新型自密实透水混凝土抗堵塞性能及堵塞模型

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (11): 3906-3913.

所属专题：水泥混凝土

新型自密实透水混凝土抗堵塞性能及堵塞模型

是华荣¹, 薛璐¹, 朱平华², 史志浩², 王新杰², 刘铭²

1.中节能(常州)环保科技园发展有限公司,常州 213100;
2.常州大学城市建设学院,常州 213164

收稿日期:2023-06-09 修订日期:2023-07-22 出版日期:2023-11-15 发布日期:2023-11-22
通信作者: 朱平华,博士,教授。E-mail:zph@cczu.edu.cn
作者简介:是华荣(1982—),男。主要从事功能型建筑材料方面的研究。E-mail:1269889348@qq.com
基金资助:
国家自然科学基金(51878081)

Anti-Clogging Performance and Clogging Model of New Self-Compacting Pervious Concrete

SHI Huarong¹, XUE Lu¹, ZHU Pinghua², SHI Zhihao², WANG Xinjie², LIU Ming²

1. China Energy Conservation (Changzhou) Environmental Protection Science Park Development Co., Ltd., Changzhou 213100, China;
2. School of Urban Construction, Changzhou University, Changzhou 213164, China

Received:2023-06-09 Revised:2023-07-22 Online:2023-11-15 Published:2023-11-22

摘要/Abstract

摘要： 为研究直通孔孔径、积水深度和水平径流速度对新型自密实透水混凝土(NSPC)抗堵塞性能的影响规律,测试了堵塞和高压水枪冲洗后NSPC的透水系数,并基于堵塞物被直通孔道捕获的概率建立了NSPC堵塞模型。结果表明,NSPC堵塞循环后的透水系数随直通孔孔径增加而增大,当直通孔孔径与堵塞物粒径之比大于5时,堵塞物形成的颗粒流仍会造成NSPC堵塞。积水深度的升高会降低NSPC堵塞后的透水系数,水平径流速度对NSPC的透水系数影响较小,但会延迟透水系数降低的时间。高压水枪清洗后NSPC的透水系数恢复率最高可达到85%。建立的NSPC堵塞模型能够预测直通孔道内堵塞物质量和透水系数衰减率的变化规律。

关键词: 透水混凝土, 抗堵塞性能, 透水系数, 直通孔道, 堵塞模型

Abstract: In order to study the influence of straight through pore diameter, water depth and horizontal runoff velocity on the anti-clogging performance of new self-compacting pervious concrete (NSPC), the permeability coefficient of NSPC after blockage and high-pressure water gun flushing was tested. Based on the probability that the blockage is captured by straight through pore, a NSPC clogging model was established. The results show that the permeability coefficient of NSPC increases with the increase of diameter of straight through pore. When the ratio of straight through pore diameter to blockage particle size is greater than 5, the particle flow formed by blockage still causes NSPC blockage. The increase of water depth reduces the permeability coefficient of NSPC after blocking. The horizontal runoff velocity has little effect on permeability coefficient of NSPC, but it delays the time of permeability coefficient reduction. The highest recovery rate of permeability coefficient of NSPC after high pressure water gun flushing reaches 85%. The established NSPC clogging model can predict the variation of the mass of blockage and the attenuation rate of permeability coefficient in straight through pore channel.

Key words: pervious concrete, anti-clogging performance, permeability coefficient, straight through pore channel, clogging model

中图分类号:

TU528

是华荣, 薛璐, 朱平华, 史志浩, 王新杰, 刘铭. 新型自密实透水混凝土抗堵塞性能及堵塞模型[J]. 硅酸盐通报, 2023, 42(11): 3906-3913.

SHI Huarong, XUE Lu, ZHU Pinghua, SHI Zhihao, WANG Xinjie, LIU Ming. Anti-Clogging Performance and Clogging Model of New Self-Compacting Pervious Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 3906-3913.

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新型自密实透水混凝土抗堵塞性能及堵塞模型

Anti-Clogging Performance and Clogging Model of New Self-Compacting Pervious Concrete

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