AASHTO #57 Stone Specs - Capitol Flexi-PaveAASHTO #57 stone as defined by quarries, state agencies, etc. is an . 7 stone. This material cannot be 'compacted' in a true sense, but can be properly oriented.aashto specifications for crushed stone as backfill materials,SECTION 1010 SELECT GRANULAR BACKFILL FOR . - MoDOTThis specification covers backfill material used as part of a mechanically . Aggregate used for backfill material may consist of gravel, crushed stone, . maximum density as determined by AASHTO T 99, Methods C or D (with oversize.Wet Well Lift Stations Backfill Guidelinesand crushed stone) that meets Xerxes' backfill size requirements. The. American Society for Testing and Materials (ASTM) and The. American Association of.
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