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: The changes occurring in the crystallised phases during degradation of an ordinary Portland cement have been studied in this paper, showing that in the zones with no change in mineralogy, local chemical equilibrium and decreasing gradients in calcium and hydroxyls between the core and the surface explain the precipitation of secondary phases, like AFm, ettingite and calcite.
Abstract: The changes occurring in the crystallised phases during degradation of an ordinary Portland cement have been studied. Leaching of cement paste with demineralised water generates a series of dissolution boundaries. Portlandite, then AFm, ettringite and calcite dissolve successively. In the zones with no change in mineralogy, local chemical equilibrium and decreasing gradients in calcium and hydroxyls between the core and the surface explain the precipitation of the secondary phases, like AFm, ettingite and calcite. Hydrogarnets in the surface layer in contact with the aggressive solution only dissolved slightly, or not at all. The very low solubility of hydrotalcites at pH values near neutrality explains the preciptation of these magnesium-containing phases in the surface layer.
47 citations
TL;DR: In order to obtain a deep understanding of the hydration of sprayed concrete, C3S pastes with and without aluminum sulfate (AS) were comparatively investigated in this paper.
47 citations
47 citations
TL;DR: In this article, the influence of composition of solid samples with fluidized bed combustion product, two types of cement binders and NaCl (as a chosen additive) on the compressive strength and the characteristics of microstructure of samples after 2 years of hardening were studied.
47 citations
TL;DR: In this paper, a lime-based low carbon cementitious material (LCM) was designed and prepared using low contents of hydrated lime and Portland cement and a high content of mineral admixtures.
47 citations