Alkali–aggregate reaction in activated fly ash systems

Certain aspects of the durability of a new cementitious material, alkali activated fly ash, are addressed in this article; specifically, a series of findings relating to the alkali-silica reaction are reported. The approach adopted in the study was to compare the new cementitious systems to analogou...

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Bibliographic Details
Published in:Cement and concrete research 2007-02, Vol.37 (2), p.175-183
Main Authors: García-Lodeiro, I., Palomo, A., Fernández-Jiménez, A.
Format: Article
Language:English
Subjects:
Alkali-activated fly ash
Alkali–aggregate reaction
Applied sciences
Buildings. Public works
Concretes. Mortars. Grouts
Corrosion
Durability. Pathology. Repairing. Maintenance
Exact sciences and technology
General (composition, classification, performance, standards, patents, etc.)
Materials
NBRI test
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Summary:Certain aspects of the durability of a new cementitious material, alkali activated fly ash, are addressed in this article; specifically, a series of findings relating to the alkali-silica reaction are reported. The approach adopted in the study was to compare the new cementitious systems to analogous Portland cement mortars using aggregates of differing reactivity and a procedure based on the test described in ASTM standard C 1260. The results of SEM/EDX and XRD analysis of the materials showed that activated fly ash mortars performed better than the Portland cement equivalents.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2006.11.002