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Concrete Technology and Design of Concrete Structures

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

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

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Concrete Technology and Design of Concrete Structures
The limits of percentage p of the longitudinal reinforce-ment in a column is given by

0.8% to 6%
0.8% to 8%
0.8% to 4%
0.15% to 2%

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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

0.5
0.75
0.33
1

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Concrete Technology and Design of Concrete Structures
Finer grinding of cement

affects only the early development of strength
affects only the ultimate strength
does not affect the strength
both (a) and (b)

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

increases strength
reduces workability
increases shrinkage
increases bleeding

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Concrete Technology and Design of Concrete Structures
If a beam fails in bond, then its bond strength can be increased most economi-cally by

using thinner bars but more in number
providing vertical stirrups
increasing the depth of beam
using thicker bars but less in number

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