| Title |
Thermodynamic Modeling of Long-Term Phase Development of Slag Cement in Seawater |
| Authors |
박솔뫼(Park, Solmoi) ; 서용철(Suh, Yongcheol) ; 남광희(Nam, Kwang Hee) ; 원윤상() |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.4.0341 |
| Keywords |
포틀랜드 시멘트; 고로슬래그; 해수; 열역학 모델링 Portland cement; Blast furnace slag; Seawater; Thermodynamic modeling |
| Abstract |
Known to improve resistance to chloride ingress, blast furnace slag is a widely used supplementary cementitious material. However,
a detailed characterization of cements blended with slag exposed to seawater remains unavailable. This study employs thermodynamic
modeling as a toolkit for assessing the long-term phase evolution of slag cement in seawater. The modeling result shows that slag incorporation leads to the formation of phases that are less prone to structural alteration in seawater. Formation of more ettringite is
expected to induce expansion in both plain and blended cements, while brucite is unstable in the blended systems. Despite this, the porosity is expected to increase in the blended cements, and aluminate hydrates with a higher chloride binding capacity are more abundant in the blended cements. The results suggest that the use of slag in concrete improves the durability performance of concrete in marine environments. |