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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

air entraining agents
workability admixtures
retarders
accelerators

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Concrete Technology and Design of Concrete Structures
Increase in the moisture content in concrete

All of these
increases the strength
does not change the strength
reduces the strength

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Concrete Technology and Design of Concrete Structures
The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on

None of these
top face perpendicular to wall
bottom face perpendicular to wall
both top and bottom faces perpendicular to wall

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Concrete Technology and Design of Concrete Structures
In counterfort retaining walls, the main reinforcement in the stem at support is

Provided both on inner and front faces
Not provided
Provided only on front face
Provided only on inner face

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Concrete Technology and Design of Concrete Structures
Strength of concrete increases with

increase in water-cement ratio
increase in fineness of cement
decrease in size of aggregate
decrease in curing time

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Concrete Technology and Design of Concrete Structures
In counterfort type retaining walls i) the vertical slab is designed as a continuous slab ii) the heel slab is designed as a continuous slab iii) the vertical slab is designed as a cantilever iv) the heel slab is designed as a cantilever The correct answer is

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

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