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, the performance of traditional reactive powder concrete (RPC) with rich cement and high volume of fly-ash reactive powders concrete (FRPC) were studied and the results showed that both types of RPC have higher compressive strength, less volume shrinkage ratio and better carbonation-, chloride-, freezing resistances than conventional concrete.
Abstract: Durability of traditional reactive powder concrete (RPC) with rich cement and high volume of fly-ash reactive powder concrete (FRPC) were studied. The X-diffraction and scanning electron microscope (SEM) measurement was imployed to analyze the microstructure. The results show that both types of RPC have higher compressive strength, less volume shrinkage ratio and better carbonation-, chloride-, freezing-resistances than the conventional concrete. The results of X-diffraction indicate that they basically have C-S-H as the main composition without Ca(OH)2 crystal and ettringite. SEM results show that hydration products of FRPC is mainly III-C-S-H which is piled up closely like densely arranged stone body and it has very compacted structure, in addition, Ca/Si ratio of C-S-H gel is lower than 1.5.
34 citations
TL;DR: In this article, the formation of ettringite was investigated by isothermal calorimetry over the range of temperature from 50 to 70°C using three sources of alumina: tricalcium aluminate, high alumina cement and calcium aluminate sulfate.
33 citations
Journal Article•
TL;DR: The Charlesite analogue of sturmanite hexagonal is the probable space group P31c with a = 1116(1), c = 2121(2)angstrom as discussed by the authors.
Abstract: Charlesite, ideally Ca 6 (Al,Si) 2 (SO 4 ) 2 (B(OH) 4 )(OH,O) 12 26H 2 O, is the Al analogue of sturmanite Hexagonal, probable space group P31c, with a = 1116(1), c = 2121(2)angstrom--Modified journal abstract
33 citations
TL;DR: In this paper, suspension hydration of C3A with gypsum (in the molar ratio of 1:3) was investigated at room temperature and water/solid ratio of 4.
33 citations
TL;DR: In this article, the damage process of cement pastes exposed to different sulfate solutions was in situ quantitatively investigated by X-ray computed tomography (X-ray CT), and the results showed that the three-dimensional crack distribution of Cement pastes for different immersion times can be extracted by using Xray CT.
33 citations