摘要
为研究铁尾矿砂-水泥改良膨胀土的工程特性,并确定最优铁尾矿砂掺量,将铁尾矿砂、水泥按照不同的比例掺入膨胀土中进行室内试验。试验结果表明,相同击实功下,随着水泥掺量的增加,膨胀土的最大干密度逐渐增加,最优含水率逐渐减小。铁尾矿砂的掺入对膨胀土击实特性的影响显著,随铁尾矿砂掺量的增加,最大干密度逐渐增大,最优含水率逐渐减小。在水泥掺量相同时,随着铁尾矿砂掺量的增加,无侧限抗压强度先增加后减小,且最优铁尾矿砂掺量均为20%。
In order to study the engineering properties of ferrous mill tailings-cement improved expansive soil and determine the optimal amount of ferrous mill tailings,the ferrous mill tailings and cement were mixed into expansive soil in different proportions for laboratory tests.The test results show that under the same compaction power,with the increase of cement content,the maximum dry density of expansive soil increases gradually,and the optimal moisture content decreases gradually.The addition of ferrous mill tailings has a significant effect on the compaction characteristics of expansive soil.With the increase of ferrous mill tailings content,the maximum dry density gradually increases,and the optimal water content gradually decreases.In the case of the same cement content,as the content of ferrous mill tailings increases,the unconfined compressive strength first increases and then decreases,and the optimal content of ferrous mill tailings is 20%.
作者
程伟
高峰
胡建林
郑瑞海
王晓燕
宋超
CHENG Wei;GAO Feng;HU Jianlin;ZHENG Ruihai;WANG Xiaoyan;SONG Chao(School of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075000, China;School of Architecture and Surveying and Mapping Engineering, Shanxi Datong University, Datong 037003, China;Technology Innovation Center for Comprehensive Utilization of Solid Waste from Asphalt Pavement Engineering, Zhangjiakou 075000, China)
出处
《交通科技》
2022年第3期17-21,共5页
Transportation Science & Technology
基金
河北省省属高等学校基本科研业务费研究项目(2021QN-JS02)
河北省创新能力提升计划项目(21567614H)资助。
关键词
膨胀土
铁尾矿砂
无侧限抗压强度
最优掺量
expansive soil
ferrous mill tailings
unconfined compressive strength
optimum dosage
