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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Workability of concrete is directly proportional to

Grading of the aggregate
Aggregate cement ratio
Time of transit
All of above

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Concrete Technology and Design of Concrete Structures
Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?

creep of concrete
loss due to friction
elastic shortening of concrete
shrinkage of concrete

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Concrete Technology and Design of Concrete Structures
A beam curved in plan is designed for

bending moment and torsion
bending moment and shear
bending moment, shear and torsion
shear and torsion

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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.
fcr
fc5>fcr>fC
tcr – rcs = tct

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Concrete Technology and Design of Concrete Structures
Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is

28 liters
30 liters
34 liters
32 liters

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Concrete Technology and Design of Concrete Structures
If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to

xv
Tv + Tc
xc

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