Title: Durability Investigations into CFRP-confined Concrete in H2SO4

Author(s): Yongcheng Ji and Yail J. Kim

Publication: Symposium Paper

Volume: 331

Issue:

Appears on pages(s): 136-150

Keywords: carbon fiber reinforced polymer (CFRP); composite; durability; sulfuric acid

DOI: 10.14359/51715598

Date: 2/1/2019

Abstract:
This paper presents the durability of concrete confined with carbon fiber-reinforced polymer (CFRP) composite sheets in sulfuric acid. An accelerated conditioning scheme is employed to comparatively assess the performance of CFRP-confined concrete relative to that of plain concrete, based on various test methods such as optical microscopy, chemical reaction with BaCl2, thermogravimetric analysis, and rapid chloride penetration. Test results reveal that the cement paste of the plain concrete gradually deteriorates through acid exposure, substantiated by the detection of CaSO4 and BaSO4, whereas the CFRP system lessens the detrimental chemical interaction between the core concrete and sulfuric acid. The confining system is effective in preserving the integrity of the concrete and lowering the extent of chloride penetration and conductivity.