Tricalcium silicate (C3S) hydrates rapidly
Tricalcium silicate (C3S) generates more heat of hydration
Tricalcium silicate (C3S) develops early strength
Tricalcium silicate (C3S) has more resistance to sulphate attack
D. Tricalcium silicate (C3S) has more resistance to sulphate attack
Decrease in tensile strength but increase in ductility
Increase in tensile strength but decrease in ductility
Decrease in both tensile strength and ductility
Increase in both tensile strength and ductility
Chemically inert
Sufficiently strong
Hard and durable
All the above
5% by weight of aggregates plus 20% of weight of cement
10% by weight of aggregates plus 10% of weight of cement
5% by weight of aggregates plus 30% of weight of cement
30% by weight of aggregates plus 10% of weight of cement
Reduces the shrinkage of concrete
Preserves the properties of concrete
Prevents the loss of water by evaporation
All of the above
0.207 l
0.25 l
0.293 l
0.333 l
Ordinary Portland cement
Rapid hardening cement
Low heat cement
Blast furnace slag cement
Workability of concrete
Strength of concrete
Durability of concrete
All the above
0.35 d
0.40 d
0.45 d
Dependent on grade of concrete also
Low water cement ratio
Less cement in the concrete
Proper concrete mix
All the above
Equal to the mean size
Twice the mean size
Thrice the mean size
Four times the mean size
When one thrusts one's hand into a bag of cement, one should feel warm
The colour of the cement is bluish
By rubbing cement in between fingers, one should feed rough
All the above
Ferrous sulphate
Potassium chloride
Ammonia
Nitric acid
Dry
Earth moist
Semi-plastic
Plastic
Rounded aggregate
Irregular aggregate
Angular aggregate
Flaky aggregates
Higher initial setting time but lower final setting time
Lower initial setting time but higher final setting time
Higher initial and final setting times
Lower initial and final setting times
2 %
4 %
6 %
10 %
5 %
10 %
15 %
20 %
The least lateral dimension
2 times the least lateral dimension
3 times the least lateral dimension
4 times the least lateral dimension
5 % less
10 % less
5 % more
10 % more
1100° and 1200°C
1200° and 1300°C
1300° and 1400°C
1400° and 1500°C
2/3 mean dimension
3/4 mean dimension
3/5 mean dimension
5/8 mean dimension
Water content and its temperature
Shape and size of the aggregates
Air entraining agents
All the above
100 kg
110 kg
120 kg
130 kg
Workability admixtures
Accelerators
Retarders
Air entraining agents
Smooth
Granular
Glassy
Honey combed and porous
20 mm particles
10 mm particles
4.75 mm particles
All the above
Bulking of sand is caused due to formation of a thin film of surface moisture
Fine sand bulks more than coarse sand
The volume of fully saturated sand, is equal to the volume of dry and loose sand
All the above
Depends upon the amount of water used in the mix
Does not depend upon the quality of cement mixed with aggregates
Does not depend upon the quantity of cement mixed with aggregates
All the above
Affects only the early development of strength
Affects only the ultimate strength
Both (A) and (B)
Does not affect the strength
Is proportional to water content is the mix
Is proportional to cement concrete
Increases with age of concrete
All the above