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Natural Pozzolan as a Partial Substitute for Cement in Concrete
The Open Construction and Building Technology Journal
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12 July 2013 •
RESEARCH ARTICLE
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DOI: 10.2174/1874836801307010033
Abstract
In this paper, the use of natural pozzolan as a partial cement substitute in concrete materials is investigated. By means of a test series, four mixes using three types of natural pozzolan, as well as a Class F fly ash, are evaluated. The effectiveness of each pozzolan in controlling alkali-silica reactions has been studied. Correlations have been revealed between the mechanical properties of the proposed mixes and a Portland cement control mix. The results are also compared with industry standards for mortars made with fly ash and silica fume. The paper's findings indicate that one type of pozzolan may be used as a substitute for fly ash, but not for silica fume.
Keywords: Natural pozzolan, cement replacement, concrete, mortar, fly ash, mechanical properties, silica fume.