Natural Pozzolan as a Partial Substitute for Cement in Concrete
Ghassan K. Al-Chaar*, 1, Mouin Alkadi2, Panagiotis G. Asteris3
Identifiers and Pagination:Year: 2013
First Page: 33
Last Page: 42
Publisher ID: TOBCTJ-7-33
Article History:Received Date: 5/05/2013
Revision Received Date: 14/06/2013
Acceptance Date: 18/06/2013
Electronic publication date: 12/7/2013
Collection year: 2013
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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.