光催化透水混凝土路面为净化城市径流污染提供了新的解决方案。制备TiO2光催化透水混凝土,采用甲基橙溶液作为水污染指示剂,研究了水胶比和骨胶比对透水混凝土孔隙率、力学性能和净水性能的影响。结果表明:透水混凝土水胶比增大,力学性能提高,但孔隙率和净水性能降低;透水混凝土骨胶比增大,力学性能降低,但孔隙率和净水性能提高;水胶比为0.25,骨胶比为4.0时,透水混凝土综合性能最佳。此外,对透水混凝土力学性能和净水性能主要影响因素为孔隙率,孔隙率与力学性能负相关,与净水性能正相关。研究成果为光催化透水混凝土配合比设计提供了重要参考。
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.
关键词
透水混凝土 /
光催化 /
配合比 /
力学性能 /
净水性能
Key words
pervious concrete /
photocatalytic /
mix proportion /
mechanical properties /
water purification performance
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基金
国家自然科学基金项目(51978078);湖北省教育厅指导项目(B2021042);爆破工程湖北省重点实验室开放基金项目(BL2021-17)
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