Morpho-topological investigation of the mechanisms and kinetic regimes of alite dissolution

Autor:	P. Juilland, E. Gallucci
Rok vydání:	2015
Předmět:	Limiting factor Cement Alite Calcium hydroxide Inorganic chemistry Kinetics Thermodynamics Building and Construction Kinetic energy Volumetric flow rate chemistry.chemical_compound chemistry General Materials Science Dissolution
Zdroj:	Cement and Concrete Research. 76:180-191
ISSN:	0008-8846
DOI:	10.1016/j.cemconres.2015.06.001
Popis:	The pure dissolution of alite MIII polymorph under various flow conditions and initial calcium hydroxide concentrations was investigated in a designed flow through dissolution cell. Dissolution profiles and their associated dissolution rates were measured using vertical scanning interferometry (VSI). Two main characteristic features were observed: the rate of dissolution decreases non-linearly with the amount of calcium hydroxide in the initial solution composition and a transition of rate limiting factor occurs for a threshold undersaturation of alite. This behaviour is deduced from the dependency of the rate of dissolution with the flow rate which decreases drastically at low undersaturation level and further supported by the determination of apparent activation energies of dissolution. The study is complemented with surface imaging of dissolution front from samples submitted to different experimental conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ba7f5714dbe7f08aebcbfea48ab91198 https://doi.org/10.1016/j.cemconres.2015.06.001 Zobrazit plný text záznamu Full Text from ScienceDirect