Asphalt aggregate is a crushed rock that typically makes up the majority, by weight, of the asphalt mix design. It is usually crushed and screened into a minimum of three different aggregate size piles, called stockpiles, that are metered into the asphalt plant at varying amounts to achieve the desired cumulative gradation in the Hot Mixed Asphalt. Typically, these piles will be sorted into sizes such as ¾” – ½”, ½” – ¼”, ¼”-#10 and #10-0