TY - JOUR

T1 - Chloride ion transport behavior of concrete containing insulating glazed hollow beads exposed to high temperature

AU - Li, Minghou

AU - Zhang, Miao

AU - Selyutina, Nina

AU - Smirnov, Ivan

AU - Li, Beibei

AU - Zhang, Yu

AU - Wang, Wenjing

AU - Jiang, Lu

AU - Liu, Yuanzhen

AU - Ma, Gang

N1 - Publisher Copyright: © 2022 Elsevier Ltd

PY - 2022/10/3

Y1 - 2022/10/3

N2 - Concrete building structures often suffer serious damage after fire, which poses a great threat to the durability of structures. Due to the high thermal stability and pressure relief mechanism of glazed hollow beads (GHBs), GHBs are of positive significance in improving the concrete’s resistance against high temperature. In this paper, the electric flux test was utilized to investigate the chloride ion transport behaviors of concrete containing insulating GHBs (GIC) after high temperature exposure. The electron probe micro-analysis (EPMA) combined with chemical titration method was adopted as a supplement to carry out a more in-depth analysis on concrete’s permeability. The results show that the anti-chloride ion transport performance of GIC was significantly improved compared to normal concrete. Experimental permeation data were further used to prepare a thermal damage permeability model. That is then used to discuss the impact of including glazed hollow beads on concrete’s residual service lifeafter a fire. These data provide technical guidance for the engineering design and safe operation of under sea tunnels and other structures at risk of fire and subsequent saline water intrusion.

AB - Concrete building structures often suffer serious damage after fire, which poses a great threat to the durability of structures. Due to the high thermal stability and pressure relief mechanism of glazed hollow beads (GHBs), GHBs are of positive significance in improving the concrete’s resistance against high temperature. In this paper, the electric flux test was utilized to investigate the chloride ion transport behaviors of concrete containing insulating GHBs (GIC) after high temperature exposure. The electron probe micro-analysis (EPMA) combined with chemical titration method was adopted as a supplement to carry out a more in-depth analysis on concrete’s permeability. The results show that the anti-chloride ion transport performance of GIC was significantly improved compared to normal concrete. Experimental permeation data were further used to prepare a thermal damage permeability model. That is then used to discuss the impact of including glazed hollow beads on concrete’s residual service lifeafter a fire. These data provide technical guidance for the engineering design and safe operation of under sea tunnels and other structures at risk of fire and subsequent saline water intrusion.

KW - Chloride ion diffusion

KW - Concrete transport characteristics

KW - Electron probe micro-analysis

KW - Glazed hollow bead

KW - Heat-resistant concrete

KW - Service life evaluation

KW - Thermal damage

UR - http://www.scopus.com/inward/record.url?scp=85136532139&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/c5c2f9a4-7c9a-3ae6-901a-7e1799b11332/

U2 - 10.1016/j.conbuildmat.2022.128883

DO - 10.1016/j.conbuildmat.2022.128883

M3 - Article

VL - 350

JO - Construction and Building Materials

JF - Construction and Building Materials

SN - 0950-0618

M1 - 128883

ER -