改性建筑废渣在路基工程中的应用  

The application of building residue with modification using in subgrade engineering

作　　者：熊山铭 贾彦武[2] XIONG Shanming;JIA Yanwu(Jiangxi Province Gannan Highway Survey and Designing Institute,Ganzhou 341000,China;Hydro China Xibei Engineering Corporation,Xi＇an 710065,China)

机构地区：[1]江西省赣南公路勘察设计院,江西赣州341000 [2]中国水电顾问集团西北勘测设计研究院,西安710065

出　　处：《江西理工大学学报》2018年第5期32-36,共5页Journal of Jiangxi University of Science and Technology

摘　　要：为研究建筑废渣作为路基填料时的物理力学特性,以及如何改良其力学性能,文中通过室内筛分试验、击实试验等对建筑废渣的颗粒组成和含水率与干密度关系进行研究,并基于加州承载比试验对废渣的强度及路用性能进行评价,分析填料中掺加石灰对建筑废渣的力学特性改良效果,确定石灰与建筑废渣的最佳配比.结果表明,建筑废渣中细料含量相对较少,主要为骨架空隙结构;最佳含水率为15%～16%、加州承载比为43%时填料强度最大;填料掺加石灰剂量为12%、渣土细料与粗料比为3∶7时改性建筑废渣填料试件的28 d无侧限抗压强度达到最大,稳定性最好.结合工程实例,使用改性建筑废渣填筑路基后,现场实测弯沉值、回弹模量、压实度指标均能满足路基规范要求.In order to study the physical and mechanical characteristics of the building residue as a roadbed filling, and how to improve its mechanical properties, the particle composition and the relationship between moisture content and dry density of the building residue were studied through indoor screening tests and compaction tests. Based on California Bearing Ratio test, the strength and pavement performance of waste residue are evaluated, the mechanical characteristics improvement effect of lime added on building residue is analyzed, and the optimal ratio of lime and building residue is determined. The results show that the content of fines in the building residue is relatively less, mainly skeleton-pore structure. The maximum filling strength appears when the optimum moisture content is 15 % to 16 % and the California Bearing Ratio is 43 %. The 28-day unconfined compressive strength of the modified building residue specimen reaches the maximum and the stability is the best when the dosage of lime mixed with the filler is 12 % and the ratio of fine material to coarse material is 3：7. Combined with practical work, after filling the roadbed with the modified building residue, the field measured deflection value, resilient modulus, and compaction index can all meet the requirements of the subgrade code.

关 键 词：路基工程 建筑废渣 改性试验 加州承载比 压实度 回弹模量 

分 类 号：U416.1[交通运输工程—道路与铁道工程]