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Titre :
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Effect on fresh C-S-H gels of the simultaneous addition of alkali and aluminium
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Auteurs :
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I. García Lodeiro, Auteur ;
A. Fernandez-Jimenez, Auteur ;
A. Palomo, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Cement and concrete research (Vol. 40 N° 1, Janvier 2010)
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Article en page(s) :
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pp. 27-32
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Note générale :
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Génie Civil
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Langues :
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Anglais
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Index. décimale :
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691 (Matériaux de construction. Pièces et parties composantes)
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Tags :
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Calcium-Silicate-Hydrate (C-S-H) Spectroscopy TEM Stratlingite
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Résumé :
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Reducing Portland cement content in cementitious binders offers a means to address the adverse environmental impacts of Portland cement manufacture. This paper investigates the impacts on hydration product chemistry of partially replacing Portland cement with alkali-activated aluminosilicates. Here, short-term effects of soluble alkali and aluminium, likely to be available in an alkali-activated system, on the structure of synthetic C-S-H gels are assessed. .C-S-H gels (synthesized at pH values of over 13) were mixed with different concentrations of aluminium nitrate and sodium hydroxide. The gels were characterized by FTIR, TEM/EDX and XRD 72 h later. The results showed that both alkali and aluminium increased the degree of silicate polymerisation in the C-S-H gels and precipitated a crystalline calcium aluminosilicate phase.
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DEWEY :
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620.13
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ISSN :
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0008-8846
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En ligne :
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http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWG-4X5YWSN-2&_user=6909337&_coverDate=01%2F31%2F2010&_rdoc=5&_fmt=high&_orig=browse&_srch=doc-info%28%23toc%235562%232010%23999599998%231564180%23FLA%23display%23Volume%29&_cdi=5562&_sort=d&_doca
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