10-14-2014, 11:04 AM
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.
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.