再生砖骨料在底基层用水泥稳定材料中的应用研究  

Application of Recycled Brick Aggregate in Cement Stabilized Materials for Subbase

作　　者：熊磊 金阳 宋宇衡 张滨 李天龙 朱留莉 XIONG Lei;JIN Yang;SONG Yu-heng;ZHANG Bin;LI Tian-long;ZHU Liu-li(Jiangsu Luhe Environmental Technology Co,Ltd,Changzhou 213168,China;Changzhou Municipal Engineering Design and Research Institute Co,Ltd,Changzhou 213004,China)

机构地区：[1]江苏绿和环境科技有限公司,常州213168 [2]常州市政工程设计研究院有限公司,常州213004

出　　处：《建材世界》2022年第2期26-29,共4页The World of Building Materials

基　　金：常州市2020年科技计划项目(国际科技合作CZ20200005).

摘　　要：研究了再生砖骨料使用量、不同级配砖骨料掺和比例、水泥用量等因素对水稳材料最佳含水率、最大干密度以及7 d无侧限抗压强度性能的影响。结果表明:水稳材料的最佳含水率随着砖骨料用量增加而增大,最大干密度随着砖骨料用量增加逐渐降低,且随着砖骨料用量增加,水稳试件的7 d无侧限抗压强度减小,强度变异系数增大;砖骨料246∶砖骨料0~14=40%∶60%时,所制备的水稳试件7 d无侧限抗压强度最高;随着水泥用量增加,所制备的再生砖骨料水稳7 d无侧限抗压强度逐渐增大,根据水泥用量与试件的7 d无侧限抗压强度关系拟合公式R_(d)=0.48·C+0.54(C为水泥用量,%),可为实际工程中不同等级的道路用水泥稳定材料选取适宜的水泥用量提供依据。The influence of recycled brick aggregate content,mixing proportion of brick aggregate with different gradation,dosage of cement on the optimum water content,the maximum dry density and the 7 d unconfinde compressive strength of the cement stabilized materials was studied.The results showed that the optimum water content of recycled cement stabilized materials increases with the increase of the amount of brick aggregate.The maximum dry density decreases gradually with the increase of the amount of brick aggregate,and with the increase of the amount of recycled brick aggregate,the 7 d unconfined compressive strength of recycled cement stabilized materials decreases and the strength variation coefficient increases.Brick aggregate 246∶Brick aggregate 0~14=40%∶60%,the prepared cement stabilized materials has the highest 7 d unconfined compressive strength.With the increase of cement content,the cement stabilized materials 7 d unconfined compressive strength gradually increases.According to the relationship between cement dosage and 7 d unconfined compressive strength,the fitting formula R_(d)=0.48·C+0.54(C is cement dosage,%),which provides a basis for selecting appropriate cement dosage for different grades of road cement stabilized materials in practical engineering.

关 键 词：再生砖骨料 水泥稳定材料 无侧限抗压强度 最佳含水率 

分 类 号：TU5[建筑科学—建筑技术科学]