Relation of Damage Variable and Gas Permeability Coefficient of Concrete under Stress

作     者：TANG Guanbao YAO Yan 唐官保;姚燕;WANG Ling;CUI Suping;CAO Yin

作者机构：College of Materials Science and Engineering Beijing University of Technology State Key Laboratory of Green Building Materials China Building Materials Academy 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2018年第33卷第6期

页      面：1481-1485页

核心收录：

学科分类：08[工学] 

基　　金：Funded by the National Natural Science Foundation of China(No.51320105016) 

主　　题：compression tension strain damage variable gas permeability coefficient 

摘      要：Compressive stress and tensile stress were applied to concrete specimens using test rigs designed by RILEM TC 246-TDC. Ultrasonic wave velocity and autoclam permeability system were used to characterize the damage variable and gas permeability coefficient of concrete, respectively. The experimental results show that the strain value of concrete increases with the increasing of stress level and loading time. The damage variable and gas permeability coefficient of concrete under compressive stress decrease at first and increase after a threshold value between 0 and 0.6. When the concrete is under tensile load, the damage variable and gas permeability coefficient increase with tensile stress, with a significant increase from 0.3 to 0.6 tensile stress. There is a strong linear relationship between the damage variable and the gas permeability coefficient, suggesting both as good indicators to characterize the damage of concrete under stress.