Research on the performance of sand-based environmental-friendly water permeable bricks

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Cai, Runze^1 ; Mandula^1 ; Chai, Jinyi^1

Inner Mongolia University, Transportation College, Hohhot

010070, China^1

关键词: Aggregate grading;    Coarse aggregates;    Environmental-friendly;    Permeable concretes;    Service properties;    Water permeability;    Water permeable bricks;    Water-cement ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012136/pdf
DOI  :  10.1088/1755-1315/113/1/012136

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper examines the effects of the amount of admixture, the water cement ratio, the aggregate grading, and the cement aggregate ratio on the mechanical service properties and of porous concrete pavement bricks including strength, water permeability, frost resistance, and wear resistance. The admixture can enhance the performance of water permeable brick, and optimize the design mix. Experiments are conducted to determine the optimal mixing ratios which are given as; (1) the admixture (self-developed) within the content of 5% of the cement quality; (2) water-cement ratio equal to 0.34; (3) cement-aggregate ratio equal to 0.25; (4) fine aggregate of 70% (particle size 0.6-2.36mm); and coarse aggregate of 30% (particle size: 2.36-4.75mm). The experimental results that the sand-based permeable concrete pavement brick has a strength of 35.6MPa and that the water permeability coefficient is equal to 3.5×10-2cm/s. In addition, it was found that the concrete water permeable brick has good frost resistance and surface wear resistance, and that the its production costs are much lower than the similar sand-based water permeable bricks in China.