Calcium aluminate cement hydration in a high alkalinity environment
The present paper forms part of a broader research project that aims primarily to devise new cementitious products via the alkali activation of silico-aluminous materials. This work addresses the possibility of using small percentages of calcium aluminate cement (CAC) as a source of reactive alumini...
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Consejo Superior de Investigaciones Científicas
2009-03-01
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doaj-bfa22b8eb202416ba254c35c93f856e32021-05-05T07:36:30ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262009-03-0159293213410.3989/mc.2009.42407119Calcium aluminate cement hydration in a high alkalinity environmentC. Pastor0A. Fernández-Jiménez1T. Vázquez2Á. Palomo3Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC)Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC)Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC)Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC)The present paper forms part of a broader research project that aims primarily to devise new cementitious products via the alkali activation of silico-aluminous materials. This work addresses the possibility of using small percentages of calcium aluminate cement (CAC) as a source of reactive aluminium. For this reason, a preliminary review was needed of the behaviour of CACs in highly alkaline media (2, 8 and 12M NaOH solutions). Two, 28- and 180-day mechanical strength was determined and the reaction products were characterized with XRD and FTIR. The water-hydrated CAC was used as the control. The results obtained showed that CAC hardening took place much more slowly in highly alkaline media than in water. Nonetheless, the 28-day compressive strength obtained, ≥80MPa. As main reaction products, to ambient temperature and from the two days of cured, cubic aluminate C3AH6), and AH3 polymorphs are formed, instead of the usual hexagonal aluminatos (CAH10 and C2AH8) that are formed in the normal hydrate with water.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/124alkali activationcalcium aluminate cement (cac)xrdftir |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
C. Pastor A. Fernández-Jiménez T. Vázquez Á. Palomo |
spellingShingle |
C. Pastor A. Fernández-Jiménez T. Vázquez Á. Palomo Calcium aluminate cement hydration in a high alkalinity environment Materiales de Construccion alkali activation calcium aluminate cement (cac) xrd ftir |
author_facet |
C. Pastor A. Fernández-Jiménez T. Vázquez Á. Palomo |
author_sort |
C. Pastor |
title |
Calcium aluminate cement hydration in a high alkalinity environment |
title_short |
Calcium aluminate cement hydration in a high alkalinity environment |
title_full |
Calcium aluminate cement hydration in a high alkalinity environment |
title_fullStr |
Calcium aluminate cement hydration in a high alkalinity environment |
title_full_unstemmed |
Calcium aluminate cement hydration in a high alkalinity environment |
title_sort |
calcium aluminate cement hydration in a high alkalinity environment |
publisher |
Consejo Superior de Investigaciones Científicas |
series |
Materiales de Construccion |
issn |
0465-2746 1988-3226 |
publishDate |
2009-03-01 |
description |
The present paper forms part of a broader research project that aims primarily to devise new cementitious products via the alkali activation of silico-aluminous materials. This work addresses the possibility of using small percentages of calcium aluminate cement (CAC) as a source of reactive aluminium. For this reason, a preliminary review was needed of the behaviour of CACs in highly alkaline media (2, 8 and 12M NaOH solutions). Two, 28- and 180-day mechanical strength was determined and the reaction products were characterized with XRD and FTIR. The water-hydrated CAC was used as the control.
The results obtained showed that CAC hardening took place much more slowly in highly alkaline media than in water. Nonetheless, the 28-day compressive strength obtained, ≥80MPa. As main reaction products, to ambient temperature and from the two days of cured, cubic aluminate C3AH6), and AH3 polymorphs are formed, instead of the usual hexagonal aluminatos (CAH10 and C2AH8) that are formed in the normal hydrate with water. |
topic |
alkali activation calcium aluminate cement (cac) xrd ftir |
url |
http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/124 |
work_keys_str_mv |
AT cpastor calciumaluminatecementhydrationinahighalkalinityenvironment AT afernandezjimenez calciumaluminatecementhydrationinahighalkalinityenvironment AT tvazquez calciumaluminatecementhydrationinahighalkalinityenvironment AT apalomo calciumaluminatecementhydrationinahighalkalinityenvironment |
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