Effect of specific gravity on concrete is given below:
- If the specific gravity of aggregate which we use to produce concrete is less than aggregate which we use in trial before to produce concrete in this case water requirement for concrete is more than trial to meet slump criteria due to which water cement ratio high and result less strength.
- In the case of low specific gravity we require more quantity of cement in mix to meetc strength criteria explaination : Let we have two types of aggregate 1) Low specific gravity 2) High specific gravity.
fill 1m3 box with these both aggregate,
we see that for same mass number of
aggregate in the case of low specific
gravity is more than high specific gravity aggregate .
Hence number of aggregate more surface area of aggregate more due to this cement paste require to cover the surface of aggregate is more and water requirement more.
- If specific gravity of aggregate less than aggregate use in trial than in this case volume of concrete more I. e yield of concrete more because in this case volume of water maximum.
- If specific gravity of aggregate less it require more space in stock yard in comparison of high specific gravity of aggregate.
- If specific gravity less density of concrete also less and vise versa.
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