Sulfate resistance of ordinary Portland cement with fly ash

Autor:	Edgardo F. Irassar, Oscar R. Batic
Jazyk:	English<br />Spanish; Castilian
Rok vydání:	1989
Předmět:	fly ash sulfate resistance flexural strength x-ray analysis mortars (material) Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materiales de Construccion, Vol 39, Iss 213, Pp 11-20 (1989)
Druh dokumentu:	article
ISSN:	0465-2746 1988-3226
DOI:	10.3989/mc.1989.v39.i213.813
Popis:	Low calcium fly ash has demonstrated to be an effective pozzolan to improve sulfate resistance of ordinary portland cement (type I). In this paper physico-chemical effects that produce this pozzolan in the mortar exposed to sulfate attack are studied. Dilution and dispersion affects are analyzed using mixes of cement with an inert mineral admixture. Mineralogical changes of mortar are studied using X-ray diffraction and the help of scanning electron microscope. The results show that fly ash delays mortar cracking phenomenon due to less content of unstable compounds in sulfate environment, greater available space to be occupied by expansive compounds and less CH present in the mortars.
Databáze:	Directory of Open Access Journals
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