Shanghai Tower Construction Materials.pptx

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SHANGHAI TOWER

(Modern Construction Materials)

Presented by :

•

•Brijesh PatelBrijesh Patel

•

•Darren SequeiraDarren Sequeira

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•Divyesh PatelDivyesh Patel

•

•Gourav Kumar LodhaGourav Kumar Lodha

•

•Saurabh Kumar Saurabh Kumar

•

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Critical Components in this Project

Foundation

Concrete

Admixtures

Inner Cylindrical

Tower

Composite

Column

Steel

Concrete

Facade

Glass

Sealant

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Construction Materials

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Foundation detail

 Raft Foundation of diameter : 120 metres and 6 metres depth.

 955 number of cast in-situ pile of dia-1 metre and 52-56m height.

 Steel : HYSD-500 of varying diameters.

• Type of Concrete : Self Compacting Concrete (SCC). • Grade of Concrete : C50R90

• Total Concrete consumed in Raft : 61,000 cu.m • Mix Design of C50

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Construction Materials

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Self Compacting Concrete

Properties :

• Filling ability (unconfined flowability) -The ability of SCC to flow into and fill

completely all spaces within the formwork, under its own weight.

• Easy Pumping.

• Pumping Capacity carried out at site – 1,000 cu.m per hour. • Concrete temperature maintained at <20° C.

• No bleeding and Segregation.

• Concrete placement was easier , faster and better at site. • Better Surface finish attained.

• Heavily reinforced concreting was possible at the site since due to the flowing ability of

the SCC.

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Construction Materials

• Manufactured Sand (Used as an alternative to natural sand)

 Increased durability of the concrete.

 Increases workability.

 Reduces construction defects.

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Construction Materials - Admixtures used

• Triple Blend of OPC + PFA (Pulverised Fly Ash) + GGBS (Ground

Granulated Blast Furnace Slag )

 This combination was used to ensure higher durability of the structure.

 It helped to maintain the temperature rise due to heat of hydration, thus the concreting was carried out successfully at < 23°C .

 Also since foundation structures are more prone to higher action to sulphate and chloride attack , this triple blend helped to resist the attacks when compared with normal ordinary concrete.

• Rheoplus 325 admixture by BASF

 It delivered a new benchmark in concrete workability. It gave

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Construction Materials - Admixtures used

• Slag Micro Powder

 The project adopts the concrete with Baosteel's slag micro powder as the important raw material and admixture, which, combining with the scientific pouring method, can effectively avoid the quality problems such as structural crack etc.

 To improve the compactness of the concrete and also to improve interface transition zone between the hydration products and aggregate which are benefit for the

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Construction Materials - Admixtures used

 High Performance Poly-carboxylate (HPCC) super-plasticizer

 Wide adaptability.

 High water reduction.

 Good slump retention ability.

 Good dispersibility and good cohesiveness.

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Construction Materials

 Inner Cylindrical Tower

Components of Inner Cylindrical Tower  Mega Column  Concrete Core  Outrigger Truss  Belt Truss  Diagonal Column  Radial Truss

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Construction Materials

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Mega Columns

 The mega-column system is a composite type of structure.

 Steel reinforced concrete columns of Steel Grade Q345-Q460 of 100mm and 50mm thickness.

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Construction Materials

Progra mmer

Code

Related chemical composition

Hardness (HB Extension(% Tensile Strength MP Yield Strength MP Materi al C Si Mn P S Q345B 0.18 0.55 1.4 0.03 0.03 163-187 21 470-660 345

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Construction Materials

High strength low alloy structural steel GB/T 1591-2008 EN 10028-3-2003 EN 10025-2004 ASTM A572-07 ASTM A588-05 Q345 (A/B/C/D/E)

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Construction Materials

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Façade

 More than 200,000 square metres of SentryGlas® interlayer is used in the double skin glass facades.

 SentryGlas® interlayer are 5 times stronger and upto 100 times stiffer than conventional laminating material.

Curtain Wall A (Outer Glass Façade): 26 mm laminated glass assembly: 12 mm low-iron annealed glass +1.52 mm SentryGlas interlayer +12 mm low-iron annealed glass + low-e coating.

Curtain Wall B (Inner Glass Façade): 30 mm insulated glass assembly: 6 mm low-iron glass with +0.89mm SentryGlas interlayer + 6mm low-iron glass +12mm air void + 6mm low-iron glass + low-e coating.

 Low-iron glass provides improved visual clarity by increasing light transmission and reducing the greenish tint in clear glass that is most apparent when viewed from the

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Construction Materials

 Low deflection, stronger glass before and after breakage.

 Bolted and frameless glass.

 Able to fulfil high architectural safety standards at reduced thickness as compared to monolithic glass.

 Butt-jointed freedom

 It retains its outstanding quality even after years of service.

 Noise reduction and also safety and maintenance ease.

 Special Features

• Hurricane resistant

• Bomb blast shatter resistant.

 Applications

• Can also be used in structural glass flooring,stairs,walkways

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Construction Materials

Property Units Metric (English)

Value ASTM Test Young’s Modulus Mpa (kpsi) 300 (43.5) D5026

Tensile Strength Mpa (kpsi) 34.5 (5.0) D638

Elongation % 400 D638 Density g/3 _{0.95 (0.0343)} _D792 Flex Modulus 23° C (73°F) Mpa (kpsi) 345 (50) D790 Heat Deflection Temperature at 0.46 Mpa ° C (°F) 43 (110) D648 Melting Point ° C (°F) 94 (201) (DSC) Co-efficient of Thermal Expansion (-20°C to 10−5 _{cm/cm ° C} (mil/in ° C) 10-15 (0.10-0.15) D696

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Construction Materials-Sealants

XIAMETER alkoxy sealants are one-part, room-temperature vulcanizing (RTV) silicone sealants.

• Features And Benefits

 Ready-to-use, one-component sealant

 Can be used in geographic regions where use of oxime sealants is restricted

 Low odor

• Typical Uses

 General purpose sealing and bonding

 Weather sealing

 Space-filling rubber adhesive

 Caulking and sealing window and door frames, siding

• Chemistry

 Condensation cure occurs at room temperature upon exposure to moisture in air

 Alkoxy cure chemistry produces a neutral byproduct, typically an alkyl or methyl alcohol

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Construction Materials-Insulation Material

 Armaflex Sheet and Roll Insulation is a flexible, elastomeric thermal insulation, black in color.

 Uses :

• It was used to retard heat gain and control condensation drip from chilled water and

refrigeration systems.

• It efficiently reduced heat flow on hot systems.

 Applications :

It is was particularly adaptable for insulating

ductwork, large piping and fittings

tanks

vessels

curved and irregular surfaces

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Learnings

 Benefits of using Self Compacting Concrete in Complex Structures.

 Usage and importance of admixtures as Modern Construction Chemicals.

 Use of alternative raw-materials and their advantages.

 Importance and usage of Composite Structures in high-rises.

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Recommendations

 Eco-SCC is greener alternative to conventional self compacting concrete.

 Use of nano-technology (CNT reinforced glass) in Façade.

 Composite rebar (FRP) also is useful in weight sensitive were soils have poor load bearing properties, in seismically active zones or environmentally sensitive areas.

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References

 Shanghai Tower: Building a Green, Vertical City in the Heart of Shanghai - 26 Oct 2015 – Asia & Australasia: A Selection of Written Works on the World's Tall Building Forefront; Jianping Gu, Shanghai Tower Construction & Development Co. Ltd.

 Construction Technology and Management Innovation - 16 Sep 2014 – Shanghai Tower: In Detail; Zhenfeng Gao & Duanxue Shi, Shanghai Construction Group Co. Ltd.

 Making the World’s Greenest Tall Building - 16 Sep 2014 – Shanghai Tower: In Detail; Jihong Han & Hongwu Fan, Shanghai Research Institute of Building Sciences

 Shanghai Tower: Building a Green, Vertical City in the Heart of Shanghai - 16 Sep 2014 – CTBUH 2014 Shanghai Conference Proceedings; Jianping Gu, Shanghai Tower Construction & Development Co. Ltd.

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