长江科学院院报2024，Vol.41Issue(7)：158-162,167,6.DOI:10.11988/ckyyb.20230254
高寒地区水工建筑物环氧砂浆防护材料耐候性能及工程应用
Weather Resistance and Engineering Application of Epoxy Mortar Protective Materials for Hydraulic Structure in Alpine Regions
摘要
Abstract
In high-altitude,cold regions,hydraulic structures endure prolonged exposure to intense ultraviolet radi-ation,extreme temperatures,and freeze-thaw cycles.Consequently,they are more susceptible to cracking,leak-age,and deterioration from freeze-thaw cycles,corrosion,carbonation,steel erosion,and other factors compared to lower-altitude regions,significantly compromising project safety.To address this challenge,we investigated the weathering resistance of epoxy mortar through indoor UV wet heat aging,freeze-thaw cycles,and natural aging in Xizang autonomous region.Results revealed that the modified epoxy mortar exhibited resilience,with no cracking observed after 2000 hours of accelerated UV and wet heat aging,retaining a tensile strength of 74％.Moreover,it attained a frost resistance grade of F250.After 960 days of natural aging,minimal color change and no surface pow-dering were observed.This material was utilized for surface protection and repair in the spillway tunnel stilling pool of the Laluo Water Conservancy Project in Xizang autonomous region.Over four years of service,the modified epoxy mortar demonstrated exceptional resistance to freezing,ultraviolet exposure,and weathering,showcasing promising application prospects for similar projects in high-altitude and cold regions.关键词
环氧砂浆/耐候性能/水工建筑物/高寒地区/工程应用Key words
epoxy mortar/weather resistance/hydraulic structure/alpine regions/engineering application分类
建筑与水利引用本文复制引用
邵晓妹,陈亮,孙正,周璐,李娟,曾大文..高寒地区水工建筑物环氧砂浆防护材料耐候性能及工程应用[J].长江科学院院报,2024,41(7):158-162,167,6.基金项目
水利部重大科技项目(SKS-2022106) （SKS-2022106）
水利技术示范项目(SF-202301) （SF-202301）
