水力发电学报2024，Vol.43Issue(6)：53-62,10.DOI:10.11660/slfdxb.20240606
变温条件下胶粉改性沥青混凝土抗裂特性研究
Anti-cracking characteristics of crumb rubber-modified asphalt concrete under variable temperature conditions
摘要
Abstract
This paper studies the cracking resistance of crumb rubber-modified asphalt concrete(CRMAC)under variable temperature conditions in water conservancy engineering environment,based on the small beam bending test and the brittleness index of full stress-strain curves.The results show that at the optimum performance,the ratio of CRMAC cracking resistance is 80M at a crumb rubber dosage of 20%.Under low temperature conditions,the bending strength and peak strain of CRMAC are better than those of matrix asphalt concrete;the lower the temperature,the larger the brittleness index of asphalt concrete,and the more prone to cracking of the specimen.Adding crumb rubber reduces the brittleness index of matrix asphalt concrete and improves its cracking resistance;it also changes the stress state of matrix asphalt concrete at-10℃,and changes the stress-strain curve from brittle to plastic characteristics.This study provides new approaches for panel material selection.关键词
胶粉/水工沥青混凝土/变温/脆性指标Key words
crumb rubber/hydraulic asphalt concrete/variable temperature/brittleness index分类
水利科学引用本文复制引用
付涵,柴军瑞,许增光,耿凯强,王奕璇..变温条件下胶粉改性沥青混凝土抗裂特性研究[J].水力发电学报,2024,43(6):53-62,10.基金项目
国家自然科学基金重点项目(52039008) （52039008）
国家自然科学基金项目(51679197) （51679197）
陕西省创新团队(2022TD-01) （2022TD-01）
