Crusher dust, also known as blue metal, cracker or more commonly, rock dust, is simply the material leftover when making crushed rock. As rocks are run through the crusher, tiny pieces and dust particles are left behind. Instead of being thrown out as waste material, the dust is recycled and becomes a valuable product with many practical applications in both commercial construction and home projects.
Crusher dust works well as a base layer under concrete slabs, water tanks, piping, and anything that will be paved or covered over. For more information, check out our article on the applications of crusher dust.