Aggregates. Sand, Gravel and Crushed Stone. Aggregates, which consist of crushed stone, sand, and gravel, are among the most abundant natural resources and are a vital raw material used by construction, agriculture, and industry. Aggregates are fundamental to our lifestyle. Imagine our lives without roads, bridges, streets, bricks, concrete ...Recycled Asphalt Portland, Salem, Eugene, Gresham ...Recycled Asphalt Pavement will not replace the quality or reproduce the same characteristics of traditional hot-mix asphalt. It is a crushed/milled asphalt product the surface rock will become loose more-so in areas of high speed & curves.