MATEC Web Conf.
Volume 149, 20182nd International Congress on Materials & Structural Stability (CMSS-2017)
|Number of page(s)||4|
|Section||Session 1 : Materials & Pathologies|
|Published online||14 February 2018|
Ternesite as a component of sulfobelitic cements
Instituto de Ciencias de la Construcción Eduardo Torroja, Cements and Recycling Materials Department, Madrid, Spain
The cement industry is presently devoting substantial effort to the development of less energy intensive, lower emission cements. Calcium sulfoaluminate (CSA) cements, one of the most promising alternatives, are known as ‘eco-cements’ in light of their lower energy costs and GHG emissions. Whilst their clinker composition may vary, all these cements lie in the CaO-Al2O3-SiO2-Fe2O3-CaSO4 system, with constituent minerals that include C2A, C2S, C12A7, CA, CŜ, and C4AF. Ternesite (C5S2Ŝ), a phase compatible with ye’elemite (C4A3Ŝ) and C2S, can also be found in that system.Recent studies show that it is activated and hydrated in the presence of AH3 and gypsum, yielding ettringite and C-S-H gel, the main hydration products of CSA and OPC, respectively, as well as C2ASH8.This study analyses ternesite reactivity in different aluminate blends.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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