水泥稳定再生集料抗压强度试验研究  

Experimental Research on Unconfined Compressive Strength of Cement Stabilized Recycled Aggregate

作　　者：梁行行 李柏彤 侯文杰 姬国强 翟博超 胡力群[3] LIANG Hang-hang;LI Bai-tong;HOU Wen-jie;JI Guo-qiang;ZHAI Bo-chao;HU Li-qun(The Technology Research Center for Sponge City,Fengxi New City Development and Construction Group Co.Ltd.,Xianyang 712000,China;Gold Mantis School of Architecture,Soochow University,Suzhou 215000,China;Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang’an University,Xi'an 710064,China)

机构地区：[1]陕西省西咸新区沣西新城开发建设(集团)有限公司海绵城市技术中心,咸阳市712000 [2]苏州大学金螳螂建筑学院,苏州市215000 [3]长安大学特殊地区公路工程教育部重点实验室,西安市710064

出　　处：《公路》2021年第10期325-330,共6页Highway

基　　金：西咸新区沣西新城海绵城市基础研究资金资助,项目编号2019344。

摘　　要：为探究水泥稳定建筑垃圾再生集料抗压强度变化规律,试验制定了3种级配、5种再生集料砖块与混凝土块体积比例,在等效5%水泥剂量下,测试了混合料的击实特性与7d、28d无侧限抗压强度。研究结果表明:建筑垃圾再生集料密度小、吸水率高,压碎值随砖块含量的增加近似线性增加;随着砖块含量的增加,混合料最大干密度降低,最佳含水率提高,无侧限抗压强度下降;砖块含量一定时,级配上限时抗压强度最高;砖块含量为100%时,混合料抗压强度为3.46~4.92MPa,可满足路面基层施工规范中道路基层强度最低设计指标。In order to investigate the property of unconfined compressive strength(UCS)of cement stabilized recycled aggregate from construction and demolition waste,a study is carried out with the variables including three gradations and five proportions between masonry and concrete(by volume).Then the performance of compaction characteristic and unconfined compressive strength(UCS)is tested with equivalent cement content 5%.The experimental results are concluded as follows:construction waste recycled aggregate is featured with low density and high water absorption rate,and its crush value increases approximately linearly with the increase of brick content;as the brick content increases,the maximum dry density of the mixture decreases,the optimal moisture content increases,and the unconfined compressive strength decreases;when the brick content is constant,the compressive strength is the highest at the upper limit of the gradation;when the brick content is 100%,the compressive strength of the mixture is 3.46~4.92 MPa,which can meet the minimum design index of road base strength that stipulated in the specifications for construction of highway roadbases in China.

关 键 词：道路工程 建筑垃圾 再生集料 水泥稳定类基层 无侧限抗压强度 体积法替换 

分 类 号：U414.01[交通运输工程—道路与铁道工程]