AASHTO #57 Stone Specs Capitol FlexiPave
AASHTO #57 Stone Specs AASHTO #57 stone as defined by quarries, state agencies, etc. is an opengraded, selfcompacting aggregate blend of size 5, 6, 7 stone. This material cannot be ''compacted'' in a true sense, but can be properly oriented with compaction equipment. This is particularly important when using #57 stone under FlexiPave surfaces.