Title

Suppression of sulfate attack on a stabilized soil

Document Type

Article

Publication Date

6-1-2005

Abstract

A soil containing calcium sulfates was stabilized at 40°C, with ample moisture, by cementitious mixtures producing a range of calcium hydroxide upon hydration. Maximum expansion occurred when the stabilizing agent was lime, whereas a mixture containing portland cement, Class C fly ash, and an amorphous silica stopped the expansion. X-ray diffraction peak width and scanning electron microscopy (SEM) based image analysis showed that maximum expansion correlated with crystallization of colloidal ettringite. Ettringite was seen by SEM within an hour of mixing the soil with lime. Colloidal ettringite was not observed when portland cement, with supplementary cementing materials, was used for stabilization.

Publication Source (Journal or Book title)

Journal of the American Ceramic Society

First Page

1600

Last Page

1606

This document is currently not available here.

COinS