protected] To GOD be the glory!!!

1

MATERIALS

ENGINEER

ACCREDITATION

EXAMINATION

REVIEWER

PREPARED BY:

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2

SCHEDULE OF

MINIMUM TEST

REQUIREMENTS

(FREQUENCY)

Schedule of Minimum Testing Requirements Governing Items of Work of the DPWH Specifications for Highways, Bridges and Airports (2004 Edition)

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3 PART C - EARTHWORKS

ITEM 100 – CLEARING AND GRUBBING

* This item shall consist of clearing, grubbing, removing and disposing all vegetation and debris as designated in the contract.

Tests: None

ITEM 101 – REMOVAL OF STRUCTURES AND OBSTRUCTIONS

*This item shall consist of the removal wholly or in part, and satisfactory disposal of all buildings, fences, structures, old pavements abandoned pipelines, and any other obstruction which are not designated or permitted to remain.

Tests: None ITEM 102 – EXCAVATION

* This item shall consist of roadway, drainage and borrow excavation and the disposal of materials.

Tests: Same as for Items 103, 104 and 105, whichever is applicable ITEM 103 – STRUCTURE EXCAVATION

* This item shall consist of the necessary excavation for foundation of bridges, culverts, under-drains, and other structures not otherwise provided in the specifications.

If the excavated materials are washed, the volume involved shall be reported so that quality control requirements may be adjusted accordingly (submit Project Engineer Certificate of Waste).

If the excavated materials are incorporated into the work: Tests:

For every 1,500 m3 or fraction thereof: 1 – G, Grading Test

1 – P, Plasticity Test (LL, PL, PI) 1 – C, Laboratory Compaction Test For every 150 mm in uncompacted depth: 1 – D, Field Density

ITEM 104 – EMBANKMENT

* This item shall consist of the construction of embankment.

Tests:

For every 1,500m3 or fraction thereof: 1 – G, Grading Test

1 – P, Plasticity Test (LL, PL, PI) 1 – C, Laboratory Compaction Test

For each 500m2 of each layer of compacted fill or fraction thereof: At least one group of three in – situ density test. The layer shall be placed not exceeding200 mm in loose measurement or based on the result of compacted trials.

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4 ITEM 105 – SUBGRADE PREPARATION

* This item shall consist of the preparation of the sub-grade for the support of overlying structural layers.

Tests: Same as for Item 104

ITEM 106 – COMPACTION EQUIPMENT AND DENSITY CONTROL STRIPS

* This item shall be used in determining the density requirements of selected embankments, sub-grade, bases and bituminous concrete.

Tests: Same as for Items104, 105, 200, 201, 202, 203, 204, 205, 206 and 300

ITEM 107 – OVERHAUL

* This item shall consist of authorized hauling in excess of free-haul distance.

Tests: None

PART D – SUB - BASE AND BASE COURSE

ITEM 200 – AGGREGATE SUBBASE COURSE

* This item shall consist of furnishing, placing and compaction of aggregate sub-base course on a prepared sub-grade.

Tests:

For every 300 m3 or fraction thereof: 1 – G, Grading Test

1 – P, Plasticity Test (LL, PL, PI) For every 1,500 m3 or fraction thereof: 1 – C, Laboratory Compaction Test

1 – Q, Quality Test (Grading, Plasticity and Abrasion) For every 2,500m3 or fraction thereof:

1 – CBR, California Bearing Test

For every layer of 150 mm of compacted depth based on the result of compaction test trials:

At least one group of three in – situ density tests for each 500 m2 or fraction thereof

ITEM 201 – AGGREGATE BASE COURSE

* This item shall consist of furnishing, placing, and compaction of aggregate base course on a prepared sub-grade.

Tests:

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5 For every 2,500m3 or fraction thereof:

1 – CBR, California Bearing Test

ITEM 202 – CRUSHED AGGREGATE BASE COURSE

* This item shall consist of furnishing, placing, and compacting crushed gravel, crushed stone or crush rock on a prepared sub-grade.

Tests:

Same as for Item 201

For every 1,500m3 or fraction thereof: 1 – F, Fractured face

ITEM 203 – LIME STABILIZED ROAD MIX BASE COURSE

* This item shall consist of a foundation for surface course composed of soil aggregate, lime and water in proper proportions.

Amount of lime to be added:

3 – 12 mass percent of dry soil aggregates test Tests:

A. SOIL AGGREGATE

1 – P, Plasticity Test (LL, PL, PI) For every1,500 m3 or fraction thereof:

1 – Q, Quality Test (Grading, Plasticity and Abrasion) B. MIX

For every 300 m3 or fraction thereof: 1 – C, Laboratory Compaction Test 1 – UC, Unconfined Compaction Test C. COMPACTED BASE COURSE

For every layer of 150 mm compacted depth:

1 – D, Field Density Test for every 150 m or fraction thereof 1 – T, Thickness determination fro every 150 m or fraction

thereof

D. HYDRATED LIME

For every 100T or fraction thereof: 1 – Q, Quality Test

ITEM 204 – PORTLAND CEMENT STABILIZED ROAD MIX BASE COURSE

* This item shall consist of a foundation for surface course, composed of soil aggregate, Portland cement and water in proper proportions.

Amount of cement to be added: 6 to 10 mass of dry soil aggregate Tests:

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6 A. SOIL AGGREGATE

Same as for Item 203 B. CEMENT

1 – Q, Quality Test for every 2,000 bags or fraction thereof C. WATER

1 – Q, Quality Test/Project Engineer’s Certificate D. MIX

For every 300 m3 or fraction thereof: 1 – C, Laboratory Compaction Test 1 – UC, Unconfined Compaction Test 1 – CBR, California Bearing Ratio E. COMPACTED BASE COURSE

1 – D, Field Density Test for every 150 m or fraction thereof 1 – T, Thickness Determination for every 150 m or fraction

thereof

ITEM 205 – ASPHALT STABILIZED ROAD MIX BASE COURSE

* This item shall consist of a foundation for surface course, composed of soil aggregate and asphaltic material in proper proportions.

Amount of asphalt to be added: 4 – 7 mass of dry soil aggregate Tests:

A. SOIL AGGREGATE Same as for Item 203 B. EMULSIFIED ASPHALT

1 – Q, Quality Test for every 40T of 200 drums or fraction thereof

C. MIX

C. COMPACTED BASE COURSE Same as for Item 203

ITEM 206 – PORTLAND CEMENT STABILIZED TREATED PLANT MIX BASE COURSE

* This item shall consist of a foundation for surface course composed of aggregate Portland cement and water in proper proportion.

Amount of cement to be added: 6 to 10 mass of dry soil aggregate Tests:

A. SOIL AGGREGATE Same as for Item 203 B. PORTLAND CEMENT

For every 2,000 bags or fraction thereof: 1 – Q, Quality Test

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7 Same as for Item 204

D. WATER

1 – Q, Quality Test/Project Engineer’s Certificate E. COMPACTED BASE COURSE

1 – D, Field Density Test for every 150 m or fraction thereof 1 – T, Thickness Determination for every 150 m or fraction

thereof

ITEM 207 – AGGREGATE STOCKPILE

* This item shall furnishing and placing aggregate in stockpiles at locations.

Tests:

Same as the specified Item No. of the Specification PART E – SURFACE COURSES

ITEM 300 – AGGREGATE SURFACE COURSE

* This item shall consist of wearing of top course composed of gravel or crushed aggregate and other binder material.

Tests:

1 – Q, Quality Test (Grading, Plasticity and Abrasion)

For crushed gravel or crushed stone 1,500 m3 or fraction thereof: 1 – F, Fractured face

ITEM 301 – BITUMINOUS PRIME COAT

* This item shall consist of preparing and treating an aggregate base course.

Quantity:

1 to 2 L/m2 Test:

1 – Q, Quality Test for every 40T or 200 drums ITEM 302 – BITUMINOUS TACKCOAT

* This item shall consist of preparing and treating an existing bituminous or cement concrete with bituminous material.

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8 0.2 to 0.7 L/m2

Test:

1 – Q, Quality Test for every 40T or 200 drums ITEM 303 – BITUMINOUS SEAL COAT

* This item shall consist of an application of bituminous material with or w/o an application of aggregate on an existing bituminous surface course.

A. BITUMINOUS MATERIALS Quantity:

0.2 to 1.5 L/m2

Test:

1 – Q, Quality Test for every 40T or 200 drums B. COVER AGGREGATES

Quantity:

5 to 14 kg/m2 Test:

For every 75 m3/200 kg or fraction thereof: 1 – G, Grading Test

ITEM 304 – BITUMINOUS SURFACE TREATMENT

* This item shall consist of either a single application of bituminous materials followed by a single spreading of aggregate (single surface treatment) or two applications bituminous material each followed.

A. AGGREGATES Quantity:

13.6 to 38 kg/m2 if using cut – back asphalt or asphalt cement 13.6 to 19.04 kg/m2 if using emulsified asphalt

Tests:

For every 75 m3/200 kg or fraction thereof: 1 – G, Grading Test

1 – P, Plasticity Test (LL, PI)

For every 1,500 m3 or fraction thereof:

1 – Q, Quality Test (Grading, Plasticity and Abrasion) For every 1,500m3 or fraction thereof:

1 – F, Fractured Face B. BITUMINOUS MATERIALS Quantity:

1.58 to 2.04 L/m2 if using cut – back asphalt or asphalt cement 1.58 to 2.04 L/m2 if using emulsified asphalt

ITEM 305 – BITUMINOUS PENETRATION MACADAM PAVEMENT

* This item shall consist of furnishing and placing one or more aggregate and one or more application of bituminous material followed by a seal coat a with cover aggregate constructed on a prepared base.

A. AGGREGATES Quantity:

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9 Using Asphalt Cement or Rapid Curing Emulsified Asphalt

Course (crushed) 80 kg/m2 Key (crushed) 24 kg/m2 Cover (crushed or screened) 8 kg/m2 B. BITUMINOUS MATERIALS

Quantity:

7.2 to 11 L/m2 Test:

ITEM 306 – BITUMINOUS ROAD MIX SURFACE COURSE

* This item shall consist of constructing a bituminous road mix surface course on a prepared base.

A. AGGREGATES Tests:

Same as for Item 304 B. BITUMINOUS MATERIALS

Quantity:

Using cut – back asphalt – 4.5 to 7 mass % of total dry aggregate Using emulsified asphalt – 6 to 10 mass % of total dry aggregate Tests:

Same as for Item 301 C. MIX

Tests:

For every 75 m3/130T or fraction thereof: 1 – G, Grading Test

1 – Ext, Stability Test

1 – C, Laboratory Compaction Test D. HYDRATED LIME

Tests:

E. COMPACTED PAVEMENT Tests:

For each full day’s operation:

D & T (Density & Thickness Test), at least one (1) but not more than three (3) samples shall be taken

ITEM 307 – BITUMINOUS PLANT – MIX SURFACE COURSE – GENERAL

* This item includes general requirements that are applicable to all type of bituminous surface courses irrespective of gradation of aggregate or kind and amount of bituminous material.

A. AGGREGATE Tests:

For every 75 m3/200T or fraction thereof: 1 – G & P, Grading & Plasticity Tests

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10 For every 1,500m3 or fraction thereof:

1 – Q, Quality Test (Grading, Plasticity and Abrasion, Stripping and Bulk specific gravity)

1 – F, Fractured face B. BITUMINOUS MATERIALS

Quantity:

5 to 8 mass percent of total dry aggregates Tests:

1 – Q, Quality Test for each 40T or 200 drums or fraction thereof C. MIX

Tests:

For every 75 m3/130T or fraction thereof: 1 – G. Grading Test

1 – Ext, Stability Test

1 – C, Laboratory Compaction Test D. HYDRATED LIME

Tests:

E. MINERAL FILLER Tests:

For every 75 m3 or fraction thereof:

1 – G & P, Grading & Plasticity Tests (LL, PL, PI) F. COMPACTED PAVEMENT

Tests:

For each full day’s operation:

D & T (Density & Thickness Test), at least one (1) but not more than three (3) samples shall be taken

ITEM 308 – BITUMINOUS PLANT – MIX SURFACE COURSE – COLD LAID

* This item shall consist of constructing Bituminous Surface Course (Asphalt Cold Mix) prepared in central mixing plant, laid cold on a prepared base.

A.AGGREGATE Tests:

Same as for Item 307 B. BITUMINOUS MATERIALS Quantity:

Using cut – back asphalt -- 4.5 to 7 mass % of total dry aggregate Using emulsified asphalt – 6 to 10 mass % of total dry aggregate Tests:

1 – Q, Quality Test for each 40T or 200 drums fraction thereof C. MIX

Tests:

Same as for Item 307 D. HYDRATED LIME

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E. MINERAL FILLER Tests:

For every 75 m3 or fraction thereof:

1 – G & P, Grading & Plasticity Tests (LL, PL, PI) F. COMPACTED PAVEMENT

Tests:

ITEM 309 – BITUMINOUS PLANT – MIX (STOCKPILE MAINTENANCE MIXTURE)

* This item shall consist of a bituminous stockpile maintenance mixture composed of aggregate, mineral filler, hydrated lime and bituminous material mixed in a central plant.

A. AGGREGATE Tests:

4 to 10 mass percent of total mix Tests:

Tests:

Same as for Item 307 E. MINERAL FILLER

Tests:

Same as for Item 307 F. COMPACTED PAVEMENT Tests:

ITEM 310 – BITUMINOUS CONCRETE SURFACE COURSE – HOT LAID

* This item shall consist of constructing a bituminous concrete surface course composed of aggregate, mineral filler and bituminous material mixed in a central plant, constructed and laid hot on prepared base.

A. AGGREGATES Tests:

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12 Tests:

Tests:

Same as for Item 307 E. MINERAL FILLER

Tests:

Same as for Item 307 F. COMPACTED PAVEMENT Tests:

ITEM 311 – PORTLAND CEMENT CONCRETE PAVEMENT

* This item shall consist of pavement of Portland cement concrete, with or without reinforcement, constructed on the prepared base.

A. CEMENT Quantity:

9.0 bags/m3 (40 kg/bag) Test:

B. FINE AGGREGATE Quantity:

0.50 m2/m3 concrete if using rounded course aggregate 0.54 m2/m3 concrete if using angular or crushed coarse aggregate

Tests:

a.) For a source not yet tested or failed in previous quality test: 1 – Q, Quality Test (Grading, Elutriation – wash, Bulk Specific Gravity, Absorption, Mortar Strength, Soundness, Organic Impurities, Unit Weight, % clay lumps and % shale)

b.) For a source previously tested and passed quality test:

1 – Q, Quality Test (Grading, Elutriation – wash, Bulk Specific Gravity, Absorption, Mortar Strength)

C. COURSE AGGREGATE Quantity:

0.77 m2/m3 concrete if using rounded coarse aggregate 0.68 m2/m3 concrete if using angular or crushed coarse aggregate

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13 For every 1,500 m3 or fraction thereof:

a.) For a source not yet tested or failed in previous quality test: 1 – Q, Quality Test (Grading, Bulk Specific Gravity, Absorption, Abrasion, Soundness and Unit Weight)

1 – Q, Quality Test (Grading, Bulk Specific Gravity, Absorption and Abrasion)

D. WATER Test:

1 – Certificate from Project Engineer or 1 – Q, Quality Test if source is questionable

E. JOINT FILLER

1. Poured joint filler Test:

1 – Q, Quality Test on each type of ingredient for each shipment

2. Pre – molded joint filler Test:

1 – Q, Quality Test on each thickness of filler for each shipment

F. SPECIAL CURING AGENTS Test:

1 – Q, Quality Test for each shipment G. STEEL BARS

Test:

For every 10,000 kg or fraction thereof for each size:

1 – Q, Quality Test (Bending, Tension and Quality Analysis) H. CONCRETE

Test:

Flexural Strength Test on concrete beam samples:

1 – Set consisting of 3 beam samples shall represent a 330 m2 of pavement, 230 mm depth or fraction thereof placed each day Volume of concrete not more than 75 m3

I. COMPLETED PAVEMENT Test:

Thickness determination by concrete core drilling on a lot basis Five (5) holes per km per lane or five (5) holes per 500 m when two (2) lanes are poured concurrently

PART F – BRIDGE CONSTRUCTION ITEM 400 - PILING

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14

* This item shall consist of piling, furnished, driven or placed, cut and spliced.

A. TIMBER PILES Test:

1 – Inspection Report for each size and shipment of timber B. CONCRETE PILES

a.) Concrete

Test: Same as for Item 405 b.) Reinforcing Steel

Test: Same as for Item 404 C. STRUCTURAL PILES

Tests:

1 – IR, inspection Report

1 – Q, Quality Test or Mill Test Certificate ITEM 401 – RAILINGS

* This item shall consist of furnishing, fabricating or placing, for bridges and other structures of the material of combination of materials.

A. CONCRETE Test:

Same as for Item 405, Class C B. REINFORCING STEEL

Test:

Same as for Item 404 ITEM 402 – TIMBER STRUCTURES

* This item shall consist of construction of timber structures to the dimensions, lines and grades as shown on the plans.

Tests:

1 – Q, Quality Test or Manufacturer’s Certificate for each type of material used

1 – IR, Inspection Report for each type and shipment of timber ITEM 403 – METAL STRUCTURES

* This work shall consist of steel structures portions of composite structures, constructed in reasonably close conformity with the lines, grades and dimension.

Tests:

1 – Q, Quality Test or Manufacturer’s Certificate for each type of material used

1 – IR, Inspection Report for each type and shipment of metal ITEM 404 – REINFORCING STEEL

* This item shall consist of furnishing, bending, fabricating and placing of steel reinforcement of the type, size, shape and grade required.

A. BAR REINFORCEMENT FOR CONCRETE Test:

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15 1 – Q, Quality Test (Bending, Tension and Quality Analysis) B. WIRE AND WIRE MESH

Test:

1 – Q, Quality Test ITEM 405 – STRUCTURAL CONCRETE

* This item shall consist of furnishing, bending, and placing and finishing concrete in all structures except pavements.

A. CEMENT

Quantity: (40 kg/bag)

Class A 9 bags/m3 of concrete – 3,000 psi/20.7 MPa Class B 8 bags/m3 of concrete – 2,400 psi/16.4 MPa Class C 9.5 bags/m3 of concrete – 3,000 psi/20.7 MPa Class B 11 bags/m3 of concrete – 5,000 psi/20.7 MPa Class Seal 9.5 bags/m3 of concrete – 3,000 psi/20.7 MPa Test:

For every 2,000 bags or fraction thereof: 1 –Q, Quality Test B. FINE AGGREGATES Quantity: ROUNDED ANGULAR/CRUSHED Class A 0.50 0.54 m2/m3 of concrete Class B 0.45 0.52 m2/m3 of concrete Class C 0.53 0.59 m2/m3 of concrete Class P 0.44 0.47 m2/m3 of concrete Test:

a.) For a source not yet tested or failed in previous quality test: 1 – Q, Quality Test (Grading, Elutriation – wash, Bulk Specific Gravity, Absorption, Mortar Strength, Soundness, Organic Impurities, Unit Weight, % clay lumps and % shale)

1 – Q, Quality Test (Grading, Elutriation – wash, Bulk Specific Gravity, Absorption, Mortar Strength)

For every 75 m3 or fraction thereof: 1 – G, Grading Test C. COARSE AGGREGATES Quantity: ROUNDED ANGULAR/CRUSHED Class A 0.77 0.68 m2/m3 of concrete Class B 0.82 0.73 m2/m3 of concrete Class C 0.70 0.66 m2/m3 of concrete Class P 0.56 0.65 m2/m3 of concrete Test:

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16 For every 1,500 m3 or fraction thereof:

a.) For a source not yet tested or failed in previous quality test: 1 – Q, Quality Test (Grading, Bulk Specific Gravity, Absorption, Abrasion, Soundness and Unit Weight)

1 – Q, Quality Test (Grading, Bulk Specific Gravity, Absorption and Abrasion)

D. WATER Tests:

E. PRE – MOLDED FILLER FRO EXPANSION JOINTS Test:

1 – Q, Quality Test on each thickness of filler for each shipment F. STEEL REINFORCEMENT

Test:

For every 10,000 kg or fraction thereof for each size:

1 – Q, Quality Test (Bending, Tension and Quality Analysis) G. CONCRETE

Tests:

Compressive Strength Test on concrete cylinder samples, one (1) set consisting three (3) concrete cylinder samples shall be taken from each day’s pouring and to represent not more than 75 m3 of concrete or fraction thereof

ITEM 406 – PRE – STRESSED CONCRETE STRUCTURES

* This item shall consist of pre-stressed concrete structures and the pre-stressed concrete portions of composite structures.

A. CONCRETE Tests:

Same as for Item 405, Class P B. STEEL REINFORCEMENT

Test:

Same as for Item 404 C. WIRE STRAND

Test:

1 – Q, Quality Test for every 20T or fraction thereof ITEM 407 – CONCRETE STRUCTURES

*This item shall consist of the general description of the materials, equipment, workmanship and construction requirements of concrete structures and the concrete portions of composite structures.

Tests:

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17 Elastometric Bearing Pads will be tested to determine its quality ITEM 408 – STEEL BRIDGES

* This item shall consist of construction of steel structure conforming to the lines, grades, dimension and designs.

Tests:

Same as for Item 403 and 411 Painting:

1 – Q, One 20 – L can for every 100 cans or fraction thereof 1 – Q, One 4 – L can for every 100 cans or fraction thereof

ITEM 409 – WELDED STRUCTURAL STEEL

* This work shall consist of the joining of structural steel members with welds of the type.

Test:

Same as for 403 and Inspection Report ITEM 410 – TREATED AND UNTREATED TIMBER

* This item shall consist of structural timber of the specie size called on the plans either treated or untreated as called for in the proposal.

Test:

1 – IR, Inspection report

1 – Q, Quality Test for preservatives ITEM 411 – PAINT

* This item shall consist of furnishing and applying all paint materials including vehicles, pigments, pastes, dryers, thinners, and mixed paints for steel and wooden structures.

Test:

1 – Q, One 20 – L can for every 100 cans or fraction thereof 1 – Q, One 4 – L can for every 100 cans or fraction thereof ITEM 412 – ELASTOMETRIC BEARING PADS

*This item shall consist of the requirement for elastomeric bearing pads whose main function is to transfer loads or accommodate relative movement between a bridge superstructure and its supporting structures

ITEM 413 – PRE – MOLDED JOINT FILLER FOR CONCRETE PAVING AND STRUCTURAL CONCRETE

* Preformed sponge rubber and rock expansion joint filler for concrete paving and

structural construction.

PART G – DRAINAGE AND SLOPE PROTECTION STRUCTURES

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* This item shall consist of the construction or reconstruction of pipe culverts and storm

drains.

A. PIPES Test:

1 – Q, Quality Test for one (1) pipe for every 50 pieces (Strength, Absorption and Dimension)

Alternative Requirements:

1. Compressive Strength for one (1) set consisting of three (3) concrete cylinder samples for not more than twenty – five (25) pipe cast in the field

2. Inspection Report for each size for not more than twenty – five (25) pipes cast in the field

B. MORTAR AND JOINT FILLER Cement, fine aggregates and water: Test:

Same as for Item 405 ITEM 501 – UNDERDRAINS

* This item shall consist of constructing under drains, using pipe and granular filter materials, under drain pipe outlets, and blind drain using granular materials.

A. CONCRETE PIPE (NON – REINFORCED) Test:

Quality Test for 0.5% of the number of pipes for each size but not less than two (2) for Strength, Absorption and Dimension

Alternative requirements:

1. Compressive Strength for one (1) set consisting of three (3) concrete cylinder samples for not more than twenty – five (25) pipe cast in the field

2. Inspection Report for each size for not more than twenty – five (25) pipes cast in the field

B. CLAY PIPE Test:

Quality Test for one (1) pipe for every 200 pieces of each size, with a minimum number of two (2) specimens for Strength, Absorption and Dimension

ITEM 502 – MANHOLES, INLETS AND CATCHBASINS

* This item shall consist of the construction, reconstruction or adjustment of manholes, inlets, and catch basins.

A. CONCRETE Test:

Same as for Item 405, Class A B. LIDS, CAST IRON FRAMES AND GRATING Test:

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19 ITEM 503 – DRAINAGE STEEL GRATING WITH FRAME

* The steel frame clear openings of drainage grates shall be 15 mm larger than nominal sizes of industry standard sized pits.

ITEM 504 – CLEANING AND RECONDITIONING OF EXISTING DRAINAGE STRUCTURES

* This item shall consist of cleaning and reconditioning existing pipes and appurtenant structures.

Test:

Inspection Report

ITEM 505 – RIPRAP AND GROUTED RIPRAP

* This item shall consist of the furnishing and placing riprap with or without grout as the case maybe, with or without filter backing.

Test:

(Cement – Aggregate ratio = 1:3) ITEM 506 – STONE MASONRY

* This item shall consist of stone masonry of minor structures, in headwalls for culverts, in retaining walls at the toes of slopes.

A. CEMENT Quantity:

2 bags/m3 of concrete Test:

(Cement – Aggregate ratio = 1:2) B. FINE AGGREGATE

Quantity:

0.17 m2/m3 of concrete Test:

For every 1,500 m3 or fraction thereof: 1 – Q, Quality Test (same as for Item 405) For every 75 m3 or fraction thereof:

1 – G, Grading Test C. STONE Test: Inspection Report D. WATER Test:

ITEM 507 – RUBBLE CONCRETE

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20 ITEM 508 – HAND – LAID ROCK EMBANKMENT

* This item shall consist of hand-laid rock embankment.

Test:

Inspection Report ITEM 509 – SHEET PILES

* This item shall consist of furnishing, driving cutting off of sheet pile.

A. TIMBER SHEET PILES Test:

Inspection Report B. CONCRETE SHEET PILES Test:

Same as for Item 400 C. STEEL SHEET PILES

Test:

ITEM 510 – CONCRETE SLOPE PROTECTION

* This item shall consist of furnishing and placing of concrete slope protection including all necessary excavation, a bed course and reinforced concrete to the required thickness and extent to protect slope against erosion.

A. BED COURSE Test:

Same as for Item 200 B. STEEL REINFORCEMENT Test:

Same as for Item 404 C. CONCRETE

Test:

Same as for Item 405 ITEM 511 – GABIONS

* This item shall consist of furnishing, forming wire mesh baskets, and placing rocks installed at the location designated.

Test:

1 – Q, Quality Test for each shipment

PART H – MISCELLANEOUS STRUCTURES

ITEM 600 – CURB AND GUTTER

* This item shall construction of curb and gutter either pre-cast of cast - in place made of concrete.

A. CONCRETE Quantity:

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21 0.078 m3/m (curb only)

0.092 m3/m (curb and gutter, Type A) 0.145 m3/m (curb and gutter, Type B) 0.074 m3/m (curb and gutter, Type C) Test:

Same as for Item 405 B. JOINT FILLER

Test:

Same as for Item 311 ITEM 601 – SIDEWALK

* This item shall consist of construction of asphalt of Portland cement concrete sidewalk.

A. CONCRETE Test:

Same as for Item 405, Class A B. PRE – MOLDED EXPANSION JOINT FILLER Test:

ITEM 602 – MONUMENTS, MARKERS AND GUIDE POSTS

* This item shall consist of right-of-way monuments, maintenance marker posts, kilometer posts and/ or guideposts.

A. CONCRETE Test:

Same as for Item 405, Class A B. REINFORCING STEEL

Test:

Same as for Item 404 C. TIMBER

Test:

Same as for Item 410 D. PAINT

Test:

Same as for Item 411 ITEM 603 – GUARDRAIL

* This item shall consist of furnishing and constructing posts and guardrails.

A. STEEL POSTS Test:

Same as for Item 403 B. TIMBER POSTS

Test:

Same as for Item 410 C. CONCRETE

Test:

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22 D. REINFORCING STEEL

Test:

Same as for Item 404 E. RAIL

Test:

Inspection Report F. PAINT

Test:

Same as for Item 411 ITEM 604 – FENCING

* This item shall consist of furnishing and constructing of post and barb wire or chain link fences.

A. BARB WIRE, CHAIN LINK FABRIC Test:

1 – Q, Quality Test B. CONCRETE POSTS

Test:

Same as for Item 405 C. STEEL REINFORCEMENT Test:

Same as for Item 404 ITEM 605 – ROAD SIGN

* This item shall consist of furnishing and installing road signs.

Test:

Inspection Report ITEM 606 – PAVEMENT MARKINGS

* This item shall consist of placing markings of the finished pavement.

Test:

ITEM 607 – REFLECTIVE PAVEMENT STUDS

* This item shall consist of furnishing and installing reflective pavement studs on the surface of the pavement.

Test:

Inspection Report ITEM 608 – TOPSOIL

* This consists of topsoil furnished, transported and spread, or topsoil removed from designated areas, haul and spread.

Test:

Inspection Report ITEM 609 – SPRIGGING

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* This item consists of planting sprigs of living grass plants.

Test:

Inspection Report ITEM 610 – SODDING

* This item shall consist of furnishing and laying of live sod on the shoulders, slopes, ditches, or other locations as designated, construction of sod ditch checks or similar appurtenances.

Test:

Inspection Report ITEM 611 – TREE PLANTING

* This item shall consist of furnishing and planting deciduous shade, flowering trees evergreen trees less than 150 mm diameter on the areas.

Test:

Inspection Report

ITEM 612 – REFLECTIVE THERMOPLASTIC STRIPPING

* This item shall be applied to the road surface in a molten state by mechanical means

with surface application glass beads at a rate not less than 350g/L.

PART I – MATERIALS DETAILS

ITEM 700 – HYDRATED CEMENT Test:

ITEM 701 – CONSTRUCTION LIME (HYDRATED) Test:

1 – Q, Quality Test for every 100T or fraction thereof ITEM 702 – BITUMINOUS MATERIALS

Test:

Same as for Items 301, 302, 303, 306, 307, 308, 309 and 310 ITEM 703 – AGGREGATES

Test:

Same as for item of work in the Bill of Quantities ITEM 703A – MINERAL FILLER

* This item shall consist of finely divided material mineral matter such as rock dust, slug dust, hydrated lime, hydraulic cement, fly ash or other suitable mineral matter.

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ITEM 704 – MASONRY UNITS Test:

1 – Q, Quality Test for every 10,000 units or fraction thereof ITEM 705 – JOINT MATERIALS

Test:

Same as for Items 311 and 500

ITEM 706 – CONCRETE, CLAY, PLASTIC AND FIBER PIPES A. CONCRETE

Test:

Same as for Item 500 B. CLAY AND OTHER TYPE OF PIPES Test:

Refer to applicable requirements of AASHTO Test and Specs ITEM 707 – METAL PIPE

Test:

ITEM 708 – CONCRETE CURING MATERIALS AND ADMIXTURE

* This item specifies the classification, sampling, testing, packing and marking of concrete admixtures.

Test:

1 – Q, Quality Test for each shipment ITEM 709 – PAINTS

Test:

ITEM 710 – REINFORCING STEEL AND WIRE ROPE A. REINFORCING STEEL

Test:

Same as for Item 404 B.WIRE ROPE

Test:

Same as for Item 406 ITEM 711 – FENCE AND GUARDRAIL

A. FENCE Test:

Same as for Item 604 B. GUARDRAIL

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ITEM 712 – STRUCTURAL METAL Test:

Same as for Items 403 and 406 ITEM 713 – TREATED AND UNTREATED TIMBER

Test:

Same as for Item 410 ITEM 714 – WATER

Test:

Certificate from Project Engineer or 1 – Q, Quality Test, if source is questionable

ITEM 715 – GEOTEXTILES

* This item covers geotextiles fabric for use in subsurface drainage, hydraulic filter,

erosion control, sediment control, pavement superstructures as a water proofing and stress relieving membrane, and as permeable separator to prevent mixing of dissimilar materials.

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26

TABLES

MINIMUM REQUIREMENTS FOR SUBMISSION OF SAMPLES

MATERIALS MNIMUM TESTING

REQUIREMENTS

MINIMUM

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27 MATERIALS FOR EACH

SAMPLE SUBMITTED

1. Cement 1 sample per 2000 bags 10 kg

2. Asphaltic material 1 sample per 40T or 200 _drums 5L

3. Aspahlt mix 1 sample per 130T 20 kg

4. Aggregates a. coarse aggregate b. fine aggregate 1 sample per 1,500 m3 70 kg 50 kg 5. Soil aggregates a. Classification b. Routinary tests c. MDR test and CBR 1 sample per 1,500 m3 20 kg 50 kg 50 kg 6. Non – Reinforced Concrete

Pipes 2 pipes min./0.5% of no. of pipes 2 pipes 7. Reinforced Concrete Pipes 1 sample per 50 pipes or _{2% of # of pipes} 1 pipe (1 m length) 8.Steel pipe (galvanized) 1 sample per 500 lengths 2 pcs Of 100 mm long taken _{from both ends w/ thread} 9. Concrete hollow blocks (CHB)

a. strength

b. moisture content

1 sample per 10,000 units

3 units 3 units

10. Steel bar 1 sample per 10T 1 m

11. Steel sheet (galvanized) 1 sample per 100 sheets 3 pcs 60mm x 60mm

12. Wire strand 1 sample per 20T 2 m

13. Gabion 1m x 2m

14. Paints 1 sample per 100 cans 1 - 4L can

15. Joint – filler (pre – molded) 1 – 400mm x 400mm

16. Curing compound 1L

17. Concrete cylinder 1 sample per 75 m3 1 set (3 cylinders) 18. Concrete beam 1 sample per 75 m3 or 1

day pouring 1 set (3 cylinders) 19. Concrete core 5 holes for every km/lane

20. Asphalt core 1 core for every 100m 21. Water

a. Chemical analysis b. Sediment load analysis

500 ml 500 ml

22. Structural steel/sheet 1 sample per 50T Reduced section as prescribed 23. Hydrated lime 1 sample per 100T

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28 Class of concrete Minimum cement content per cu. m kg (bags) Maximum water – cement ratio kg/kg Consistency range in slump mm (inch) Designated size of coarse aggregate square opening – std. mm Minimum compressive strength of 150mm x 300mm concrete cylinder @ 28 days MN/m2 (psi) A 360 (9) 0.53 50 -100 (2 – 4) 37. 5 – 4.75 (1 ½ - No. 4) 20.7 (3000) B 320 (8.5) 0.58 50 -100 (2 – 4) 50.0 – 4.75 (2 - No. 4) 16.5 (2400) C 380 (9.5) 0.55 50 -100 (2 – ₄₎ 12. 5 – 4.75 _{(½ - No. 4)} 20.7 (3000) P 440 (11) 0.49 100 max ( 4 _max) _{(3/4 - No. 4)}19.0 – 4.75 37. 7 (5000) Seal 380 (9.5) 0.58 100 – 200 (4 _{– 8)} 25.0 – 4.75 _{(1 - No. 4)} 20.7 (3000)

PAYMENT ADJUSTMENT FOR PAVEMENT WITH DEFICIENCY IN STRENGTH

Deficiency in strength of concrete pavement Percent (%) Percent (%) of contract price allowed Less than 5 100 5 to less than 10 80 10 to less than 15 70 15 to less than 20 60 20 to less than 25 50 25 or more 0

PAYMENT ADJUSTMENT FOR PAVEMENT WITH DEFICIENCY IN THICKNESS

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29 Deficiency in the average thickness per lot(mm) Percent (%) of contract price per lot 0 – 5 100 6 – 10 95 11 – 15 85 16 – 20 70 21 – 25 50

more than 25 removed and replaced (no payment)

COMMON LABORATORY TESTS

Kind of material Type of test Test duration per sample (min. # of days)

Cement Physical and chemical 8

Coarse aggregate Grading 3

Specific gravity 3

Absorption 3

Abrasion 1

Unit weight 1

Fine aggregate Grading 3

Specific gravity 3

Absorption 3

Unit weight 1

Soil aggregates mixture (subbase, base and surfaces

courses Grading 3 Liquid limit 3 Plastic limit 3 Compaction 3 CBR 7 Abrasion 1 Asphalt Physical 4

Paint Physical and chemical 4

Concrete cylinder Compressive 1

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30

Concrete core Cutting of sample 1

LIMITATIONS/VARIATIONS ITEM 104 ITEM 105 ITEM 200 1TEM 201 ITEM 202 ITEM 203 ITEM 300 Abrasion loss 50% max 50% max 45% max 45% max Plastic index 6% max 12% max 6% max 6% max 4% to 10% 4% to 9% Liquid limit 30%

max 35% max 25% max 25% max 35% max Permitted variation from design THICKNESS OF LAYER ±20mm ±10mm +15mm, -5mm Permitted variation from design LEVEL OF SURFACE +20mm, -30mm +10mm, -20mm -5mm, -10mm +15mm, -5mm Permitted surface irregularity measured by 3-m straight edge 30mm 20mm 5mm 5mm Permitted variation from design cross fall or camber ±0.5% ±0.3% ±0.2% +0.2% Permitted variation from design longitudinal grade over 25m length ±0.1% ±0.1% ±0.1% +0.1% California Bearing Ratio 25% min 80% min 80% min 100% 80% min DIMESION OF PILES

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31

minimum maximum tip Ø

less than 12m 300mm 450mm 200mm

12m to 18m 320mm 450mm 180mm

more than 18m 350mm 500mm 150mm

REMOVAL OF FORMS

Scope of work Minimum time Minimum % of design strength

Centering under girders,

beams, frames or arches 14 days 80%

Floors slabs 14 days 70%

Walls 1 day 70%

Columns 2 days 70%

Sides of beams and all other

vertical surfaces 1 day 70%

SIEVE SIZES NO. 200 0.075mm NO. 20 0.840mm NO. 100 0.150mm NO. 16 1.180mm NO. 60 0.300mm NO. 12 1.700mm NO.50 0.250mm NO. 10 2.000mm NO. 40 0.425mm NO. 8 2.360mm NO. 30 0.600mm NO. 4 4.750mm DETAILS OF WELDS

Size of fillet weld Maximum thickness of part

5mm 13mm 6mm 19mm 8mm 32mm 10mm 51mm 13mm 152mm 16mm 152mm and above

MINIMUM LAP FOR SPLICING

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32 Tension 24 times bar Ø 36 times bar Ø

Compression 20 times bar Ø 24 times bar Ø MINERAL FILLER SHALL BE GRADE WITH IN THE FF. LIMITS (703-A)

Sieve size Mass % passing

NO. 30 100

NO. 50 95 – 100

NO. 200 70 - 100

HYDRATED LIME SHALL CONFORM TO THE FF. REQUIREMENTS (701)

Sieve size Mass % passing

NO. 20 100

NO. 200 85 - 100

MINIMUM WEIGHT OF SAMPLE FOR MOISTURE CONTENT

Sieve No. (passing) Weight

NO. 40 25 grams NO. 10 50 grams NO. 4 200 grams ½” 300 grams 1” 500 grams 2” 1000 grams

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33

REVIEW

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34 1. What is the sample for compressive strength determination of a structural

concrete?

Answer: concrete cylinder sample

2. What is the test to determine the consistency of concrete? Answer: Slump test

3. What is the length required for RSB sample for quality test? Answer: 1.0 m/10,000kg/size/shipment

4. How many samples should be taken for every 75 cu.m fresh concrete? Answer: 1 set consist of 3-pcs sample

5. What is the required size of test specimen for G.I. sheets? Answer: 3 pcs-60mm x 60mm in 1 sht/100shts

6. What kind of paint that has a reflectance or beads? Answer: Reflectorized paint

7. What is that construction material that has a property of being a dark brown to black cementitious material in which the predominating substance is bitumen? Answer: asphalt

8. For how long or how many hours shall a bituminous prime coat be left undisturbed?

Answer: 24 hours

9. What is the rate of application of bituminous tack coat? Answer: 0.2 to 0.7 L/sq. m

10. What is the penetration grade of blown asphalt? Answer: 0 to 30 penetration grade

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35 11. What kind of sample is taken for flexural test?

Answer: concrete beam sample

12. What are the tests needed for the 2.650 cu.m Item 201 (Aggregate Base Course)? Answer: CBR, abrasion, GPCD

13. How many grading tests are required for a 3,200 cu.m selected borrow topping (Item 104)?

Answer: 3 grading tests

14. As a materials Engineer, what will you recommend if you find out that the materials to be used as Item 200 if finer than the required materials?

Answer: blend Item 200 with coarser materials

15. What is the standard specification for LL and PI of Item 201? Answer: maximum of 25% and maximum of 6% respectively 16. What is the CBR requirement for Item 201?

Answer: 80% maximum

17. What asphalt is used for sealing weaken plane joint of concrete pavement? Answer: Blown Asphalt

18. What is Item 311 of the DPWH Specification (Blue Book)? Answer: Portland Cement Concrete Pavement

19. What is the machine used for abrasion test? Answer: Los Angeles Abrasion Machine

20. How to determine the degree of compaction of Items 104, 200, & 201? Answer: by Field Density Test

21. What is the formula in obtaining the value of PI? Answer: Liquid Limit minus Plastic Limit 22. What are the other terms for sieve analysis?

Answer: Grading Test, Particle Size Distribution Test, Mechanical Analysis 23. What is the degree of compaction of the soil if the wet density is 2,200 kg/m3,

with an actual moisture content of 10.2% and a maximum dry density of 1,960 kg/m3?

Answer: 101.86%

24. How many concrete cores shall be taken for one (1) kilometer concrete pavement? Answer: 5 holes/km/lane

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36 25. What is the moisture content of the soil having an original weight of 162.5 grams

and an oven – dried weight of 138.2 grams? Answer: 17.58%

26. If the group index of a soil is high, what indication does it mean? Answer: the soil is clayey

27. As a Materials Engineer, how can you determine that the sample placed in the oven is already oven – dried?

Answer: if the sample reaches its constant weight

28. In oven drying a sample for test, what temperature shall be maintained? Answer: 110 ± 5°C

29. Why is it that cooling an oven dried sample before weighing is advisable? Answer: because it can affect its weight

30. What is the difference between hygroscopic moisture content from natural moisture content?

Answer: HYGROSCOPIC MOISTURE CONTENT is the moisture content of an air – dried sample while NATURAL MOISTURE CONTENT is the moisture content of the original sample from the field.

31. For how many bags of cement does a 10 kgs sample represents? Answer: 2000 bags

32. For 15, 000 kgs RSB, how many samples shall be submitted for Quality Test? Answer: 2 pcs – 1 m sample

33. An admixture is being introduced to the fresh concrete mixture for heavily reinforced concrete structure using a pumpcrete to pump out the fresh concrete mix, what admixture should it be?

Answer: Superplasticizer 34. What is the use of blown asphalt?

Answer: as joint filler and water proofing

35. What asphalt is commonly known as hot asphalt or penetration grade asphalt? Answer: Asphalt Cement

36. How many days does the sample for Immersion – Compression Test be soaked in water?

Answer: 4 days @ 50°C

37. If ductility test is for asphalt, _____ is for cement?

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37 38. Paint is composed of _____

Answer: 35% vehicle, 50% pigment, 15% beads

39. What is the size of tamping rod used in tamping concrete sample? Answer: 16 mm Ø and 610 mm long with hemispherical tip

40. What is the temperature to be maintained when curing sample after its initial curing?

Answer: 23°C ± 1.7°C

41. Concrete cylinders are cured and ready for test. Temperature between 63°F to 85°F are permitted for a period not to exceed _____ hours immediately prior to test if free moisture is maintained on the surface of the specimen at all times. Answer: three (3)

42. The molds of specimen not to be transported shall be removed after initial curing of _____ hours and should be cured to the standard curing temperature of 73.4 °F ± 3°F

Answer: Twenty – four (24)

43. High plasticity index means _____ of a soil? Answer: high degree of compressibility

44. Sample to be used for liquid limit and plastic limit tests should pass to what sieve?

Answer: No. 40 (0.425 mm)

45. What compaction rammer shall used if the specs given for Moisture – Density Relation Test (MDR) is T – 180?

Answer: 4.54 kg with 457 mm drop

46. A bean mold measuring 6” x 6” x 20 is to be used for sampling concrete, how many blows/tamps per layer shall be applied?

Answer: 60 blows/layer

47. If asphalt mix having a weight of 3,020g and an aggregate weighing 2,865.98g, what is the % asphalt by weight of mix?

Answer: 5.10%

48. What is the material used for Bituminous Prime Coat? Answer: Cut – back asphalt

49. In Item 303, application of cover aggregates shall be evenly spread over the surface at the rate of approximately _____?

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38 50. Applying the tolerance of 0.4% for asphalt content to your answer in prob. 47,

what is the acceptable range of asphalt content? Answer: 4.7% to 5.5%

51. An embankment having a PI of 30%, LL of 40% and GI of 0, what is the degree of compaction for this kind of soil?

Answer: 95% degree of compaction

52. The minimum cement factor for concrete Class “A” is 9 bags/cu.m, how about for concrete Class “B”?

Answer: 8 bags/cu.m

53. Quality control testing in a DPWH project is the responsibility of the_____? Answer: Contractor

54. As Materials Engineer, when is the right time to start sampling and testing aggregates?

Answer: Once the source is identified

55. The minimum compressive strength for concrete Class “P” is 5,000 psi, what is the minimum compressive strength for concrete Class “C”?

Answer: 3,000 psi

56. The volume of concrete mixer per batch shall not exceed the mixer’s nominal capacity in cu.m as shown on the manufacturer’s standard plate on the mixer, except that an overload up to _____ percent above the mixer’s nominal capacity may be permitted provided concrete test data for strength, segregation, and uniform consistency are satisfactory, and provided that no spillage of concrete takes place.

Answer: Ten (10)

57. Where do we take additional cores when the measurement of any core taken from pavement is deficient in thickness by more than 25 mm?

Answer: at no less than 5 meter intervals parallel to the centerline in each direction from the affected location

58. Under what climatic condition do we use lower penetration grade or hard asphalt? Answer: hot climate (cold climate – higher penetration grade or soft asphalt) 59. What is the basis for the acceptance or rejection of any construction material?

Answer: Materials test results/reports

60. Penetration test is for asphalt: cement is to _____? Answer: consistency

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39 61. Slump test is a very important test in fresh concrete to determine _____?

Answer: consistency of concrete

62. How many samples should be taken for an asphalt mix for each full day’s operation?

Answer: at least one but not to exceed three samples

63. The thickness of asphalt core using a caliper is based on how many measurements?

Answer: four (4)

64. The thickness of concrete core using a caliper is based on how many measurements?

Answer: nine (9)

65. Failed samples do not necessarily mean that the structure it represents is defective, why?

Answer: may be the sampling is incorrect

66. The specification calls for a 1: 2:4 concrete mix. In a one bagger mixer, which of the following amount of water is most likely required for the mix?

Answer: 20 liters

67. The spot test on asphalt is used to determine ______. Answer: overheating during the process of manufacture

68. How many samples shall be submitted for test if 315 pails of flat wall enamel paint are to be used in the project?

Answer: four (4) pails

69. Aggregate Sub – base course has a volume of 5, 000 cu.m and to be laid in a 15cm compacted depth. How many samples shall be submitted for CBR test and for sieve analysis?

Answer: 2 samples for CBR and 17 samples for sieve analysis

70. How many samples shall be submitted for quality test if 60 tons of Bituminous Prime Coat is to be used in the project?

Answer: Two (2) samples

71. How many compaction tests shall be conducted for Item 201 having a volume of 8,250 cu.m?

Answer: Six (6) compaction tests

72. What composed of Materials Quality Control Monthly Reports? Answer: Summary of field tests and status of test

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40 Answer: 1 part cement and 2 parts sand by volume with sufficient water 74. What is the required mixing of mortar for Item 500 (Pipe Culverts and Storm

Drains)?

Answer: 1 part cement and 2 parts sand by volume with sufficient water 75. Before the project starts, the materials Engineer or the technician must have a

program on how many samples for each item of work should be tested based on the minimum testing requirements. What program or report is this?

Answer: Quality Control Program

76. If sample splitter is not available for use in reducing samples for test, what is the alternative way of reducing sample for testing size?

Answer: apply quartering method and get two opposite sides as sample 77. The road will not be opened to traffic until test specimens molded and cured have

attained the minimum strength requirements. If such tests are not conducted prior to the specified age the pavement shall not be operated to traffic until _____ days after the concrete was placed.

Answer: Fourteen (14)

78. As the work progresses, the Materials Engineer should know how many sample has been submitted and tested and how many samples are to be submitted, in other words the ME must refer to what report so that he/she may be updated on the balance and on file quality test of the construction materials being used in the project?

Answer: Status of Test

79. It is the minimum moisture content at which the soil can be molded without breaking or crumbling up to 1/8” (3.2 mm).

Answer: Plastic Limit

80. The _____ is expressed as the moisture content corresponding to 25 blows. Answer: Liquid Limit

81. The concrete has been tested for consistency by the use of a slump cone with base and tamping rod. After the test, the height of concrete measured is 178 mm. what is the slump of the concrete?

Answer: 127 mm

82. What is the rate of revolution per minute of an abrasion Machine used for testing the mass percent of wear?

Answer: 30 – 33 rpm

83. If the design of concrete mix has the following corrected batch weights: cement = 40 kgs, fine aggregates = 65 kgs, coarse aggregate = 115 kgs, and water = 15 liters. What is your actual batch weights for 1 cu.m Class “A” concrete?

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41 Answer: 360 bags of cement; 585 kgs of fine aggregates; 1035 kgs coarse aggregates; 130 liters water

84. After the soil has been tested in an Abrasion Machine, the mass % of wear computed is equal to 21%. If this material is for Item 201, does it pass the DPWH specs?

Answer: Yes, because the specs is 50% maximum

85. Quality Control Assurance Report should be submitted every _____? Answer: week

86. One of the duties of Materials Engineer is to see to it that all the construction materials be tested:

Answer: before it is incorporated into work

87. What is the maximum depth or roadway embankment per horizontal layer in loose measurement?

Answer: 200 mm loose measurement

88. Why is it that 6 samples are needed for quality test of concrete masonry? Answer: 3 samples for compressive strength and 3 samples for absorption 89. Sample submitted for test should have a tag bearing the name of the project, the

quantity represented, kind of sample, original source, who sampled and who submitted it, the date sampled and date submitted and etc. What is the common name of that tag for you as Materials Engineer?

Answer: Sample Card

90. If course aggregate like embankment is to be placed in layers, how many layers should a 40 cm thick Aggregate Base Course is placed?

Answer: Three (3)

91. The ME should always be alert of his schedule with regards to the number of days of a quality test that takes place. Since not all construction materials can be tested just for a day or even a week so, what is the lead time should he consider for a quality test of a cement sample?

Answer: One (1) month

92. CBR Sample for test has been compacted but it should be soaked for how many days before testing?

Answer: Four (4)

93. If sieve analysis and plasticity test are used for Soil Classification, what test that its result be used in field density test?

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42 94. Heavy rains occur the night before prior to your scheduled field density test, are

you going to pursue your schedule? Why?

Answer: No, because the moisture content is high and can affect the result 95. Checking the gradation of composite aggregates and asphalt content of asphalt

mix can be done by what test? Answer: Extraction Test

96. What is the device used in testing for liquid limit test? Answer: liquid limit device with grooving tool 97. What apparatus is used in plastic limit test?

Answer: glass plate

98. How long does a vibrator be inserted in a concrete mix? Answer: not to exceed 15 seconds at 50 – 60 cm interval

99. Along the slope of high embankment _____ is provided as an erosion control measures and also to improve the stability of the slope.

Answer: Berm

100. In soil and sub – surface explorations for flood control design of foundation condition, a soil sample was taken for field and laboratory tests. The test required for soil was taken, except

Answer: specific gravity, abrasion, water content, Atterberg Limits, gradation, compaction, relative density

101. Structure crossing above such covered underground drainage conduit shall be laid at least _____ above the top of the conduit.

Answer: 1.0 m, 0.5 m, 1.5 m, 2.0 m

102. Class of stones for riprap ranging from 30 kgs to a maximum of 70 kgs with at least 50% of the stones weighing more than 50 kgs.

Answer: Class B

Answer: Class A

Answer: Class C

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43 106. The maximum size of stone for stone masonry.

Answer: 150 mm

107. The maximum size of aggregate for item 300. Answer: 1 inch

108. Required maximum liquid limit for Item 300. Answer: 35%

109. Required plasticity index range on Item 300. Answer: 4% to 9%

110. Range of sand size.

Answer: 2.0 mm to 0.050 mm Ø

111. The ratio of the volume of voids to volume of solids Answer: void ratio

112. The ratio of the weight of water to the weight of solids Answer: moisture content

113. Significance of grading test are, except

Answer: Gives particle size distribution, measures permeability, capillarity, measures the potential cohesion of soil

114. Significance of plasticity index are, except

Answer: indicates compressibility, permeability, indicates the clay fraction of a binder material, measures the shearing resistance of soil

115. Properties of concrete are, except

Answer: workability, strength, durability, cracking

116. In roadway construction test on sub grade, the following will determine the economical thickness, except

Answer: embankment, base, surfacing, sub-base

117. The relative consistency of a cohesive soil in natural state. Answer: Liquidity Index

118. In Atterberg limit, the following are determined, except Answer: shrinkage limit, liquid limit, plastic limit, group index

119. Minimum time for removal of forms and false works for centering under girders, beam, frames and arches.

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44 120. Minimum time for removal of forms and false works for floor slabs.

Answer: 14 days (minimum % of design strength – 70%) 121. Minimum time for removal of forms and false works for walls.

Answer: 1 day (minimum % of design strength – 70%)

122. Minimum time for removal of forms and false works for columns. Answer: 2 days (minimum % of design strength – 70%)

123. Minimum time for removal of forms and false works for side of beams and all other vertical surfaces.

Answer: 1 day (minimum % of design strength – 70%)

124. Amass of solid reinforced concrete cast around the head of a group of piles to ensure that act as a unit to support the imposed load

Answer: Pile cap

125: An embankment shall be compacted layer by layer. Answer: 150 mm

126. Class of concrete deposited in water. Answer: Class Seal

127. Class of concrete used in all superstructures and heavily reinforced substructures. The important parts of the structure included are slabs, beams, girders, columns, arch ribs, box culverts, reinforced abutments, retaining walls, and reinforced footings.

Answer: Class A

128. Class of concrete used in footings, pedestal, massive pier shafts, pipe bedding and gravity walls, unreinforced or w/ only a small amount of reinforcement. Answer: Class B

129. Class of concrete used in thin reinforced sections, railings, pre-cast piles, cribbing, and for filler in steel grid floors.

Answer: Class C

130. Class of concrete used in pre – stressed concrete structures and members. Answer: Class P

131. Height of dropping concrete to the point of deposit Answer: 1.50 m

132. Reflectorized Thermoplastic Pavement Markings Answer: Item 612

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45 133. Permitted variation from the design thickness of layer for Item 300

Answer: + 15 mm and – 5 mm

134. Item 310 shall have a mass percent of air voids with range of _____ Answer: 3% to 5 %

135. Dowel bars for PCCP shall be _____ Answer: plain bars

136. Concrete beam sample when tested by Third – Point Method shall have a flexural strength of _____ when tested in 14 days.

Answer: 3.80 MPa

137. When the required thickness of Item 200 is more than 150 mm, the aggregate sub – base shall spread and compacted in ____

` Answer: two or more layers

138. Item 202 shall have a minimum soaked CBR value of _____ Answer: 80%

139. Permitted variation from design thickness of layer for Item 201. Answer: ± 10 mm

140. Sieve designation standard (in mm) for 0.425 mm to alternate US standard Answer: No. 40

141. If slag is used as course aggregate for Item 311, the minimum density is _____ Answer: 1,120 kg/m3

142. Minimum price allowed of contract for deficiency in strength of concrete specimens for PCCP which 10% to less than 15%

Answer: 70%

143. This joint is also called cold joint. It is constructed when there is an interruption of more than 30 minutes in the concreting operation

Answer: Transverse Construction Joint

144. Minimum variation of the surface from the testing edge of the straight edge between contacts with the surface in Item 310

Answer: 6.0 mm

145. Portland Cement Treated Plant Mix Base Course after the completion of the final rolling, the surface will be treated with bituminous curing seal, how much is the rate of application?

(46)

46 146. In Item 201, the volume required in the project is 10,000 cu.m. The required

number of CBR test is _____ Answer: four (4)

147. Slump test of concrete determines the following, except Answer: workability, fluidity, consistency, job density 148. The significance of liquid limit are the ff., except

Answer: measures the shearing resistance of soil, measures the potential cohesion of soil, fineness and shape of grain, Atterberg limits

149. In soil classification, 35% or less passing No. 200 sieve are the ff., except Answer: A-1, A-2, A-3, A-4

150. To evaluate the performance quality of a soil as a highway subgrade material Answer: Group Index

151. If the paving of concrete pavement will be done at the rate 200 ln.m, half width per paving day, how many sets of concrete beam samples shall be required. Given: A = 115,000 sq.m, width = 6.50 m, thickness = 230 mm

Answer: 353 sets

152. The required liquid limit for selected borrow toppings Answer: 30%

153. The maximum plastic limit for selected borrow toppings Answer: 6%

154. Soil is considered unsuitable material when the liquid limit and plastic limit exceeds

Answer: 80% and 55% respectively

155. Soil is considered unsuitable when the material density is Answer: 800 kg/cu.m or lower

156. The plasticity index is determined in accordance with Answer: AASHTO T 90

157. The liquid limit is determined in accordance with Answer: AASHTO T 89

158. The required compaction of embankment, layer by layer Answer: 95%

159. The minimum compaction trial of embankment Answer: 10 m wide by 50 m long