氯盐干湿循环下尾矿球混凝土气体渗透性与孔轴线可靠性

doi:10.12068/j.issn.1005-3026.2021.10.016

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (10): 1483-1490.DOI: 10.12068/j.issn.1005-3026.2021.10.016

氯盐干湿循环下尾矿球混凝土气体渗透性与孔轴线可靠性

李艺，李少锋，高炎

(东北大学资源与土木工程学院，辽宁沈阳110819)

修回日期:2020-03-15 接受日期:2020-03-15 发布日期:2021-10-22
通讯作者: 李艺
作者简介:李艺(1972-)，女，辽宁沈阳人，东北大学教授.
基金资助:
“十三五”国家重点研发计划子课题(2016YFC0700801-1)；辽宁省自然科学基金资助项目(20180510019).

Air Permeability and Pore Axis Reliability of Tailing-Ball Concrete Under Chloride Salt Dry-Wet Cycle

LI Yi， LI Shao-feng， GAO Yan

School of Resources ＆ Civil Engineering， Northeastern University， Shenyang 110819， China.

Revised:2020-03-15 Accepted:2020-03-15 Published:2021-10-22
Contact: LI Yi
About author:-
Supported by:
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摘要/Abstract

摘要： 为研究氯盐干湿循环对尾矿球混凝土的影响，分别对普通混凝土(C)、尾矿球混凝土(T)和钢纤维尾矿球混凝土(TF 8)进行气体渗透试验和孔结构试验，得到气体渗透系数、气体体积分数、气泡频率和孔轴线可靠性随氯盐干湿循环侵蚀龄期的变化规律，给出混凝土气体渗透性、孔结构与孔轴线可靠性的关系.结果表明:随氯盐干湿循环侵蚀龄期的增加，C，T和TF 8的气体体积分数、气泡频率均增大，孔轴线可靠性减小，导致气体渗透系数增加;氯盐干湿循环会增加混凝土的渗透性，使孔径分布变差，大孔增加，孔轴线可靠性减小.

关键词: 尾矿球混凝土;氯盐干湿循环;孔结构;气体渗透性;孔轴线可靠性

Abstract: In order to study the effect of chloride corrosion on tailing-ball concrete， the air permeation tests and pore structure tests were carried out on the ordinary concrete(C)， the tailing-ball concrete(T)and the steel fiber tailing-ball concrete(TF 8)respectively. The variation rules of chloride air permeability coefficient， air volume fraction， bubble frequency and pore axis reliability with the increase of the age of chloride salt dry-wet cycle erosion were obtained. The relationship between concrete air permeability， pore structure and pore axis reliability was given. The results show that with the increase of the age of the chloride salt dry-wet cycle erosion， the air volume fraction and the bubble frequency of C， T and TF 8 increase， and the reliability of pore axis reduces， which lead to the increase of air permeability coefficient. Results also show that the chloride dry-wet cycle can increase the permeability of concrete， make the pore size distribution worse， increase the pore size and decrease the reliability of pore axis.

Key words: tailing-ball concrete; chloride dry-wet cycle; pore structure; air permeability; pore axis reliability

中图分类号:

TU528

李艺，李少锋，高炎. 氯盐干湿循环下尾矿球混凝土气体渗透性与孔轴线可靠性[J]. 东北大学学报（自然科学版）, 2021, 42(10): 1483-1490.

LI Yi， LI Shao-feng， GAO Yan. Air Permeability and Pore Axis Reliability of Tailing-Ball Concrete Under Chloride Salt Dry-Wet Cycle[J]. Journal of Northeastern University(Natural Science), 2021, 42(10): 1483-1490.

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氯盐干湿循环下尾矿球混凝土气体渗透性与孔轴线可靠性

Air Permeability and Pore Axis Reliability of Tailing-Ball Concrete Under Chloride Salt Dry-Wet Cycle

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