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 article, two different types of sulfuric acids, i.e., the biological sulfuric acid (BSA) produced by T.t bacteria (Thiobacillus thiooxidans) and chemical sulfuric alcohol (CSA), were applied to simulate the corrosion.
28 citations
TL;DR: In this paper, the sulfate resistance of concrete was tested using drying-immersion cycles of varying duration in different sulfate solutions, and measured expansion in the different protocols showed a correlation to sulfate profiles in the test specimens determined by EDX.
Abstract: The sulfate resistance of concrete was tested using drying-immersion cycles of varying duration in different sulfate solutions. The measured expansion in the different protocols showed a correlation to the sulfate profiles in the test specimens determined by EDX. Based on the magnitude of expansion and the test duration, a suitable protocol for testing job-site concrete was identified. A matrix of 20 concrete mixtures was tested with this protocol. The test permitted to distinguish the effect of cement type, w/c and paste volume on expansion. Measurements of the dynamic E-modulus made it possible to link expansion and mechanical damage and to define a limit value for expansion. As this test appears to be suitable to determine the potential of concrete for expansion induced by ettringite formation due to sulfate ingress, it was introduced into the Swiss norms.
28 citations
TL;DR: In this paper, the authors investigated the growth and nucleation processes of ettringite using the classical nucleation theory and an interfacial crystal-solution energy was determined, showing that after the initial primary homogeneous nucleation, when the surface of already formed crystals was still low, the precipitation rate depended almost exclusively on the solution supersaturation.
28 citations
28 citations
TL;DR: In this paper, the effect of cement, inorganic wastes, and straw fibre on the properties of flue gas desulfurization (FGD) gypsum was investigated.
28 citations