Crushed limestone has several important advantages over river gravel as an aggregate for concrete. First, for a given amount of cement in the mix, crushed limestone concrete will have an approximately 10% strength advantage. ... Additionally, crushed limestone concrete is easier to saw through than gravel concrete.

Why is limestone used as aggregate?

... Sedimentary rocks especially carbonate rocks such as limestone and dolomite ubiquitously used as aggregates. Limestones are used for aggregates with good strength, low possibility of alkali-silica reaction and reduce the drying shrinkage in concrete (Carlos et al., 2010) .

Which stone is best for aggregate?

In many places, good limestone, granite, marble or other quality stone bedrock deposits do not exist. In these areas, natural sand and gravel are mined for use as aggregate.