Stone Gravel/Coarse Aggregates - Selection during Construction
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Stone Gravel/Coarse Aggregates - Selection during Construction

Coarse aggregates are normally small pieces of stone which give concrete its strength. The two most commonly used sizes are ¾ inch or 20 mm and ½ inch or 12 mm. At times both are used together in the ratio of 60:40 or even up to 70:30.

While selecting the coarse aggregate, the following points should be kept in mind:
> Coarse aggregate should be solid, in the shape of a cube and free from dirt.
> Any form of contamination should be immediately removed.
> The right proportion of large and small size pieces should be selected. This is to ensure that the space between the large stonechips is filled in by the smaller pieces.
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Stone Gravel/Coarse Aggregates - Selection during Construction - by sunil zende - 10-14-2014, 11:04 AM

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