Full Name

ASTM C593 – Standard Specification for Fly Ash and Other Pozzolans for Use With Lime for Soil Stabilization


This specification covers the qualification of fly ash and other pozzolans for use with lime in plastic, nonplastic mixtures and other mixtures that affect lime pozzolanic reaction required by soil stabilization.

Evaluation of pozzolans containing available lime, such as Class C fly ash, is given consideration. Pozzolans covered include artificial pozzolans such as fly ash, and natural pozzolans, such as diatomite and pumicite, in either raw or calcined state.


compressive strength; fly ash; freeze-thaw resistance; lime; pozzolan; soil stabilization