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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
A higher modular ratio shows

higher compressive strength of con-crete
higher tensile strength of steel
lower compressive strength of concrete
lower tensile strength of steel

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Concrete Technology and Design of Concrete Structures
Workability of concrete is inversely proportional to

size of aggregate
the air in the mix
time of transit
vater-cement ratio

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Concrete Technology and Design of Concrete Structures
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

0.75 - 0.80
Above 0.92
0.85 - 0.92
0.75 - 0.80

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Concrete Technology and Design of Concrete Structures
1% of voids in a concrete mix would reduce its strength by about

15%
20%
10 %
5%

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Concrete Technology and Design of Concrete Structures
As compared to ordinary portland cement, use of pozzuolanic cement

increases strength
reduces workability
increases bleeding
increases shrinkage

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Concrete Technology and Design of Concrete Structures
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on i) bottom face near counterfort ii) top face near counterfort iii) bottom face near centre of span iv) top face near centre of span The correct answer is

both (i) and (iv)
only (ii)
only (i)
both (ii) and (iii)

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