A. segregation
B. compaction
C. shrinkage
D. bulking
0
Approximate value of shrinkage strain in concrete, is________________?
0
Workability of concrete is directly proportional to________________?
A. 0.003
B. 0.0003
C. 0.00003
D. 0.03
0
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________?
A. aggregate cement ratio
B. time of transit
C. grading of the aggregate
D. all of above
0
Strength of concrete increases with________________?
A. tcr – rcs = tct
B. fcr>fcs>fc
C. fcr<fcs
D. fc5>fcr>fC
0
As compared to ordinary portland cement, use of pozzuolanic cement_______________?
A. increase in water-cement ratio
B. increase in fineness of cement
C. decrease in curing time
D. decrease in size of aggregate
0
According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm2) can be taken as______________?
A. reduces workability
B. increases bleeding
C. increases shrinkage
D. increases strength
0
The most commonly used admixture which prolongs the setting and hardening time is_______________?
A. Ec = = 5700
B. Ec = = 570
C. Ec = = 5700fck
D. Ec = where fck N/mm2 = 700 is the characteristic strength in
0
The strength of concrete after one year as compared to 28 days strength is about_______________?
A. gypsum
B. calcium chloride
C. sodium silicate
D. all of the above
0
Admixtures which cause early setting, and hardening of concrete are called_______________?
A. 10 to 15% more
B. 15 to 20% more
C. 20 to 25% more
D. 25 to 50% more
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