Basalt or granite ballast, coarse gravel or crushed stone used for laying the subgrade of highways or railways, primarily for railway subgrade. It is commonly used as ballast to support railway sleepers in the railway transportation system. The project involves laying a layer of ballast on the subgrade before the tracks are laid, followed by compaction, and then placing the sleepers and tracks. The use of basalt or granite ballast facilitates easy drainage and easy adjustment of track position. Additionally, as the ballast distributes the weight of the train and tracks over the subgrade, it reduces vibrations and noise caused by the train passing, thereby enhancing passenger comfort.
And both basalt or granite ballast can dissipate the vibrations and high heat generated by trains passing, maintain the gauge of the rails unchanged, prevent derailment accidents, and reduce noise. The gaps between the stones can quickly drain rainwater. Moreover, the ballast made of basalt or granite has strong permeability, which can prevent weeds from growing on the tracks.
