废旧混凝土再生细骨料抗剪强度的水敏性研究  

Study on water sensitivity of shear strength of recycled fine aggregate of waste concrete

作　　者：杨帆 董晓强[1] 苗晨曦 常仕奇 任瑜强 YANG Fan;DONG Xiaoqiang;MIAO Chenxi;CHANG Shiqi;REN Yuqiang(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学土木工程学院,山西太原030024

出　　处：《混凝土》2022年第3期57-59,68,共4页Concrete

基　　金：山西省重点研发计划项目(201803D31047);山西省新兴产业领军人才项目(202014)。

摘　　要：将建筑垃圾再生骨料应用于道路工程,不仅实现了建筑垃圾的资源化利用,同时解决了路基材料所需的天然砂石短缺问题。研究进行了废旧混凝土再生骨料基本指标的测定,同时还进行了废旧混凝土再生细骨料的击实试验及直剪试验,得出其最优含水率为4.87%;含水率对抗剪强度指标的影响主要体现在黏聚力上,并且在本试验条件下,试样整体的抗剪强度对水分敏感程度较低,这一结果说明将建筑垃圾再生细骨料应用于路基填筑是较有利的。Applying construction waste recycled aggregates to road projects not only realizes the resource utilization of construction waste,but also solves the problem of shortage of natural sand and gravel required for road constructions.In this study,the basic indices of recycled aggregates of waste concrete were measured,and compaction tests and direct shear tests of recycled fine aggregates were also conducted.The optimal moisture content was 4.87%.Compared with the angle of internal friction,the cohesion is more sensitive to the water content between two shear strength indices,and under the test condition,the overall shear strength of the sample is less sensitive to moisture.This result shows that it is more advantageous to apply the construction waste recycled fine aggregate to the road construction.

关 键 词：废旧混凝土再生细骨料 含水率 抗剪强度 

分 类 号：TU528.01[建筑科学—建筑技术科学]