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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

fcr>fcs>fc.
fc5>fcr>fC
tcr – rcs = tct
fcr

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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
If a beam fails in bond, then its bond strength can be increased most economi-cally by

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

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Concrete Technology and Design of Concrete Structures
The effect of creep on modular ratio is

to increase it
either to decrease or to increase it
to keep it unchanged
to decrease it

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Concrete Technology and Design of Concrete Structures
While designing the pile as a column, the end conditions are nearly

both ends hinged
one end fixed and other end free
one end fixed and other end hinged
both ends fixed

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

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

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