All asphalt is black. When stone is mixed together with hot asphalt cement, the mass of material becomes black. Over time, as the asphalt oxidizes, the coating on the aggregates breaks down and the color of the aggregate starts to show through.
All asphalt is black. When stone is mixed together with hot asphalt cement, the mass of material becomes black. Over time, as the asphalt oxidizes, the coating on the aggregates breaks down and the color of the aggregate starts to show through.