废橡胶绿色透水混凝土力学特性及热性能研究  

Mechanical Characteristics and Thermal Properties of Green Pervious Concrete Made of Waste Rubber

作　　者：郭浩然 GUO Haoran(CCCC Urban Renewal Co.,Ltd.,Beijing 100043,China)

机构地区：[1]中交城市更新有限公司,北京100043

出　　处：《交通科技》2024年第6期147-151,共5页Transportation Science & Technology

摘　　要：为弥补对废旧橡胶绿色透水混凝土研究的不足,文中以透水混凝土为研究对象,进行基本物理力学实验及热性能测试,探究废旧橡胶0%~30%等不同骨料取代率对透水混凝土透水性能、力学特性及热性能的影响。结果表明,透水混凝土强度随废旧橡胶掺入量增加而逐渐降低,当废橡胶掺量为30%时,其抗压、抗折和劈裂拉伸强度分别降低了71%,65%,51%。掺加10%废橡胶的试样抗压强度约为30 MPa,满足工程应用要求。废旧橡胶的加入会降低透水混凝土的渗透系数和孔隙率,其中30%取代率的透水混凝土渗透系数为4.39 mm/s,孔隙率为13.5%。此外,弹性模量随着废旧橡胶含量增加而降低,当废橡胶含量为30%时,弹性模量降低约90%。普通透水混凝土的温度平均比掺加废旧橡胶的绿色透水混凝土高1.3℃,这表明使用废旧橡胶可有效降低透水混凝土的热导率。To make up for the lack of research on green permeable concrete with waste rubber,the permeable concrete was used as the research object to conduct basic physical and mechanical experiments,as well as thermal performance tests.The effects of different aggregate substitution rates,specifically 0%to 30%of waste rubber,on the water permeability,mechanical properties,and thermal properties of permeable concrete were investigated.The results show that the strength of permeable concrete decreases with the incorporation of waste rubber.The compressive,flexural,and splitting tensile strengths are reduced by 71%,65%,and 51%,respectively,when the waste rubber content is 30%.However,the compressive strength of specimens mixed with 10%waste rubber is about 30 MPa,which meets the requirements for engineering applications.The incorporation of waste rubber reduces the permeability coefficient and porosity of permeable concrete,with the permeability coefficient measured at 4.5 MPa for a 30%substitution rate of waste rubber.The permeability coefficient of pervious concrete is 4.39 mm/s,and the porosity is 13.5%.Furthermore,the modulus of elasticity decreases with the increase in waste rubber content,dropping by about 90%when the content of waste rubber is 30%.Additionally,the temperature of ordinary pervious concrete is higher than the air temperature of green pervious concrete with the addition of waste rubber by an average of 1.3℃,indicating that the use of waste rubber can effectively reduce the thermal conductivity of pervious concrete.

关 键 词：废旧橡胶 透水混凝土 力学性能 热性能 

分 类 号：U414[交通运输工程—道路与铁道工程]