Phase composition of CO2-hardened cement in the presence of chloride ionsстатья
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Дата последнего поиска статьи во внешних источниках: 17 июня 2021 г.
Аннотация:Recently, the scientific community pays a great attention to CO2-hardened cement-based binders. This article considers the possibility of CO2 gas industrial waste using as a hardening environ in the process of cement-based building materials production. Some theoretical thermodynamic calculations was obtained to solve this question. It was found that the carbonation of hydrated cement occurs in the presence of a liquid phase. It is shown, that hydrated cement interact with both gaseous CO2 and CO32– ions in solution. The thermodynamic calculations made it possible to predict the most probable reactions at temperatures of 273,15 and 298,15 K. It was established some cement’s hydrates transformations under various conditions. It is shown that the CO2-hardened cement phases are more stable in the chloride solution.