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Polyurea Geomembranes High Performance Seamless Liners

Although polyurea geomembranes have been successfully used in the market for several years, technical information and performance evaluations are virtually nonexistent. Furthermore, when referring to construction specifications for polyurea geomembranes, physical properties of the coating and geotextile are listed rather than those of the geomembrane. Polyurea geomembranes have unique properties, and they deserve the same comprehensive testing and reporting as the components used to form them.

Product Number: 41208-430-SG
Author: Robert M. Loomis
Publication Date: 2008
Industry: Coatings
$0.00
$20.00
$20.00

Although polyurea geomembranes have been successfully used in the market for several years, technical information and performance evaluations are virtually nonexistent. Furthermore, when referring to construction specifications for polyurea geomembranes, physical properties of the coating and geotextile are listed rather than those of the geomembrane. Polyurea geomembranes have unique properties, and they deserve the same comprehensive testing and reporting as the components used to form them. In this study, properties of polyurea geomembranes based on different geotextiles are reported and their unique characteristics are contrasted with traditional thermoplastic liners. Woven, nonwoven, and spunlaid geotextiles of different weights were used to create the polyurea geomembranes, which were mechanically tested in two orientations. In addition, mechanical properties of these polyurea geomembranes were evaluated according to methods for elastomeric coatings and compared to methods for coated fabrics. The peel adhesion between the polyurea coating and geotextile was measured for each polyurea geomembrane, which revealed an unexpected high result for a woven polypropylene geotextile. High-resolution images of the polyurea/geotextile interface showed how the individual components interact to form a geomembrane. The polyurea geomembranes exhibited low permeability to water, as well as greater tensile strength, puncture resistance, and tear resistance than traditional thermoplastic liners.

Although polyurea geomembranes have been successfully used in the market for several years, technical information and performance evaluations are virtually nonexistent. Furthermore, when referring to construction specifications for polyurea geomembranes, physical properties of the coating and geotextile are listed rather than those of the geomembrane. Polyurea geomembranes have unique properties, and they deserve the same comprehensive testing and reporting as the components used to form them. In this study, properties of polyurea geomembranes based on different geotextiles are reported and their unique characteristics are contrasted with traditional thermoplastic liners. Woven, nonwoven, and spunlaid geotextiles of different weights were used to create the polyurea geomembranes, which were mechanically tested in two orientations. In addition, mechanical properties of these polyurea geomembranes were evaluated according to methods for elastomeric coatings and compared to methods for coated fabrics. The peel adhesion between the polyurea coating and geotextile was measured for each polyurea geomembrane, which revealed an unexpected high result for a woven polypropylene geotextile. High-resolution images of the polyurea/geotextile interface showed how the individual components interact to form a geomembrane. The polyurea geomembranes exhibited low permeability to water, as well as greater tensile strength, puncture resistance, and tear resistance than traditional thermoplastic liners.

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