Rock coarse aggregates are rocks greater than 4.75mm. The most common size of aggregate used in construction is 20mm. When it comes to coarse aggregate it is a very crucial material for preparing concrete. Concrete performance such as frost resistance, permeability resistance, drying shrinkage, and durability are all closely related with aggregate. Rock can be divided into three types: sedimentary, igneous, and metamorphic (not used). Each type has a different impact on concrete.
Take Sedimentary, for example. Limestone is used in concrete and is the most typical sedimentary rock used. Igneous rock has the rocks that are most common in concrete. There is coarse-grained granite, basalt, andesite, and diabase. Andesite is a dark gray rock that is one of the most commonly used aggregates in concrete. Diabase is formed by the condensation of volcanic magma under deep geological formations and has green in its color. This rock is also very commonly used aggregate in concrete.