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Concrete Technology and Design of Concrete Structures

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
For walls, columns and vertical faces of all structural members, the form work is generally removed after

3 days
14 days
24 to 48 hours
7 days

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Concrete Technology and Design of Concrete Structures
In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

200 mm
150 mm
100 mm
250 mm

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

0.5%
0.3%
0.4%
0.6%

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

20%
15%
10 %
5%

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Concrete Technology and Design of Concrete Structures
Poisson’s ratio for concrete

None of these
increases with richer mixes
remains constant
decreases with richer mixes

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