THEORETICAL MODEL FOR ESTIMATION OF MOISTURE CONTENT OF CFRP-CONCRETE INTERFACE BASED ON ELECTRICAL MEASUREMENTS
Bond deterioration is a serious durability problem for concrete structures strengthened with carbon fiber reinforced polymer(CFRP)in hygrothermal environment.Currently,it is well understood that the moisture in the CFRP-concrete interface is responsible for the deterioration and the elevated temperature can acclerate the process.To quantitatively study the CFRP-concrete bond behavior degradation,the moisture content in the CFRP-concrete interface is necessary to be known.However,up to now,there is still lacking of effective method to measure the moisture content.In this study,an easy,rapid and accurate method is proposed to estimate the moisture content in CFRP-concrete interface based on electrical measurements.Theoretical model is developed to estimate the moisutre content change in the CFRP-concrete interface based on the electrical response,in which the electrical resistiviy of CFRP-concrete interface is calculated based on series and parallel models.Meanwhile,the temperature effect is also considered in the model.To improve the understanding of temperature and moisture effects to electrical properties of CFRP-concrete interface,parametric analysis is conducted by applying the model.
CFRP concrete moisture content electrical measurements interface
Yi Wang Jun Deng Chunjian Gong Yan Xie
School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China
国际会议
新加坡
英文
1-4
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）