STANDARD SPECIFICATION P-209 Crushed Aggregate Base .Crushed Aggregate Base Course. DESCRIPTION. 1.1. This item shall consist of a base course composed of crushed aggregates constructed on the prepared.crushed aggregate base course,crushed aggregate base course,item p-209 crushed aggregate base course - Maryland Aviation .209-1.1 This item consists of a base course composed of crushed aggregates constructed on a prepared course in accordance with these specifications and in.
Asphalt Treated Base (ATB) | Washington Asphalt Pavement .
Asphalt treated base (ATB) is a dense-graded HMA with a wide gradation band and lower asphalt content intended for use as a stabilizing base course. ATB costs . The minimum recommended crushed aggregate base thickness is 4 inches.