Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cementation by the carbonation of hydrated lime
AbstractIn this study, the factors which control carbonate cementation have been examined and several hypothesis developed to explain their interaction. These factors include the pressure, concentration, temperature and velocity of the carbonating gas as well as the thickness, temperature, gas permeability, moisture and Ca(OH)2 contents of the compact. Of these factors, the greatest limitation for the more popular application of the cement is related to the diffusion of the carbonating gas into thicker or less permeable products. A possible reaction mechanism for the cementing process has been outlined and the matrix examined by electron optics, X-ray diffraction, thermal analysis and mercury intrusion porosimetry. These methods have shown that, in general, the matrix is composed of mostly amorphous or very poor crystalline forms of calcium carbonate. The only phases detected by X-ray diffraction methods were a small percentage of unreacted portlandite Ca(OH)2, and calcite. Less than half of the calcium carbonate formed was present as crystalline calcite.
Cementation by the carbonation of hydrated lime
AbstractIn this study, the factors which control carbonate cementation have been examined and several hypothesis developed to explain their interaction. These factors include the pressure, concentration, temperature and velocity of the carbonating gas as well as the thickness, temperature, gas permeability, moisture and Ca(OH)2 contents of the compact. Of these factors, the greatest limitation for the more popular application of the cement is related to the diffusion of the carbonating gas into thicker or less permeable products. A possible reaction mechanism for the cementing process has been outlined and the matrix examined by electron optics, X-ray diffraction, thermal analysis and mercury intrusion porosimetry. These methods have shown that, in general, the matrix is composed of mostly amorphous or very poor crystalline forms of calcium carbonate. The only phases detected by X-ray diffraction methods were a small percentage of unreacted portlandite Ca(OH)2, and calcite. Less than half of the calcium carbonate formed was present as crystalline calcite.
Cementation by the carbonation of hydrated lime
Moorehead, D.R. (Autor:in)
Cement and Concrete Research ; 16 ; 700-708
25.06.1986
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Phase and morphology evolution of calcium carbonate precipitated by carbonation of hydrated lime
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