| Title |
Effect of Damage Control Gas on Chemical Stabilization of Cement Paste Exposed to High Temperature |
| Authors |
김민혁(Kim, Min-Hyouck) ; 허영선(Heo, Young-Sun) ; 이건철(Lee, Gun-Cheol) |
| DOI |
https://doi.org/10.5659/JAIK.2021.37.6.215 |
| Keywords |
Fire Damage; Chemical Recovery; Cement Paste; XRD(X-ray diffraction); Crack |
| Abstract |
In this study, As a study on the recovery characteristics of concrete exposed to high temperature, the effect of DCG on the chemical
recovery of cement paste exposed to high temperature was investigated. As the conditions for examination, the cracked surface was cured
using a DCG to the cement paste test body heated to a high temperature of 800 ℃. Curing conditions was experimented with 20 minutes of
DCG exposure, 40 minutes of retention. Experiments focused on chemical analysis using XRD and crack observation using high magnification
cameras. Experiment result, Calcite appeared to increase in all sections, and Portlandite and C3S were chemically combined with DCG to
produce Calcite and reduced in all sections and the width of the crack could also be confirmed to be reduced in fine detail. In other words,
in the case of DCG cured specimens, the amount of cracks after heating decreased compared to the non-cured specimens. |