Slurry wall backfill integrity and desiccation

Document Type

Conference Proceeding

Publication Date

8-1-1990

Abstract

Experiments were conducted to study the effect of desiccation on backfill materials consisting of a sodium bentonite, kaolinite, and sand. The permeant consisted of water, aniline, phenol, and hydrochloric acid solutions. Soil specimens subjected to drying and wetting cycles showed considerable cracking. The largest cracks were formed with phenol and the smallest with water. With increased kaolinite contents, the width and frequency of the cracks decreased. No cracks were formed with hydrochloric acid. The tests on cracked specimens indicated higher initial permeability which decreased with time and reached the same order of magnitude as uncracked specimens. Essentially all the cracks closed during the permeability tests. In the field, cracks are not likely to close and permeability is inclined to remain high or even increase if the soil in the cracks erodes.

Identifier

0025477075 (Scopus)

Publication Title

ASTM Special Technical Publication

ISSN

10403094

First Page

81

Last Page

90

Issue

1095

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