中外公路2025，Vol.45Issue(2)：73-82,10.DOI:10.14048/j.issn.1671-2579.2025.02.008
路基填料建筑固废混凝土的力学特性及颗粒破碎研究
Research on Mechanical Properties and Particle Crushing of Construction Solid Waste Concrete as Subgrade Filler
摘要
Abstract
Construction solid waste is often used as subgrade filler,and its mechanical properties are greatly affected by moisture content and compaction degree.To explore the influence of these factors on the mechanical and particle crushing performance of construction solid waste,laboratory large-scale direct shear tests and particle screening tests were conducted.This study analyzed samples with varying moisture content and compaction degrees under a certain maximum dry density.The large-scale shear tests were carried out under three normal stress conditions:50 kPa,100 kPa,and 150 kPa,and the particle crushing characteristics of construction solid waste before and after shearing were analyzed.The results reveal notable changes in particle crushing form of the section before and after shearing of construction solid waste,which can be categorized into three types:rupture,abrasion,and grinding.The shear stress-shear displacement curve shows a"jumping"phenomenon.The cohesion of construction solid waste increases with the decrease in moisture content or the increase in compaction degree.Similarly,the internal friction angle rises with decreased moisture content or a higher degree of compaction.The overall screening statistics of construction solid waste show that the particle gradation curve moves upward,and the relative crushing rate of particles increases as moisture content decreases,or compaction degree increases.关键词
建筑固废/路基填料/力学特性/颗粒破碎Key words
construction solid waste/subgrade filler/mechanical property/particle crushing分类
交通工程引用本文复制引用
于楠,宋杨,秘贝,李雪健,齐子怡..路基填料建筑固废混凝土的力学特性及颗粒破碎研究[J].中外公路,2025,45(2):73-82,10.基金项目
国家自然科学基金资助项目(编号:51978237) （编号:51978237）
河北省高等学校科研重点项目(编号:ZD2021068) （编号:ZD2021068）
河北水利电力学院基本科研业务费重点培育项目(编号:SYKY2302) （编号:SYKY2302）
河北省大学生科技创新能力培育专项 （）
