Mix Proportion Design and Photocatalytic Performance of TiO2 Modified Pervious Concrete

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

doi:10.11988/ckyyb.20221508

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

Hydraulic Structure and Material

Mix Proportion Design and Photocatalytic Performance of TiO₂ Modified Pervious Concrete

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

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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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WU Lin-song, WANG Xing-zhi, MEI Meng-jun, LI Zhen, ZENG Lei. Mix Proportion Design and Photocatalytic Performance of TiO₂ Modified Pervious Concrete[J]. Journal of Changjiang River Scientific Research Institute. 2023, 40(12): 188-192,198 https://doi.org/10.11988/ckyyb.20221508

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