According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm2) can be taken as______________?
A. Ec = = 5700
B. Ec = = 570
C. Ec = = 5700fck
D. Ec = where fck n/mm2 = 700 is the characteristic strength in
As compared to ordinary portland cement, use of pozzuolanic cement_______________?
A. Reduces workability
B. Increases bleeding
C. Increases shrinkage
D. Increases strength
Strength of concrete increases with________________?
A. Increase in water-cement ratio
B. Increase in fineness of cement
C. Decrease in curing time
D. Decrease in size of aggregate
Workability of concrete is directly proportional to________________?
A. Aggregate cement ratio
B. Time of transit
C. Grading of the aggregate
D. All of above