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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Poisson’s ratio for concrete

remains constant
None of these
increases with richer mixes
decreases with richer mixes

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Concrete Technology and Design of Concrete Structures
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

0.75 - 0.80
0.85 - 0.92
0.75 - 0.80
Above 0.92

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Concrete Technology and Design of Concrete Structures
Modulus of elasticity of steel as per IS : 456-1978 shall be taken as

200 kN/cm²
200kN/mm²
2xl06N/cm²
20 kN/cm²

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Concrete Technology and Design of Concrete Structures
In counterfort type retaining wallsi) the vertical slab is designed as a continuous slabii) the heel slab is designed as a continuous slabiii) the vertical slab is designed as a cantileveriv) the heel slab is designed as a cantileverThe correct answer is

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

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Concrete Technology and Design of Concrete Structures
The individual variation between test strength of sample should not be more than

± 10% of average
±20% of average
± 15% of average
±5% of average

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Concrete Technology and Design of Concrete Structures
For a cantilever of effective depth of 0.5m, the maximum span to satisfy vertical deflection limit is

4 m
3.5 m
6 m
5 m

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