摘要
为了提高铁尾矿砂的综合利用率、改善水泥土的力学性能.在水泥土中加入一定量铁尾矿砂,通过无侧限抗压强度试验,探究水泥掺量、铁尾矿砂掺量对水泥复合土强度的影响,并采用比强度的方法分析二者对水泥复合土的强度贡献.试验结果表明:水泥掺量对水泥复合土的强度影响显著,在水泥掺量8%~20%范围内,随着水泥掺量的增加,水泥复合土的抗压强度呈线性增加,但水泥水化效应对水泥复合土的强度贡献逐渐减小;水泥复合土的抗压强度随铁尾矿砂的增加呈先增大后减小的趋势,在掺量20%时强度达到峰值;铁尾矿砂填充效应对水泥复合土的强度贡献主要体现在高水泥掺量下.
In order to improve the comprehensive utilization rate of iron tailings and improve the mechanical properties of cement soil.A certain amount of iron tailings is added to cement soil.Through the unconfined compressive strength test,the influence of cement content and iron tailings content on the strength characteristics of cement composite soil is explored,and the specific strength method is used to analyze the strength contribution of the two to cement composite soil.The test results show that the cement content has a significant influence on the strength of cement composite soil.In the range of 8%~20%cement content,the compressive strength of cement composite soil increases linearly with the increase of cement content,but the contribution of cement hydration effect to the strength of cement composite soil decreases gradually.The compressive strength of cement composite soil increases first and then decreases with the increase of iron tailings,and reaches the peak when the content is 20%.The contribution of iron tailings filling effect to the strength of cement composite soil is mainly reflected in the high cement content.
作者
胡建林
高鹏飞
崔宏环
崔志远
吕星辰
HU Jianlin;GAO Pengfei;CUI Honghuan;CUI Zhiyuan;L Xingchen(School of Civil Engineering,Hebei University of Architecture,Hebei Zhangjiakou 075000,China;Key Laboratory of Civil Engineering Diagnosis,Reconstruction and Disaster Resistance of Hebei Province,Hebei Zhangjiakou 075000,China)
出处
《西安建筑科技大学学报（自然科学版）》
北大核心
2022年第3期338-344,共7页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金(51878242)
河北省高校基本科研业务费项目(2021QNJS02)
张家口市科技计划财政基金资助项目(1911035A)。
关键词
水泥土
力学特性
铁尾矿砂
增强效应
cement-soil
mechanical properties
iron tailings sand
enhancement effect
