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Waste Management & Research, Vol. 14, No. 2, 105-124 (1996)
DOI: 10.1177/0734242X9601400202

Multi-Axial Testing of Geomembranes

P.M. Goldsmith

Engineering-Science Inc., 57 Executive Park South, Atlanta, GA 30329, U.S.A.

R.I. Stessel

Department of Civil Engineering and Mechanics, University of South Florida, Tampa, FL 33620-5350, U. S. A.

There are many accepted methods to ascertain the integrity of a geomembrane (GM) by subjecting it to a battery of physical, mechanical and chemical tests. However, there is no single comprehensive performance testing programme that simulates the stresses to which a GM might be subjected in a service environment. This paper first discusses the development and testing of a new test system based on multi-axial deformation; observations concerning system design criteria and relevance to field conditions are made. The paper also presents the results of a physical testing programme, wherein standard materials tests were implemented using the new system; stress/strain, strain rate, creep and relaxation data are presented. Where comparisons were possible, these results reinforced fluid-based multi-axial testing data in the literature. New data and conclusions are discussed. Finally, a new test, cyclic testing, is suggested, demonstrated and discussed. © 1996 ISWA

Key Words: Landfill • land disposal • liner materials • geomembranes • materials strength • cyclic testing • waste disposal • solid waste • hazardous waste.


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