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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The strength of concrete after one year as compared to 28 days strength is about

25 to 50% more
15 to 20% more
10 to 15% more
20 to 25% more

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Concrete Technology and Design of Concrete Structures
Shrinkage of concrete depends uponi) humidity of atmosphereii) passage of timeiii) stressThe correct answer is

only (iii)
(ii) and (iii)
(i) and (ii)
All (i), (ii) and (iii)

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

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

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Concrete Technology and Design of Concrete Structures
Which of the following R.C. retaining walls is suitable for heights beyond 6m?

All of these
counterfort type
L-shaped wall
T-shaped wall

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Concrete Technology and Design of Concrete Structures
Air entrainment in the concrete increases

workability
the unit weight
strength
the effects of temperature variations

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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

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

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