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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

100 mm
120 mm
50 mm
75 mm

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Concrete Technology and Design of Concrete Structures
Admixtures which cause early setting, and hardening of concrete are called

retarders
workability admixtures
air entraining agents
accelerators

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Concrete Technology and Design of Concrete Structures
Select the incorrect statement for ...

None of these
Lean mixes bleed more as compared to rich ones.
Bleeding can be increased by addition of calcium chloride.
Bleeding can be minimized by adding pozzuolana finer aggregate.

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Concrete Technology and Design of Concrete Structures
The effect of adding calcium chloride in concrete is i) to increase shrinkage ii) to decrease shrinkage iii) to increase setting time iv) to decrease setting time The correct answer is

(i) and (iii)
(ii) and (iv)
(i)and(iv)
(ii) and (iii)

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Concrete Technology and Design of Concrete Structures
Sinking of an intermediate support of a continuous beami) reduces the negative moment at supportii) increases the negative moment at supportiii) reduces the positive moment at center of spaniv) increases the positive moment at center of span The correct answer is

(ii) and (iii)
(i) and (iv)
(ii) and (iv)
(i) and (iii)

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Concrete Technology and Design of Concrete Structures
Bulking of sand is maximum if moisture content is about

7%
6%
5%
4%

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