Influence of Lithium Carbonate on C3A Hydration

Autor:	Weiwei Han, Tao Sun, Xinping Li, Zhonghe Shui, Youzhi Chen, Mian Sun
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Advances in Materials Science and Engineering, Vol 2018 (2018)
Druh dokumentu:	article
ISSN:	1687-8434 1687-8442
DOI:	10.1155/2018/6120269
Popis:	Lithium salts, known to ameliorate the effects of alkali-silica reaction, can make significant effects on cement setting. However, the mechanism of effects on cement hydration, especially the hydration of C3A which is critical for initial setting time of cement, is rarely reported. In this study, the development of pH value of pore solution, conductivity, thermodynamics, and mineralogical composition during hydration of C3A with or without Li2CO3 are investigated. The results demonstrate that Li2CO3 promotes C3A hydration through high alkalinity, due to higher activity of lithium ion than that of calcium ion in the solution and carbonation of C3A hydration products resulted from Li2CO3. Li2CO3 favors the C3A hydration in C3A-CaSO4·2H2O-Ca(OH)2-H2O hydration system and affects the mineralogical variation of the ettringite phase(s).
Databáze:	Directory of Open Access Journals
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