土工膜
聚丙烯
材料科学
复合材料
环境科学
废物管理
工程类
作者
Sandarva M. Sharma,Kuo Tian,Burak F. Tanyu
标识
DOI:10.1016/j.geotexmem.2022.10.006
摘要
This study focused on evaluating the longevity of Atactic Polypropylene (APP) used as a geomembrane (GM) to line ponds that collect runoff water from salt handling facilities. Samples of APP were exhumed from the ponds that have been in service for 6-, 25-, and 44-years and evaluated in the laboratory. Tests were conducted to analyze the surface cracks and textures, tensile properties, puncture resistance, and ability to hold water (permeability). Control tests were conducted with virgin APP GM. Results were compared based on the difference in the age of the APP, location of where the APP samples were obtained within the side slope of the pond (i.e., submerged, and above water level), and orientation of the side slope in relation to the sun (e.g., east, west, north, or south). Based on the field observations and laboratory evaluations, it was determined that exposure to sunlight accelerates the degradation more so than the chemical degradation that occurs due to the salt content within the pond water. The samples exhumed from the north slope (south-facing) had more severe degradation due to high solar radiation energy deposition. • This study focused on evaluating the longevity of APP GM used as pond liner to collect runoff in salt handling facilities. • APP GM were exhumed from the salt ponds after 6-, 25-, and 44-years service. • GMs were investigated by performing image analysis, tensile, puncture resistance, and permeability tests, and FTIR analysis. • APP GMs exhumed from region above water showed faster degradation than GMs exhumed from region below water at the same pond. • APP GMs exhumed from the north slope (south-facing) had the severe decay than the samples exhumed from the other slopes.
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