TESTING REQUIREMENTS

LWCF Grant No. 26-01808 A. Geotechnical Testing

1. Inspect and test undisturbed soil subgrades prior to placement of engineered fill or concrete foundations.

2. Inspect and test engineered fill and aggregate subgrades prior to placement of foundation or slab-on-grade concrete.

B. Structural Excavation, Backfill and Compaction

1. Soil Classification of Satisfactory Excavated and Borrow Material: Determine in accordance with Uniform Soil Classification System (ASTM D2487).

2. Granular Materials: Grain size analysis and for satisfactory Excavated Material and Borrow Material only, liquid limit and plasticity index.

3. Optimum Moisture-Maximum Density Curves: For soil materials having a well-defined moisture–density relationship, make for each kind of subgrade material under fills and for each kind of soil material for fills and backfills in accordance with the Modified Proctor Test Method D (AASTHO T180 or ASTM D1557) for soil materials around structures.

4. Relative Density Tests: For cohesionless free-draining soil materials not having a well-defined moisture density relationship curve, make for each kind of soil specified in Paragraph 1.15.B.3 in accordance with ASTM D2049.

5. Soil Bearing Tests: Make penetration and unconfined compression test as required to verify soil-bearing capacity under concrete footings and

foundation walls. 6. Field Density Tests:

a. determine by balloon method (AASHTO T205 or ASTM D2167) or by sand cone method (AASHTO T191 or ASTM D1556) or nuclear methods (ASTM D2922).

b. Make field density tests of compacted subgrade soil on basis of 3 tests plus one additional test per 10,000 sq. ft. area or fraction thereof. c. Make 3 field density test of each lift of compacted fill or backfill placed

each day.

C. Trenching, Backfilling and Compacting 1. Laboratory Tests

a. As specified in Paragraph 1.15.D for satisfactory excavated material, borrow material, and Class 2 granular material.

b. As specified in Paragraph 1.15.G for aggregate base course material. 2. Field Density Tests:

a. determine by balloon method (AASHTO T205 or ASTM D2167) or by sand cone method (AASHTO T191 or ASTM D1556) or nuclear methods (ASTM D2922).

b. Make at least 3 field density tests of compacted subgrade soils and compacted backfill placed each day.

LWCF Grant No. 26-01808

D. Excavating, Filling and Grading: All tests required under section 1.15.B above shall apply.

E. Walkway Excavation Backfill and Compaction:

1. Soil Classification of Satisfactory Excavated and Borrow Material: Determine in accordance with Uniform Soil Classification System (ASTM D2487).

2. Optimum Moisture-Maximum Density Curves: Make for each kind of subgrade material and for each kind of soil material for fills or backfills in accordance with the Modified Proctor Test Method D (AASTHO T180 or ASTM D1557).

3. Field Density Tests:

a. determine by balloon method (AASHTO T205 or ASTM D2167) or by sand cone method (AASHTO T191 or ASTM D1556) or nuclear methods (ASTM D2922).

b. Make field density tests of compacted subgrade soil on basis of 3 tests plus one additional test per 10,000 sq. ft. area or fraction thereof. F. Subdrainage System

1. Determine grain analysis of aggregate bedding in accordance with ASTM C 136.

2. Make relative density test of aggregate bedding materials in accordance with ASTM D2049.

3. Make field density tests of compacted aggregate bedding material on the basis of one test per 500 cubic yards of material in accordance with ASTM D2922.

G. Aggregate Base Course

1. Determine maximum density and optimum moisture content for aggregate base material by ASTM D 1557, method D.

2. Make a minimum of three field density tests on each day's final compaction on each aggregate course (AASHTO T191) or more specifically below: a. (Concrete Walkway Pavement) – field density tests every 50 feet. b. (Bituminous Aggregate Concrete Pavement) – field density tests every

100 feet.

3. Sample and test aggregate as necessary to insure compliance with specification requirements for gradation and quality.

H. Bituminous Aggregate Concrete Pavement (Roadway Paving)

1. Verify Mix Design by testing standard cylinders for Asphalt Content, Percent Air Voids, Aggregate Gradation, Percent of Voids in Mineral Aggregate. Take a minimum of three samples per day for the initial 1,000 Ton of asphalt and 3 tests per day for every 1,000 Ton thereafter. Samples shall be taken on-site in morning, afternoon, and evening or at the discretion of the Engineer.

LWCF Grant No. 26-01808 2. Field Density Tests:

a. Determine by nuclear density methods (ASTM D2922).

b. Make field density tests of compacted bituminous aggregate on basis of one test every 50 linear feet.

(Trail Paving)

1. Verify Mix Design by testing standard cylinders for Asphalt Content, Percent Air Voids, Aggregate Gradation, Percent of Voids in Mineral Aggregate. Take a minimum of three samples per day for the initial 500 Ton of asphalt and one test for every 500 Ton thereafter. Initial samples shall be taken on- site in morning, afternoon, and evening or at the discretion of the Engineer. 2. Field Density Tests:

a. Determine by nuclear density methods (ASTM D2922).

b. Make field density tests of compacted bituminous aggregate on basis of one test every 50 linear feet.

I. Cast-in-place Concrete

1. The testing laboratory services will provide the testing requirements for concrete specified in this section and Ready-mixed Structural Concrete and Ready-mixed Site Concrete.

2. Testing Concrete Structure for Strength

a. The strength of the concrete structure-in-place will be considered potentially deficient if it does not comply with any of the requirements which control strength of the structure, including the following

conditions:

i. Failure of the concrete to meet compressive strength tests as evaluated under Concrete Curb, Gutter, and Dividers.

ii. Reinforcement not conforming to the requirements specified under Concrete Curb, Gutter, and Dividers.

iii. Concrete curing and protection of concrete against temperature extremes during placement and curing not conforming to the requirements herein specified.

iv. Concrete work subjected to damaging mechanical disturbances, particularly load stresses, heavy shock and excessive vibrations. v. Poor workmanship likely to result in deficient strength.

b. Where there is evidence that the strength of the concrete structure-in- place does not meet specification required as determined by the Engineer, the Contractor shall at his own expense, make compressive strength tests of cores drilled from hardened concrete in accordance with ASTM C42 and as follows:

i. At least three representative samples shall be taken from each member or area of concrete-in place that is considered potentially deficient. The location of cores shall be determined by the

Engineer.

ii. Cores shall be tested saturated-surface-dry if the concrete they represent will be wet at any time during the use of the completed structure.

LWCF Grant No. 26-01808

iii. Cores shall be tested air-dry if the concrete they represent will be dry at all times during the use of the completed structure.

iv. Cores shall be made by a concrete testing laboratory approved by the Engineer.

v. Test results shall be reported in writing to the Engineer on the same day the test is made. Reports shall contain Project name, Project No., date, name of Contractor, name of concrete testing service, location of each test core in the structure, concrete class and designation represented by each core sample, compression breaking strength and type of break, length of core test specimen before capping, compression strength after correcting for length- diameter ratio, direction of application of the load and the core test specimen with respect to the horizontal plane of the concrete as placed, and the moisture condition of the core test specimen at the time of testing.

vi. Strength of cores from each member or area will be considered satisfactory if their average compressive strength is equal to or greater than 90% of the 28 day compressive strength of the concrete class designation they represent.

vii. Core holes shall be filled with patching mortar and finished to match the adjacent concrete surfaces.

c. If the results of the core tests are unsatisfactory, or if core test are impracticable to obtain, the Contractor shall conduct, at his own expense, static load tests in the presence of the Engineer. Such tests shall be made and evaluated in accordance with Chapter 4 of ACI 318. d. For concrete work that is found inadequate either by core tests or by

static load tests, the Contractor shall, without cost to the Owner, either: i. Remove and rebuild.

ii. Add additional concrete construction to make the structure adequate.

J. Ready-Mixed Structural Concrete

1. Conduct strength tests of the concrete during construction in accordance with the following:

a. Secure composite samples in accordance with ASTM C172. Each sample shall be obtained from a different batch of concrete on a random basis, avoiding any selection of the test batch other than by a number selected at random before commencement of concrete placing. b. Mold and cure 4 specimens for each strength test sample in

accordance with ASTM C31. Any deviations from the requirements of ASTM C31 shall be reported in the test reports. Cure one specimen in the field and cure three specimens in the laboratory.

c. Test specimens in accordance with ASTM C39. The field-cured specimen shall be tested at seven days for information, two of the laboratory-cured specimens shall be tested at 28 days for acceptance, and one specimen retained in reserve for later testing if required. The acceptance test results shall be the average of the strength of the two specimens tested at 28 days. If one specimen in a test manifests

LWCF Grant No. 26-01808

evidence of improper sampling, molding or testing, it shall be discarded and the strength of the reserve cylinder shall be tested and added for an average strength. In the event both specimens in a test show any of the above defects, the entire test shall be discarded. When high early strength concrete is used, the field-cured specimen shall be tested at 3 days for information and the two laboratory-cured specimens shall be tested at 7 days for acceptance. 6” x 12” cylinders shall be used. d. Make at least one strength test for each 30 cu yd or fraction thereof, of

each concrete class designation placed in any one day except that in no case shall any concrete class designation be represented by less than 5 strength tests.

e. Determine slump if concrete appears to vary. Measure slump in accordance with ASTM C143.

f. Determine air content of the concrete sampled for each strength test in accordance with ASTM C231.

g. Determine temperature of concrete sampled for each strength test. 2. Submit four copies of concrete reports of each concrete class designation

for slump, air content and strength tests as specified in Section 16 of ASTM C94.

K. Ready-Mixed Site Concrete

1. Conduct strength tests of the concrete during construction in accordance with the following:

a. Secure composite samples in accordance with ASTM C172. Each sample shall be obtained from a different batch of concrete on a random basis, avoiding any selection of the test batch other than by a number selected at random before commencement of concrete placing. b. Mold and cure 4 specimens for each strength test sample in

accordance with ASTM C31. Any deviations from the requirements of ASTM C31 shall be reported in the test reports. Cure one specimen in the field and cure three specimens in the laboratory.

c. Test specimens in accordance with ASTM C39. The field-cured specimen shall be tested at seven days for information, two of the laboratory-cured specimens shall be tested at 28 days for acceptance, and one specimen retained in reserve for later testing if required. The acceptance test results shall be the average of the strength of the two specimens tested at 28 days. If one specimen in a test manifests evidence of improper sampling, molding or testing, it shall be discarded and the strength of the reserve cylinder shall be tested and added for an average strength. In the event both specimens in a test show any of the above defects, the entire test shall be discarded. When high early strength concrete is used, the field-cured specimen shall be tested at 3 days for information and the two laboratory-cured specimens shall be tested at 7 days for acceptance. 6” x 12” cylinders shall be used. d. Make at least one strength test for each 30 cu yd or fraction thereof, of

each concrete class designation placed in any one day except that in no case shall any concrete class designation be represented by less than 5 strength tests.

LWCF Grant No. 26-01808

e. Determine slump if concrete appears to vary. Measure slump in accordance with ASTM C143.

f. Determine air content of the concrete sampled for each strength test in accordance with ASTM C231.

g. Determine temperature of concrete sampled for each strength test. 2. Submit four copies of concrete reports of each concrete class

designation for slump, air content and strength tests as specified in Section 16 of ASTM C94.