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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
A T-shaped retaining wall mainly conssits of

one cantilever
two cantilevers
four cantilevers
three cantilevers

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

workability
strength
the effects of temperature variations
the unit weight

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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

0.85 d
0.55 d
0.68 d
0.43 d

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

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

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Concrete Technology and Design of Concrete Structures
The average permissible stress in bond for plain bars in tension is

decreased by 10% for bars in compression
decreased by 25% for bars in compression
increased by 10% for bars in compression
increased by 25% for bars in compression

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Concrete Technology and Design of Concrete Structures
The approximate value of the ratio between direct tensile strength and flexural strength is

0.75
1
0.5
0.33

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