摘要
为整合利用铁尾矿砂和废旧沥青混合料,将这2种废弃材料应用于道路基层进行干缩试验并进行回归分析。结果表明,掺加废旧沥青混合料和掺加铁尾矿砂的再生水泥稳定碎石累计失水率和干缩应变均比水泥稳定碎石的累计失水率和干缩应变小,掺加铁尾矿砂的再生水泥稳定碎石与掺加废旧沥青混合料的再生水泥稳定碎石相比,干缩应变值减小,对含水量变化的敏感性低。对2种再生水泥稳定碎石的干缩应变、失水率和掺量之间进行回归分析得到相同公式模型。
In order to integrate the utilization of iron tailings sand and waste asphalt mixture, this paper applies these two waste materials to the road base for dry shrinkage test and regression analysis. The results show that the cumulative water loss rate and dry shrinkage strain of the recycled cement stabilized macadam mixed with the waste asphalt mixture and the iron tailing sand are smaller than that of the cement stabilized macadam. Compared with the recycled cement stabilized macadam with recycle asphalt pavement, the recycled cement stabilized macadam with iron tailings has smaller dry shrinkage strain and lower sensitivity to the change of water content. The regression analysis of dry shrinkage strain, water loss rate and dosage of two kinds of recycled cement stabilized macadam is carried out, and the same formula model is obtained.
作者
张立群
张学峰
崔宏环
任忠钊
ZHANG Liqun;ZHANG Xuefeng;CUI Honghuan;REN Zhongzhao(School of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,China;Key Laboratory of Civil Engineering Diagnosis,Reconstruction and Disaster Resistance of Hebei Province,Zhangjiakou 075000,China)
出处
《森林工程》
北大核心
2022年第5期128-136,共9页
Forest Engineering
基金
国家自然科学基金(51878242)
张家口市应用基础研究专项(1911032A)。
关键词
铁尾矿砂
RAP
干缩应变
干缩系数
回归分析
Iron tailings sand
RAP
dry shrinkage strain
dry shrinkage coefficient
regression analysis
