Prediction of the Service Life of Composite Geomembrane Based on Hygrothermal Aging Test

Abstract

By studying the mechanical property of 150g/m2-0.3mm-150g/m2 composite geomembrane under four kinds of temperature and humidity conditions, the variation of tensile strength and elongation of the composite geomembrane with aging time is analyzed. Based on the Arrhenius thermal aging accelerated model, the tensile strength is reduced to 20% of the initial performance as a failure criterion. The hygrothermal accelerated aging prediction model of composite geomembrane is established, and the service life of the composite geomembrane in natural environment is predicted.