摘要：The purpose of this study was to improve the application effect of pervious concrete in practical engineering. Firstly, recycled brick aggregate was prepared by crushing of waste clay bricks, and then a new type of pervious concrete was prepared after secondary grouting treatment. The effects of the content of polypropylene steel fibre, target porosity, water cement ratio and particle size of recycled brick aggregate on the new type of pervious concrete were studied. The results showed that the target porosity had the most significant effect on the mechanical strength of the regenerated brick specimens, and the smaller the target porosity was, the higher the compressive strength was, and vice versa. The particle size of recycled brick aggregate had little influence on the mechanical strength value of the specimen. Appropriate amount of polypropylene steel fibre can significantly improve the mechanical strength of the pervious concrete, and the flexural strength was higher than the compressive strength. Therefore, when the target porosity was 24%, the water cement ratio was 0.32, the content of polypropylene steel fibre was 3 kg/m3, and the particle size of recycled brick aggregate was 9.5 mm-13.2 mm, the concrete can achieve a good balance between mechanical properties and water permeability.
关键词：Pervious concrete;Flexural strength;Compressive strength;Target porosity;Water cement ratio
