ASTM C593-19 PDF Download

The ASTM C593-19 standard is titled "Standard Specification for Fly Ash and Other Pozzolans for Use With Lime for Soil Stabilization." This specification outlines the requirements for qualifying fly ash and other pozzolans for use with lime in various types of soil stabilization applications. It includes both plastic and nonplastic mixtures, as well as other mixtures that influence the lime pozzolanic reaction.

The standard covers a range of pozzolans, including artificial pozzolans like fly ash and natural pozzolans like diatomite and pumicite. These pozzolans can be in either raw or calcined state. The qualification process involves several tests to assess the suitability of the pozzolans for the specific job or project criteria related to soil stabilization.

The specification outlines specific tests that should be conducted on the pozzolans, such as evaluating the water-soluble fraction, assessing the fineness, and measuring the lime-pozzolan strength development. For nonplastic mixtures, additional tests are required, including evaluating compressive strength development and freeze-thaw resistance. The materials must also undergo vacuum saturation strength testing.