Swelling-shrinkage properties and soil improvement of compacted expansive soil, Ning-Liang Highway, China

In this paper, the swelling-shrinkage properties of the compacted expansive soil in the Huaiyin Section of the Ning-Lian Highway are introduced, and s welling-shrinkage mechanisms are discussed based on changes in soil water c ontent, dry density, material composition and fabric. The improvement of th e compacted expansive soil by lime is also discussed briefly. It is conclud ed that careful attention should be paid to this type of compacted expansiv e soil. (C) 1998 Elsevier Science B.V. All rights reserved.