改性橡胶粉水泥稳定碎石抗裂性能研究  

Crack Resistance Performance of Cement-Stabilized Macadam Mixed with Modified Rubber Powder

作　　者：韩洪宇 李少秋 魏武巍 季节 王君武 李增宝 郑文华 HAN Hongyu;LI Shaoqiu;WEI Wuwei;JI Jie;WANG Junwu;LI Zengbao;ZHENG Wenhua(The Seventh Engineering Co.,Ltd.of CFHEC,Zhengzhou 451450,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Engineering Technology Innovation Center for Construction Waste Recycling,Ministry of Housing and Urban-Rural Development,Beijing 100044,China;Beijing Fangshan New City Investment Co.,Ltd.,Beijing 102442,China)

机构地区：[1]中交一公局第七工程有限公司,郑州451450 [2]北京建筑大学土木与交通工程学院,北京100044 [3]住房城乡建设部建筑垃圾资源化工程技术创新中心,北京100044 [4]北京市房山新城投资有限责任公司,北京102442

出　　处：《硅酸盐通报》2024年第11期4254-4260,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(52078025);北京市属高等学校高水平科研创新团队建设支持计划项目(BPHR20220109);北京建筑大学青年教师科研能力提升计划(X24013);北京建筑大学研究生创新项目(PG2024042)。

摘　　要：为研究橡胶粉、建筑垃圾再生集料和级配对水泥稳定碎石抗裂性能的影响,本文进行了半圆弯曲试验,通过刚度、断裂能、断裂韧性等指标评价改性橡胶粉水泥稳定碎石抗裂性能。结果表明,未改性橡胶粉可增强混合料的断裂能、断裂韧性,改性橡胶粉对混合料抗裂性能的提升更显著。抗裂级配可提高混合料的刚度、断裂能和断裂韧性,从而增强混合料的抗裂性能。改性橡胶粉水泥稳定碎石的抗裂性能随着再生集料掺量的增加而降低,当再生集料以等体积的方式替代30%的天然集料时,其抗裂性能和强度均优于普通水泥稳定碎石。To study the effects of rubber powder,recycled construction waste aggregate and gradation on the crack resistance performance of cement-stabilized macadam,a semi-circular bending test was conducted to evaluate the crack resistance performance of cement-stabilized macadam mixed with modified rubber powder,using indicators such as stiffness,fracture energy,and fracture toughness.The results demonstrate that unmodified rubber powder enhances the fracture energy and fracture toughness of mixture,with modified rubber powder exhibiting a more significant improvement in crack resistance performance.The crack resistance gradation can improve the stiffness,fracture energy,and fracture toughness of mixture,thereby enhancing its crack resistance performance.The crack resistance performance of cement-stabilized macadam mixed with modified rubber powder decreases with the increase of recycled aggregate.When 30%of the natural aggregate is replaced with recycled aggregate on an equal volume basis,the crack resistance performance and strength of cement-stabilized macadam mixed with modified rubber powder are superior to those of ordinary cement-stabilized macadam.

关 键 词：改性橡胶粉 建筑垃圾 水泥稳定碎石混合料 抗裂级配 抗裂性能 道路工程 

分 类 号：U414[交通运输工程—道路与铁道工程]