Outdoor Aging Performance of HDPE Geogrid  

作　　者：TONG Jun DING Jin-hua SUN Hui 

机构地区：[1]Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Yangtze River Scientific Research Institute,Wuhan 430010,China

出　　处：《长江科学院院报》2018年第4期88-90,108,共4页Journal of Changjiang River Scientific Research Institute

基　　金：National Key R&D Program of China(2017YFC1501201);National Natural Science Foundation of China(51709017);Fundamental Research Fund for Central Research Institute(CKSF2014060/YT,CKSF2017009/YT,CKSF2017012/YT,CKSF2017022/YT)

摘　　要：An outdoor aging test base for geosynthetics was established in Wuhan,central China to investigate the long-term aging performance of geosynthetics. Outdoor photo-oxygen aging tests for high density polyethylene(HDPE) geogrid have been carried out in the base. Test results show that in the initial nine months,the tensile strength of geogrid remains unchanged or even gets larger,while the corresponding strain at break decreases slightly,exhibiting hard and brittle trend due to secondary compensatory responses to the ultraviolet(UV) aging: UV provides the required chemical crosslinking energy,resulting in the polymer crosslinking reaction. Tensile strength of the geogrid increases by about 5% in the initial nine months,but decreases after the initial nine months. The long-term research results at the test base could provide first-hand data for researching the aging properties of HDPE geogrid.An outdoor aging test base for geosynthetics was established in Wuhan,central China to investigate the long-term aging performance of geosynthetics. Outdoor photo-oxygen aging tests for high density polyethylene(HDPE) geogrid have been carried out in the base. Test results show that in the initial nine months,the tensile strength of geogrid remains unchanged or even gets larger,while the corresponding strain at break decreases slightly,exhibiting hard and brittle trend due to secondary compensatory responses to the ultraviolet(UV) aging: UV provides the required chemical crosslinking energy,resulting in the polymer crosslinking reaction. Tensile strength of the geogrid increases by about 5% in the initial nine months,but decreases after the initial nine months. The long-term research results at the test base could provide first-hand data for researching the aging properties of HDPE geogrid.

关 键 词：OUTDOOR test AGING TENSILE STRENGTH HDPE GEOGRID 

分 类 号：TU413.1[建筑科学—岩土工程]