Can I change AC-14 to AC-20??

[msesi]

I'm currently carrying asphalt concrete works by the use of AC-14.The Contractor claims that the size of the stone 14mm diameter used as maximamum seems to be very small compared to the type of vehicle passing over it.The vehicles are very heavy.The Contractor proposes to used 2omm seze aggregate as a maximum,AC-20 can I allow him to proceed with AC-20 instead opf AC-14???Please assist.

 

[Compositepro]

Your question is in the wrong forum. Try Geotechnical or structural.