0.43 d
0.55 d
0.68 d
0.85 d
A. 0.43 d
Water content and its temperature
Shape and size of the aggregates
Air entraining agents
All the above
Contraction joint
Expansion joint
Construction joint
Both (a) and (b)
Single size coarse aggregate is roughly 0.45
Graded coarse aggregate is roughly 0.040
Fine aggregate is roughly 0.45
All the above
Has strength less than 10% to 15%
Has more resistance to weathering
Is more plastic and workable
Is free from segregation and bleeding
Admixtures accelerate hydration
Admixtures make concrete water proof
Admixtures make concrete acid proof
Admixtures give high strength
10 mm
15 mm
25 mm
13 mm
Air-entraining agent
Foaming agent
Oily-agent
All the above
100 m
200 m
300 m
400 m
Water cement paste hardens due to hydration
During hardening cement binds the aggregates together
Cement provides strength, durability and water tightness to the concrete
All the above
10 %
20 %
30 %
40 %
2.5 cm
5.0 cm
7.5 cm
10 cm
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
Coarse aggregates
Fine aggregates
Neither (a) nor (b)
Both (a) and (b)
Fly ash
Hydrated lime
Calcium chloride
All the above
Low-heat Portland cement
Rapid hardening Portland cement
Portland blast slag cement
Portland pozzolana cement
Reacts fast with water
Generates less heat of hydration
Causes initial setting and early strength of cement
Does not contribute to develop ultimate strength
Rounded aggregate
Irregular aggregate
Angular aggregate
Flaky aggregate
Is always less than 1
Is always greater than 1
Can be more than 1
Can be less than 1
Decrease in early strength
Reduction in chemical action with sulphates
Increase in shrinkage
All the above
3.5 m
4 m
4.5 m
5 m
Magnesium oxide
Iron oxide
Silica
Lime
100 kg/cm2
150 kg/cm2
200 kg/cm2
300 kg/cm2
Tonnes/cubic metre
kg/cubic metre
kg/litre
g/cm3
Water proof masonry walls
Water proof roof
Few windows which remain generally closed
All the above
Crushing strength
Impact value
Abrasion resistance
Water absorption
Rounded
Elongated
Angular
All of the above
fcr - fcs = fcl
fcr > fcs > fcl
fcr < fcs < fcl
fcs > fcr > fcl
20 m
30 m
45 m
60 m
Zero
Tensile
Compressive
Tensile or compressive
0.15% to 2%
0.8% to 4%
0.8% to 6%
0.8% to 8%