Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

Over the last decade, there has been increased attention aimed toward the use of coal combustion products in geotechnical applications. Several studies have been completed to determine the properties of bottom ash from burning of pulverized coal, amended with admixtures such as bentonite, clay, and lime. Because of significant volume change characteristics of bentonite, soils or similar granular materials amended with it should be evaluated for their swelling behavior. A study recently conducted on bottom ash has shown that strength and stiffness characteristics of bottom ash amended with bentonite change significantly with the curing of the mixture. Therefore, this study was initiated to investigate the effect of curing and moisture content on the swelling characteristics of pulverized coal combustion bottom ash amended with bentonite. Bottom ash samples containing 20 percent bentonite and prepared at 16 and 18 percent initial moisture content were tested in this investigation. Results presented show that curing and initial moisture content of the mixtures have significant effect on the swelling potential of bottom ash-bentonite mixtures.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Effect of Curing Time and Moisture Content on Swelling Potential of Bottom Ash-Bentonite Mixtures

New York, New York

Over the last decade, there has been increased attention aimed toward the use of coal combustion products in geotechnical applications. Several studies have been completed to determine the properties of bottom ash from burning of pulverized coal, amended with admixtures such as bentonite, clay, and lime. Because of significant volume change characteristics of bentonite, soils or similar granular materials amended with it should be evaluated for their swelling behavior. A study recently conducted on bottom ash has shown that strength and stiffness characteristics of bottom ash amended with bentonite change significantly with the curing of the mixture. Therefore, this study was initiated to investigate the effect of curing and moisture content on the swelling characteristics of pulverized coal combustion bottom ash amended with bentonite. Bottom ash samples containing 20 percent bentonite and prepared at 16 and 18 percent initial moisture content were tested in this investigation. Results presented show that curing and initial moisture content of the mixtures have significant effect on the swelling potential of bottom ash-bentonite mixtures.