AUTHOR=Xiao Qidan , Xia Yapei , Zhang Guanguan , Lin Xiaoli , Zhao Jun 

TITLE=Numerical simulation study on pore clogging of pervious concrete pavement based on different aggregate gradation

JOURNAL=Frontiers in Physics

VOLUME=Volume 11 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2023.1162899

DOI=10.3389/fphy.2023.1162899

ISSN=2296-424X

ABSTRACT=Pervious concrete pavement can effectively reduce surface runoff, but it will be clogged with time and affect the service life of the pervious pavement. In this paper, based on three groups of pervious concrete specimens with different aggregate gradations optimized by previous experiments, the pavement clogging simulation test is carried out by using the two-way coupling of particle flow code with computational fluid dynamics (PFC-CFD). The results show that when the gradation of aggregate in the pervious pavement is different, the volume fraction of clogging material in the pavement and the time when the volume fraction of the clogging material reaches the maximum are also different. It is related to the zigzag degree and size of the pore in the pervious pavement. The smaller the particle size of coarse aggregate in the pervious pavement, the easier it is to be clogged, and the discontinuous graded coarse aggregate has a good shielding effect on the clogging material. Different clogging material gradations have different effects on the clogging of pervious pavement. According to the above research results, researchers can select different mix ratios of anti-clogging pervious concrete according to different use areas. The law obtained from the experiment can provide a reference for further study of the double-layer pervious pavement structure design.