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Concrete Technology and Design of Concrete Structures

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

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

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

retarders
accelerators
workability admixtures
air entraining agents

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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

100 mm
250 mm
150 mm
200 mm

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

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

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Concrete Technology and Design of Concrete Structures
If a beam fails in bond, then its bond strength can be increased most economi-cally by

using thicker bars but less in number
using thinner bars but more in number
increasing the depth of beam
providing vertical stirrups

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Concrete Technology and Design of Concrete Structures
In a counterfort retaining wall, the main reinforcement is provided on thei) bottom face in front counterfortii) inclined face in front counterfortiii) bottom face in back counterfortiv) inclined face in back counterEortThe correct answer is

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

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