A. segregation
B. bleeding
C. bulking
D. creep
A. time of transit
B. ‘vater-cement ratio
C. the air in the mix
D. size of aggregate
A. workability
B. strength
C. the effects of temperature variations
D. the unit weight
A. 0.33
B. 0.5
C. 0.75
D. 1.0
A. fcr=0.35Vf7
B. fcr=0.57f7
C. fcr=0.7Vf7
D. fcr=1.2Vf7
where fcr and fck are in N/mm2′
A. reduces the strength
B. increases the strength
C. does not change the strength
D. all of the above
A. workability admixtures
B. accelerators
C. retarders
D. air entraining agents
A. 10 to 15% more
B. 15 to 20% more
C. 20 to 25% more
D. 25 to 50% more
A. gypsum
B. calcium chloride
C. sodium silicate
D. all of the above
A. Ec = = 5700
B. Ec = = 570
C. Ec = = 5700fck
D. Ec = where fck N/mm2 = 700 is the characteristic strength in