Swell‐Shrink Behavior of Compacted Clay
Publication: Journal of Geotechnical Engineering
Volume 120, Issue 3
Abstract
The results of this study show that the initial amount of swell and shrinkage for a clay compacted at a moisture content that was 6% wet of modified Proctor optimum was small. By allowing the compacted silty clay to cure, bonds were developed that further reduced the amount of initial swell and shrinkage. But after repeated wetting and drying cycles, the amount of expansion and shrinkage dramatically increased. Whatever effect compaction at a high moisture had was destroyed by wetting and drying cycles. In terms of practical applications, for a clay compacted over optimum and protected from wetting and drying cycles, aging may result in the development of bonds that substantially reduce long‐term swell. But if the compacted clay should dry out prior to placing the foundation, or if the clay is subjected to wetting and drying cycles, the beneficial effect of compacting the clay at a high moisture content will be destroyed, causing the soil to become significantly more expansive.
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Copyright © 1994 American Society of Civil Engineers.
History
Received: Nov 6, 1991
Published online: Mar 1, 1994
Published in print: Mar 1994
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