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Concrete Technology and Design of Concrete Structures

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

workability admixtures
accelerators
retarders
air entraining agents

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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

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

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Concrete Technology and Design of Concrete Structures
According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

0.55 d
0.43 d
0.68 d
0.85 d

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Concrete Technology and Design of Concrete Structures
For the design of retaining walls, the minimum factor of safety against overturning is taken as

2
2.5
1.5
3

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Concrete Technology and Design of Concrete Structures
Critical section for shear in case of flat slabs is at a distance of

d/2 from periphery of column/capital/ drop panel
effective depth of slab from periphery of column/drop panel
at the drop panel of slab
at the periphery of column

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Concrete Technology and Design of Concrete Structures
The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is

Provided more on inner face than on front face
Provided equally on inner and front faces
Provided more on front face than on inner face
Not needed

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