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Laboratory Measurement of the Linear Thermal Expansion of Geomembranes Using a Dynamic Mechanical Analyzer (DMA)
Thermal expansion is a critical property of geomembranes as it can affect the formation of wrinkles during their installation as well as for exposed applications. When an excessive number of wrinkles has developed because of an excessive dilatation of the geomembrane, these wrinkles may become interconnected, which increases the risk and extent of leakage. This paper introduces the test procedure that should be followed to permit the evaluation of thermal expansion characteristics of geomembranes using a dynamic mechanical analyzer. It is shown that the test should be conducted with low applied stress and very low heating rate. In addition, the effect of the specimen width and length is analyzed. Finally, differences in behavior between machine and cross direction are characterized. Overall, it is concluded that this technique provides an effective tool for measuring the linear thermal expansion of geomembranes under conditions simulating their use in the field.
Laboratory Measurement of the Linear Thermal Expansion of Geomembranes Using a Dynamic Mechanical Analyzer (DMA)
Thermal expansion is a critical property of geomembranes as it can affect the formation of wrinkles during their installation as well as for exposed applications. When an excessive number of wrinkles has developed because of an excessive dilatation of the geomembrane, these wrinkles may become interconnected, which increases the risk and extent of leakage. This paper introduces the test procedure that should be followed to permit the evaluation of thermal expansion characteristics of geomembranes using a dynamic mechanical analyzer. It is shown that the test should be conducted with low applied stress and very low heating rate. In addition, the effect of the specimen width and length is analyzed. Finally, differences in behavior between machine and cross direction are characterized. Overall, it is concluded that this technique provides an effective tool for measuring the linear thermal expansion of geomembranes under conditions simulating their use in the field.
Laboratory Measurement of the Linear Thermal Expansion of Geomembranes Using a Dynamic Mechanical Analyzer (DMA)
Beaumier, David (author) / Dolez, Patricia I. (author) / Blond, Eric (author)
Geotechnical Frontiers 2017 ; 2017 ; Orlando, Florida
Geotechnical Frontiers 2017 ; 227-235
2017-03-30
Conference paper
Electronic Resource
English
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