长江科学院院报2017，Vol.34Issue(2)：13-16,4.DOI:10.11988/ckyyb.20161016
土工格栅户外老化试验初步研究
Preliminary Study on Deterioration of HDPE Geogrid from Outdoor Exposure
摘要
Abstract
As a special polymer material,geosynthetics is widely used in hydraulic,transportation and environmen-tal engineering.In its service period,the capability of maintaining mechanical properties is of vital importance to the stability of the whole project.The aging properties of geosynthetics are important for predicting the accurate life time of geosynthetics,which is a current hot research topic.Outdoor photo-oxygen aging test on HDPE geogrid was carried out at the outdoor test base of Yangtze River Scientific Research Institute.Test results showed that in the ini-tial 9 months,the tensile strength of geogrid remained unchanged or even increased due to secondary compensatory responses to the UV aging.UV provided required energy for chemical crosslinking,which resulted in the polymer crosslinking reaction and slight contraction in woven fabric.As a result,the tensile strength of geogrid increased in the initial period (9 months),but decreased after 9 months.The long-term research results of the test base could provide first-hand data for the physical and mechanical indexes of the aging properties of geogrid under outdoor ex-posure.关键词
土工格栅/HDPE/光氧/户外试验/老化性能/拉伸强度Key words
geogrid/HDPE/photo-oxidation/outdoor test/aging property/tensile strength分类
建筑与水利引用本文复制引用
童军,丁金华,胡波,孙慧..土工格栅户外老化试验初步研究[J].长江科学院院报,2017,34(2):13-16,4.基金项目
“十二五”国家科技支撑计划课题项目（2015BAB07B04）；中央级公益性科研院所基本科研业务费项目（CKSF2014060／YT， CKSF2016044／YT）；水利部土石坝破坏机理与防控技术重点实验室开放基金项目 （）
