| 초록 |
The objective of this paper is to detail the design of new laboratory equipment to simulate the ageing of geosynthetics under chemical exposure, elevated temperatures and applied stresses and to get an idea of tensile properties change of high density polyethylene (HDPE) geomembranes (GM) after exposure to different pH condition under stress at elevated temperature. Commercially available HDPE smooth and textured surfaced GM was tested. It was exposed to pH 4 and pH 12 buffer solution under their different yield stress at 50º C for 1000~1200 hours. In this experiment, stress was variable. It has been noticed that as the applied stress increases, residual tensile strength decreases. It can be said that residual tensile strength is inversely proportional to exposed stress. As the temperature was constant, it is seen that HDPE GM is more resistant to acidic condition than alkaline condition and residual tensile strength is inversely proportional to exposed stress. |
