What is Aggregate?
In the minerals industry, aggregate (PDF format) refers to a bulk material made up of individual particles or fragments. Sand and gravel and crushed stone are the most common aggregate materials in Maine. In recent years, sand and gravel have accounted for about 70% of aggregate production statewide, with crushed stone accounting for the remaining 30%. Aggregate is used for many construction purposes, including road and building foundations, fill, surface drainage systems, and asphalt road surface material.
