建筑垃圾再生骨料对黄土路基动强度与稳定性改良研究  

Research on the improvement of dynamic strength and stability of loess subgrade by recycled aggregate from construction waste

作　　者：刘彦召 LIU Yanzhao(Beijing Urban Construction Road and Bridge Construction Group Co.,Ltd.,Beijing 250000,China)

机构地区：[1]北京城建道桥建设集团有限公司,北京250000

出　　处：《粘接》2024年第12期87-90,共4页Adhesion

摘　　要：本文利用建筑垃圾再生骨料对黄土路基进行改良,研究建筑垃圾再生骨料改良黄土路基动强度与稳定性的可行性,并对不同配比的建筑垃圾再生骨料重塑黄土进行动应力-动应变、动弹性模量、临界动应力试验,利用CT扫描仪进一步探究建筑垃圾改良黄土机理。结果表明,随再生骨料掺量增加,重塑黄土动强度得到有效改善,且当建筑垃圾再生骨料质量掺比为20%时达到最优配合比,动强度达到最大,其抗变形能力与稳定性均达到最优。同时建筑垃圾再生骨料的掺入可有效降低重塑黄土孔隙直径,最大孔隙直径较素黄土降低42.8%。研究结果可为建筑垃圾再生骨料改良黄土提供参考依据。In this paper,the loess subgrade was improved by using construction waste recycled aggregate,the feasibility of improving the dynamic strength and stability of loess subgrade was studied,and the dynamic stress-dynamic strain,dynamic elastic modulus and critical dynamic stress tests were carried out on the remodeled loess of construction waste recycled aggregate with different proportions,and the mechanism of construction waste improvement loess was further explored by using CT scanner.The results showed that the dynamic strength of the remodeled loess was effectively improved with the increase of recycled aggregate,and the optimal ratio was reached when the mass mixing ratio of recycled construction waste aggregate was 20%,the dynamic strength reached the maximum,and its deformation resistance and stability were both optimal.At the same time,the incorporation of recycled construction waste aggregate could effectively reduce the pore diameter of remodeled loess,and the maximum pore diameter was 42.8%lower than that of plain loess.The research results can provide a reference basis for the improvement of loess with recycled construction waste aggregate.

关 键 词：建筑垃圾再生骨料 黄土 路基 动强度 临界动应力 CT扫描 

分 类 号：TQ171.418[化学工程—玻璃工业]