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For the following questions answer them individually
The strength and quality of concrete, depends upon:
grading of aggregates
surface area of aggregates
shape of aggregates
All option are correct
The process of adding water to lime to convert it into a hydrated lime is termed as:-
watering
baking
hydration
slaking
If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60 mm, the aggregates will be known as elongated aggregate if its length is not less than
81.5 mm
91.5 mm
101.5 mm
121.5 mm
The calcination of pure lime result in:-
quick lime
hydraulic lime
hydrated lime
fat lime
Pick up the correct statement from the following
An increase in water content must be accompanied by an increase in cement content
Angular and rough aggregates reduce the workability of the concrete
Large size aggregates increase the workability due to lesser surface area
According to I.S. 456, the number of grades of standard concrete mixes are
3
5
6
7
Curing a concrete for long period ensures better
volume stability
strength
water resistance
The main object of compaction of concrete is
to eliminate air holes
to achieve maximum density
to provide intimate contact between the concrete and embedded materials
Construction joints are provided
where B.M and S.F are small
where the member is supported by other member
at 18 m apart in huge structures
Construction joints are necessarily planned for their locations
Expansion joints are provided to accommodate thermal expansion
Construction joints are provided to control shrinkage cracks
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