AUTHOR=Sánchez-Herrero M. J. , Fernández-Jiménez Ana , Palomo A. 

TITLE=Studies About the Hydration of Hybrid “Alkaline-Belite” Cement

JOURNAL=Frontiers in Materials

VOLUME=6

YEAR=2019

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2019.00066

DOI=10.3389/fmats.2019.00066

ISSN=2296-8016

ABSTRACT=<p>The mechanical performance of a hybrid cement containing 48% fly ash, 48% mineralized belite clinker, 1. 5% gypsum and 2.5% Na<sub>2</sub>SO<sub>4</sub> was analyzed and the hydration products were identified. The findings showed that the newly designed cement met European standard EN 197-1 compositional, mechanical and setting time requirements (cement type IVB). The hydration products forming in this blended “alkaline-belite” cement (as it was determined through XRD, <sup>29</sup>Si and <sup>27</sup>Al MAS NMR and electron microscopy) consisted in a mix of cementitious gels: C-(A)-S-H and N-(C)-A-S-H, which interacted and over time evolved toward the latter with no detriment to the mechanical strength developed by the cement.</p>