ANALYSIS OF ENVIRONMENTAL CONDITION EFFECTS OF WASTE LANDFILL ON GEOMEMBRANE PERFORMANCE

초록

The effects of acidic and alkaline solutions to be considered waste on the chemical resistance of high density polyethylene (HDPE) geomembranes (GMs) were evaluated. Damaged and intact smooth/textured specimens were immersed in acidic, alkaline and distilled water (pH=4, 12, 8 and 7), and incubated at 20, 40, 60 and 80°C respectively. Tensile stress of specimens was periodically determined by constant rate of load tensile testing apparatus while polymer structure was examined by a scanning electro-microscope. Damaged HDPE GMs showed excellent acidity-resistance as intact HDPE GMs. High temperature imparted flexibility in HDPE GMs which in turn showed lower tensile strength.