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AASHTO M318 – Standard Specification for Glass Cullet Use for Soil-Aggregate Base Course


This specification covers processed glass cullet intended for use as a granular road base material.

When properly processed and mixed with natural or crushed aggregate, hauled to and properly spread and compacted on a prepared grade to appropriate density standards, glass cullet can be expected to provide adequate stability and load support for use as road or highway bases.

Material described in this specification is not intended to be used in treated or stabilized pavement layers.

This specification is intended for use in conjunction with M147 or with the requirements of the local jurisdiction specifying the properties of natural or crushed aggregate used in the base course. It is not intended for use in base courses in locations where surfacing will not be placed over the base.


glass; glass cullet; recycled aggregate; recycled glass