Doctoral Dissertations

Keywords and Phrases

Expansive clay

Abstract

"Expansive clay soils have caused significant damage throughout the world. Chemical stabilizing agents have been used to reduce the swelling potential of expansive clay soils. However, how chemically treating soils affects the matric and osmotic suction of soils has not been investigated. Therefore, this research focused on the soil suction and swell behavior of chemically treated clay.

Two subject soils were chosen. One was from Irving, Texas with high swell potential. The other one was from Slater, Missouri with moderate swell potential. Hydrated lime and KIS (solution containing Potash and Ammonium Lignonsulfurnate) were used as chemical stabilizers. The basic physical and chemical properties and swell potential of selected soils before and after reacting with chemical stabilizers were determined. Also, the soil total suction, matric suction and osmotic suction were determined using a WP4 Dewpoint Potentiameter (WP4), the filter paper method and the electrical conductivity probe. Matric suction arises from capillary forces, soil texture, and adsorption forces of clay particles. Osmotic suction results from the balance of salt concentrations in soil water. When soils were reacted with chemical stabilizers, the osmotic suction dramatically increased due to the ion concentrations in the soil. However, osmotic and matric suctions and their effects on behavior of chemically treated clay have never been investigated before.

This research verified a practical method to determine osmotic and matric suction and determined the swell potential of the chemically treated soils, and correlated these with the soil suction and other soil properties"--Abstract, page iii.

Advisor(s)

Petry, Thomas M.

Committee Member(s)

Stephenson, Richard Wesley
Luna, Ronaldo
Rogers, J. David
Wronkiewicz, David J.

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

Ph. D. in Civil Engineering

Sponsor(s)

University of Missouri--Rolla. Department of Civil, Architectural and Environmental Engineering
Decagon Devices
University Testing Center
Hayward Baker Company

Publisher

University of Missouri--Rolla

Publication Date

Summer 2005

Pagination

xvii, 228 pages

Note about bibliography

Includes bibliographical references (pages 224-227).

Rights

© 2005 Cheng-Ping Jiang, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Subject Headings

Soil mechanicsSoil stabilizationSwelling soilsSoil conditioners

Thesis Number

T 8826

Print OCLC #

69659711

Electronic OCLC #

905852574

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