Mechanical Characteristics and Thermal Properties of Green Pervious Concrete Made of Waste Rubber
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 experi-ments,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 ther-mal properties of permeable concrete were investigated.The results show that the strength of permea-ble concrete decreases with the incorporation of waste rubber.The compressive,flexural,and split-ting tensile strengths are reduced by 71％,65％,and 51％,respectively,when the waste rubber con-tent 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 rub-ber reduces the permeability coefficient and porosity of permeable concrete,with the permeability co-efficient measured at 4.5 MPa for a 30％substitution rate of waste rubber.The permeability coeffi-cient of pervious concrete is 4.39 mm/s,and the porosity is 13.5％.Furthermore,the modulus of e-lasticity 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.
万方数据
维普
