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Calcium aluminates
About: Calcium aluminates is a research topic. Over the lifetime, 490 publications have been published within this topic receiving 9200 citations.
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TL;DR: In this paper, the interfacial reaction between hydroxyapatite and alumina has been studied, and it was found that alumina completely reacted with hydroxymatic acid and formed alumina-rich calcium aluminates at relatively low temperatures.
91 citations
TL;DR: In this paper, the treatment of Ca3SiO5, β-Ca2SiO4, Ca3Al2O6 and Ca12Al14O33 low water/solids ratio compacted pastes with carbon dioxide immediately after preparation resulted in a rapid strength development of the calcium silicates and a negligible strength development in the calcium aluminates.
89 citations
24 Sep 1983-Philosophical transactions - Royal Society. Mathematical, physical and engineering sciences
TL;DR: In this paper, the microstructural development of the hydrates the structure of colloidal C--S--H gel, which is the main hydration product, the kinetics of hydration and the aqueous solution chemistry of cement pastes and pastes made with pure C$S.
Abstract: Portland cement is based on calcium silicates with lesser amounts of calcium aluminates. Its reaction with water, which is responsible for strength development, is a complex process involving the precipitation of hydration products in colloidal gel and crystalline forms. This paper describes the microstructural development of the hydrates the structure of colloidal C--S--H gel, which is the main hydration product, the kinetics of hydration and the aqueous solution chemistry of cement pastes and pastes made with pure C$_{3}$S. Theories relating to the mechanism of cement hydration are examined and these are discussed in terms of studies of the effect of accelerating and retarding admixtures for cement.
87 citations
TL;DR: In this article, the formation of tricalcium aluminate, Ca 2 Al 2 O 6 or C 3 A was studied in the range 1150-1350°C using quantitative X-ray diffraction (XRD) analysis of pellets made from powder mixtures of calcite and α-alumina (α-Al 2 O 3 )(the alumina was replaced by gibbsite in some experiments).
86 citations
Patent•
19 Jul 2005TL;DR: In this article, a method for the production and the use of hydraulic binders for hydraulic binding is described, which is based on a belite-sulfo-aluminous clinker.
Abstract: The invention relates to a belite-sulfoaluminous clinker, to a method for the Production and the use thereof for preparing hydraulic binders comprising the following mineralogical composition: 5 to 35 %, preferably 10 to 20 % a calcium aluminoferrite phase whose composition corresponds to a general formula C2AXF(1-X), wherein X ranges from 0.2 to 0.8, 15 to 35 %, preferably 20 to 30 % a calcium sulphoaluminate phase “yee' limite” (C4A3d), 40 to 75 %, preferably 45 to 65 % belite (C2S), 0.1 to 10 % one or several mineral phases selected form calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime, periclase and/or a vitreous phase and at least a secondary element selected from sulfur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, wherein the total content of said secondary elements is equal to or less than 15 %.
84 citations