Topic
Ettringite
About: Ettringite is a research topic. Over the lifetime, 2702 publications have been published within this topic receiving 67056 citations. The topic is also known as: woodfordite.
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TL;DR: In this paper, a series of solid solution phases between ettringite, Ca6Al2(SO4)3(OH)12·26H2O, and thaumasite have been prepared and analysed by X-ray powder diffraction and full pattern fitting.
Abstract: A series of solid solution phases between ettringite, Ca6Al2(SO4)3(OH)12·26H2O, and thaumasite, Ca3SiSO4CO3(OH)6·12H2O, have been prepared and analysed by X-ray powder diffraction and full pattern fitting. Solid solutions were shown to exist with both the ettringite structure (space group P31c) and the thaumasite structure (space group P63, c-axis halved). A possible discontinuity was identified, characterised by a gap in the a-dimension of the solid solution phases produced. This discontinuity is believed to correspond to a switch between the ettringite space group and the thaumasite space group. It is suggested that any discontinuity in the solid solution is caused by differences in the hydrogen bonding of the two structures.
59 citations
TL;DR: In this paper, the influence of coupled substitutions of metakaolin and bentonite clays on hydration of Portland cement is investigated by characterizing hydration kinetics and products related to microstructural and physico-chemical parameters.
59 citations
TL;DR: In this article, the effect of AH3 phase on mechanical property and hydration process was explored and it was shown that AH3 has great influence on the mechanical strength and fills empty spaces thus improving the compacity of the cement paste, meanwhile this increase in compacity seems to reduce the dissolution of anhydrous phases leading to a decrease of the hydration degree.
59 citations
01 Nov 1986
59 citations
TL;DR: In this paper, the authors evaluated the resistance of plain Portland cement and a Portland-limestone cement to sulfate attack at 5°C and found that the mortar bars initially formed ettringite and gypsum causing some expansion, but expanded much more and ultimately disintegrated due to thaumasite formation.
58 citations