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.
Papers published on a yearly basis
Papers
More filters
TL;DR: The early strength development of ordinary Portland cement (OPC)/calcium aluminate cement (CAC) pastes (92.5/7.5, 80/20, and 20/80) was studied in this paper.
76 citations
TL;DR: In this paper, the formation of ettringite and monosulfate from tricalcium aluminate/gypsum mixtures with a molar ratio of 1:1 sulfate-to-aluminate was investigated by isothermal calorimetry and X-ray diffraction analyses.
76 citations
TL;DR: In this paper, it was found from measurements of mechanical properties that the 50% replacement by fly ash was very effective in the improvement of the sulfate resistance of concrete, and no detectable deterioration was observed.
76 citations
TL;DR: In this article, the characteristics of blast furnace slag (BFS) pastes activated with hydrated lime and gypsum were compared in relation to compressive strength, shrinkage, and microstructure (porosity, hydrated products).
Abstract: This article reports the characteristics of blast furnace slag (BFS) pastes activated with hydrated lime (5%) and hydrated lime (2%) plus gypsum (6%) in relation to compressive strength, shrinkage (autogenous and drying) and microstructure (porosity, hydrated products). The paste mixtures were characterized using powder X-ray diffraction (XRD), mercury intrusion porosimetry (MIP) and thermogravimetric analysis (TG/DTG). BSF activated with lime and gypsum (LG) results in larger amounts of ettringite when compared with BFS activated with lime (L). Although the porosities of the L and LG mixtures were about the same, there was a greater pore refinement for the BFS activated with lime, with an increase in mesopores volume with age. The presence of ettringite and the higher volumes of macropores cause the compressive strength of BSF activated with hydrated lime plus gypsum to be smaller than that of BFS activated with lime. For both chemical activators, compressive strength developed slowly at early ages. Autogenous and drying shrinkage were greater for the BFS activated with lime, believed to result from the more refined porous structure in comparison with the mixture activated with gypsum plus lime.
76 citations
TL;DR: In this article, a global expansion mechanism was proposed to accelerate the ettringite formation in the biggest pores without inducing obvious expansion, and then penetrates into capillary and gel pores leading to an accelerated swelling.
76 citations