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For the following questions answer them individually
An aggregate is said to be flaky, if its least dimension is less than
$$ \frac {2} {3} $$ mean dimension
$$ \frac {1} {2} $$ mean dimension
$$ \frac {3} {5} $$ mean dimension
$$ \frac {3} {4} $$ mean dimension
The fineness of cement can be found out by sieve analysis using IS sieve number
20
10
9
6
For batching 1 : 2 : 4 concrete mix by volume the ingredients required per bag (50 kg) of cement are
100 litres of fine aggregates : 140 litres of coarse aggregates
100 kg of fine aggregates : 200 litres of coarse aggregates
70 kg of fine aggregates : 140 kg of coarse aggregates
70 litres of fine aggregates : 140 litres of coarse aggregates
Bulking is
increase in volume of sand due to moisture which keeps sand particles a part
increase in density of sand due to imputities like clay, organic matter
ramming of sand so that it occupies minimum volume
compacting of sand
The concrete cubes are prepared, cured and lested according to Indian Standards code number
IS : 515
IS : 516
IS : 517
IS : 518
Workability of concrete for a given water content is good if the aggregates are
angular aggregates
flaky aggregates
rounded aggregates
irregular aggregates
Generally, strength of concrete is considered negligible/very low in
Compression
Tension
Fatigue
None of the above
As the cement sets and hardens, it generates heat. This is called
Heat of hydration
Latent heat
heat of vaporisation
Sensible heat
In concrete, while hand mixing is adopted excess cement to be added is
4 %
10 %
14 %
20 %
For constructing road pavements, the type of cement generally used is
ordinary Portland cement
rapid hardening cement
low heat cement
blast furnace slag cement
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