哈尔滨工业大学（深圳）学术讲座

演讲人Speaker：陈怀亮      

题目Title: Mesoscale modelling and experimental studies of rubberized concrete

时间Date：2024年6月 25日       Time：下午16：00

地点Venue： H301

内容摘要Abstract： 

   The use of rubber granules recycled from waste tires as fine aggregates in concrete products can not only reduce the consumption of river sand, but also enable the large-scale use of waste tires. The addition of rubber particles further enlarges the complexity and heterogeneity of concrete, which makes the mechanical properties of rubberized concrete more unstable than ordinary concrete. This study presents an experimental study and a mesoscale model for evaluating the mechanical properties of crumb rubber concrete (CRC). In the experimental study, compressive, indirect tensile, and flexural strengths of CRC with 6%, 12% 18% rubber contents were tested. Then the tested CRC samples were modelled as a five-phase material containing rubber, coarse aggregate, mortar, aggregate-mortar interface layer, and rubber-mortar interface layer. Numerical results also indicated that the mechanical strength reduction of CRC was mainly controlled by the rubber content, rather than the shape, size, distribution of rubber. The effect of rubber particles on the mechanical properties of concrete was similar to that of pores. Due to the low stiffness of rubber, the location of the rubber particles was prone to cracking under stress concentration conditions, which could be the main reason for the reduction in the tensile strength of CRC.

个人简介(About the speaker):

Dr. Huailiang Chen was a visiting scholar at the University of South Australia from March 2018 to March 2019. From July 2019 to June 2023, he studied for a PhD in structural engineering at the University of South Australia, conducting research on mesoscale simulation and experimental studies of rubber concrete.