Fineness test
Consistency test
Test for setting time
Test for tensile strength
B. Consistency test
Smaller creep and shrinkage
Greater density and smaller permeability
Improved frost resistance
All the above
Elastic shortening of concrete
Shrinkage of concrete
Creep of concrete
Loss due to friction
About 0.1 N/mm²
Zero
0.3 N/mm² to 0.7 N/mm²
About 1.0 N/mm²
Siliceous aggregates, has higher co-efficient of expansion
Igneous aggregates, has intermediate coefficient of expansion
Lime stones, has lowest co-efficient of expansion
All the above
Tonnes/cubic metre
kg/cubic metre
kg/litre
g/cm3
Construction joints are necessarily planned for their locations
Expansion joints are provided to accommodate thermal expansion
Construction joints are provided to control shrinkage cracks
All the above
1 : 1 : 2
1 : 2 : 4
1 : 3 : 6
1 : 4 : 10
20 mm to 30 mm
30 mm to 40 mm
40 mm to 50 mm
50 mm to 60 mm
0
10
20
30
3
4
5
7
Has strength less than 10% to 15%
Has more resistance to weathering
Is more plastic and workable
Is free from segregation and bleeding
Bleeding
Creeping
Segregation
Shrinkage
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
Economy
Durability
Workability
All the above
At the middle of the wall
At the edge of the wall
Halfway between the middle and edge of the wall
At a distance equal to effective depth of footing from the edge of the wall
Reduces workability
Increases bleeding
Increases shrinkage
Increases strength
Single sized aggregates
Two sized aggregate
Graded aggregates
Coarse aggregates
Less
More
Equal
None of the above
0.15% to 2%
0.8% to 4%
0.8% to 6%
0.8% to 8%
30 minutes
40 minutes
60 minutes
90 minutes
Contraction joint
Expansion joint
Construction joint
Both (a) and (b)
10 cm
15 cm
20 cm
25 cm
Rapid rate during the first few days and afterwards it continues to increase at a decreased rate
Slow rate during the first few days and afterwards it continues to increase at a rapid rate
Uniform rate throughout its age
None of these
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
Capacity of column is decreased
Ductility of column reduces
Capacity of column is decreased but ductility of column increases
Both the capacity of column and ductility of column increase
Volume of water to that of cement
Weight of water to that of cement
Weight of concrete to that of water
Both (a) and (b) of the above
Decrease in early strength
Reduction in chemical action with sulphates
Increase in shrinkage
All the above
Calcium chloride acts as a retarder
Calcium chloride acts as an accelerator
Gypsum (calcium sulphate) acts as a retarder
Both (b) and (c)
20 mm particles
10 mm particles
4.75 mm particles
All the above
20.5 mm
30.5 mm
40.5 mm
50.5 mm