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Concrete Technology and Design of Concrete Structures

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

15%
10 %
5%
20%

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Concrete Technology and Design of Concrete Structures
According to Whitney’s theory, ultimate strain of concrete is assumed to be

0.4%
0.3%
0.5%
0.6%

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

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

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Concrete Technology and Design of Concrete Structures
Ratio of permissible stress in direct compression and bending compression is

between 1.5 and 2.0
less than 1
between 1 and 1.5
greater than 2

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Concrete Technology and Design of Concrete Structures
According to IS : 456- 1978, minimum slenderness ratio for a short column is

more than 24
less than 18
between 18 and 24
less than 12

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Concrete Technology and Design of Concrete Structures
The percentage of voids in cement is approximately

70%
60%
50%
40%

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