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Concrete Technology and Design of Concrete Structures

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
The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

0.12
0.14
0.15
0.13

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

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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

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

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Concrete Technology and Design of Concrete Structures
Diagonal tension in a beam

Remains same
Is maximum at neutral axis
Decreases below the neutral axis and increases above the neutral axis
Increases below the neutral axis and decreases above the neutral axis

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Concrete Technology and Design of Concrete Structures
As compared to ordinary portland cement, use of pozzuolanic cement

reduces workability
increases shrinkage
increases bleeding
increases strength

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