Sensitivity of the Test to Assess Near Surface Permeability of Concrete

被引：0
|
作者：
Ye J. [1 ]
Yang C. [1 ]
Yang K. [1 ]
机构：
[1] College of Materials Science and Engineering, Chongqing University, Chongqing
来源：
Yang, Kai (yang.kai@cqu.edu.cn) | 1600年 / Tongji University卷 / 20期
关键词：
Air permeability index; High-performance concrete; In situ permeation test; Sensitivity;
D O I：
10.3969/j.issn.1007-9629.2017.04.028
中图分类号：
学科分类号：
摘要：
The working theory of the Autoclam air permeability test was proposed and key factors to affect the sensitivity were discussed. Results indicate that the sensitivity of Autoclam can be improved using a test ring with a larger internal diameter or a test chamber with a lower volume, while test duration and pressure intensity had no noticeable effect on the air permeability. Test sensitivity can be further improved by reducing the volume of air compressed to the levels which were typically used for assessing normal performance of concrete. It is found that the modified Autoclam is an in situ technique capable of measuring air permeability of HPC. © 2017, Editorial Department of Journal of Building Materials. All right reserved.
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页码：656 / 660
页数：4
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