[1]庞超明,罗时勇,秦鸿根,等.混凝土气体渗透性试验方法[J].东南大学学报(自然科学版),2014,44(6):1235-1239.[doi:10.3969/j.issn.1001-0505.2014.06.025]
 Pang Chaoming,Luo Shiyong,Qin Honggen,et al.Test method for gas permeability of concrete[J].Journal of Southeast University (Natural Science Edition),2014,44(6):1235-1239.[doi:10.3969/j.issn.1001-0505.2014.06.025]
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混凝土气体渗透性试验方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第6期
页码:
1235-1239
栏目:
材料科学与工程
出版日期:
2014-11-20

文章信息/Info

Title:
Test method for gas permeability of concrete
作者:
庞超明罗时勇秦鸿根孙伟
东南大学材料科学与工程学院, 南京211189; 东南大学江苏省土木工程材料重点实验室, 南京211189
Author(s):
Pang Chaoming Luo Shiyong Qin Honggen Sun Wei
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Jiangsu Key laboratory of Construction Materials, Southeast University, Nanjing 211189, China
关键词:
混凝土 气体渗透 影响因素 含水率 真空度
Keywords:
concrete gas permeability influence factors water content vacuum
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2014.06.025
摘要:
研究了含水率、试件厚度、附加压力及真空度等实验参数对混凝土气体渗透系数的影响,分析了气体在混凝土中的扩散机理.研究表明,多孔材料的曲折度可通过不同厚度的渗透性来研究.随着试件厚度的增大,气体渗透系数增大,而渗透系数的增长系数为曲折度因子;由于试件含水率、附加压力和真空度等对实验结果影响很大,实验时应严加控制;当将含水率取为小于5.5%,试件厚度取30 mm,真空度取0.096~0.090 MPa,外加压力取0.3~0.5 MPa,并采用本征渗透系数时,可在缩短试验时间的同时,确保试验结果的准确性和可靠性.
Abstract:
The influences of water content, sample thickness, additional pressure and vacuum on the permeability coefficient of concrete were discussed, and the gas diffusion mechanism was analyzed. Test results show that the tortuous of porous material can be studied through the permeability of samples with different thickness. With the increase of sample thickness, the gas permeability coefficient increases, and the increase factor of the gas permeability coefficient is the tortuosity factor coefficient. The influences of the water content, additional pressure and vacuum on the results are large, so these parameters should be strictly controlled during the experiments. The water content should be less than 5.5%; the sample thickness should be 30 mm; and the appropriate vacuum and the optimal additional pressure should be 0.096 to 0.090 MPa and 0.3 to 0.5 MPa, respectively. The use of these intrinsic coefficient can not only ensure the accuracy and reliability of test results, but also shorten the test time.

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备注/Memo

备注/Memo:
收稿日期: 2014-06-29.
作者简介: 庞超明(1977—),女,博士,高级工程师,pangchao@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51108077)、江苏省自然科学基金资助项目(BK2011612).
引用本文: 庞超明,罗时勇,秦鸿根,等.混凝土气体渗透性试验方法[J].东南大学学报:自然科学版,2014,44(6):1235-1239. [doi:10.3969/j.issn.1001-0505.2014.06.025]
更新日期/Last Update: 2014-11-20