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Concrete Technology and Design of Concrete Structures

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

0.6%
0.4%
0.3%
0.5%

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

air entraining agents
accelerators
retarders
workability admixtures

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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
100 mm
150 mm
250 mm

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Concrete Technology and Design of Concrete Structures
Prestress loss due to friction occurs

in both post-tensioned and preten-sioned beams
None of these
only in pretensioned beams
only in post-tensioned beams

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Concrete Technology and Design of Concrete Structures
The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone

bond stress
shear stress
tensile stress
compressive stress

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Concrete Technology and Design of Concrete Structures
In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by

50%
70 %
40%
60%

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