I was wondering if anyone out there knew the proper procedure for applying 1.5quot; of asphalt to a soil cement subgrade? I dont know if a tack coat is needed or not. Right now we are planning on a fresh broom finish and a single application of asphalt. Its a low use parking lot but I want to make sure we are doing this right.Thanks!
we do soil-cement base with AC or HMA surface all the time. Never use a tack coat. The thinking is have a slip plane between the two sections. Tack coat would allow the subbase to telegraph cracks up into the AC. The key is to have the right soil-cement mix at optimal moisture. Too much water will result in shrinkage cracks. With only 1.5 inch AC that could be a problem. How did you come up with a soil-cement mix design? How much cement? how thick in your section? good luck! Don the engineer
