Journal of Yangtze River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (12): 188-192,198.DOI: 10.11988/ckyyb.20221508

• Hydraulic Structure and Material • Previous Articles     Next Articles

Mix Proportion Design and Photocatalytic Performance of TiO2 Modified Pervious Concrete

WU Lin-song, WANG Xing-zhi, MEI Meng-jun, LI Zhen, ZENG Lei   

  1. School of Urban Construction, Yangtze University, Jingzhou 434023, China
  • Received:2022-11-09 Revised:2023-01-15 Online:2023-12-01 Published:2023-12-11

Abstract: Photocatalytic pervious concrete pavement offers a novel solution for purifying urban runoff pollution. With methyl orange solution as pollution indicator, the impact of water-binder ratio and aggregate-binder ratio on the porosity, mechanical properties, and water purification performance of photocatalytic pervious concrete modified with TiO2 was investigated. Results demonstrate that larger water-binder ratio leads to increases in compressive strength and flexural strength while decreases in porosity and purification performance. Conversely, larger aggregate-binder ratio results in reduced compressive strength and flexural strength while increased porosity and purification performance. The optimal comprehensive performance of pervious concrete can be achieved at a water-binder ratio of 0.25 and an aggregate-binder ratio 4.0. Additionally, porosity is the primary factor impacting the mechanical properties and water purification performance of pervious concrete. Porosity exhibits a negative correlation with mechanical properties and a positive correlation with water purification performance. This study provides valuable insights for designing the mix proportion of photocatalytic pervious concrete.

Key words: pervious concrete, photocatalytic, mix proportion, mechanical properties, water purification performance

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