Rheological and hydration characterization of calcium sulfoaluminate cement pastes |
| |
| Authors: | Marta García-Maté Isabel Santacruz Ángeles G De la Torre Laura León-Reina Miguel AG Aranda |
| |
| Affiliation: | 1. Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale A. Avogadro, Viale T. Michel 11, 15121 Alessandria, Italy;2. Buzzi Unicem S.p.A., Via L. Buzzi 6, 15033 Casale Monferrato (AL), Italy;1. CEA, DEN, DTCD, SPDE, F-30207 Bagnols-sur-Cèze Cedex, France;2. LMCPA, Université de Valenciennes et du Hainaut Cambrésis, 59600 Maubeuge, France;3. Centre Commun de Mesure RMN, Université Lille1 Sciences Technologies, Cité Scientifique, 59655 Villeneuve d''Ascq Cedex, France;4. CEA, DEN, DPC, SECR, F-91192 Gif-sur-Yvette, France;5. Ecole des Mines de Douai, LGCgE-GCE, 59508 Douai, France;1. Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, 29071 Málaga, Spain;2. Servicios Centrales de Apoyo a la Investigación, Universidad de Málaga, 29071 Málaga, Spain;3. CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona, Spain |
| |
| Abstract: | Calcium sulfoaluminate (CSA) cements are currently receiving a lot of attention because their manufacture produces less CO2 than ordinary Portland cement (OPC). However, it is essential to understand all parameters which may affect the hydration processes. This work deals with the study of the effect of several parameters, such as superplasticizer (SP), gypsum contents (10, 20 and 30 wt.%) and w/c ratio (0.4 and 0.5), on the properties of CSA pastes during early hydration. This characterization has been performed through rheological studies, Rietveld quantitative phase analysis of measured X-ray diffraction patterns, thermal analysis and mercury porosimetry for pastes, and by compressive strength measurements for mortars. The effect of the used SP on the rheological properties has been established. Its addition makes little difference to the amount of ettringite formed but strongly decreases the large pore fraction in the pastes. Furthermore, the SP role on compressive strength is variable, as it increases the values for mortars containing 30 wt.% gypsum but decreases the strengths for mortars containing 10 wt.% gypsum. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
