摘要
研究了轻质砖再生细集料掺量对水泥稳定砖混再生集料混合料无侧限抗压强度、劈裂强度、抗压回弹模量、抗冲刷性能与收缩性能的影响。结果表明:随轻质砖再生细集料掺量增加,混合料的最佳含水率大幅增大,最大干密度大幅降低,无侧限抗压强度、劈裂强度、抗压回弹模量与抗冲刷性能均下降;混合料的干缩应变和温缩应变随轻质砖与水泥掺量的增加而增大,轻质砖再生细集料掺量对混合料干缩影响较大,而水泥掺量对混合料温缩影响较大,粗型级配混合料的上述性能均优于其它2种级配混合料。全砖混再生集料水泥稳定混合料可用于各等级公路路面基层,当需要掺入轻质砖再生细集料时,其掺量应控制在20%以内。
In order to study the influence of the content of lightweight bricks on the properties of cement stabilized construc-tion and demolition waste recycled aggregates,the unconfined compressive strength,splitting strength,compressive resilience modulus,erosion resistance and shrinkage performance of different components of mixture were tested.The results show that:with the increasing of the lightweight brick content,the optimal moisture content of the mixture increased significantly,and the maximum dry density significantly reduced,the unconfined compressive strength,splitting strength,compressive resilience modulus and erosion resistance of the mixture decreased,and the dry shrinkage strain and temperature shrinkage strain of the mixture increase as the amount of lightweight bricks and cement increased,the amount of lightweight bricks had a greater impact on the drying shrinkage of the mixture,while the amount of cement had a greater impact on the temperature shrinkage of the mixture.The performance of coarsegraded mixture was better than the other two graded mixtures on the above properties.The cement stabilized material of full brickconcrete recycled aggregate can be used for pavement base of various grades of roads and highways.When it is necessary to mix lightweight bricks,the amount of lightweight bricks should be strictly limited 20%or less.
作者
郭立成
万暑
李浩
吴超凡
徐艺珅
GUO Licheng;WAN Shu;LI Hao;WU Chaofan;XU Yishen(Foshan Road and Bridge Construction Co.Ltd.,Foshan 528300,China;Hunan Province Research and Construction Center for Building Solid Waste Utilization Technology,Changsha 410007,China;Hunan Yunzhong Recycling Technology Co.Ltd.,Changsha 410007,China;Foshan Traffic Technology Co.Ltd.,Foshan 528300,China)
出处
《新型建筑材料》
2021年第3期51-56,80,共7页
New Building Materials
基金
湖南省交通运输厅科技进步与创新项目(201806)
湖南省科技计划项目(2018TP2038)。
关键词
道路工程
轻质砖
水泥稳定再生集料
基层
路用性能
road engineering
lightweight brick
cement stabilized recycled aggregate
base
road performance
