Natural Pozzolan as a Partial Substitute for Cement in Concrete

Ghassan K. Al-Chaar*, 1, Mouin Alkadi2, Panagiotis G. Asteris3
1 Research and Development Center (ERDC), Construction Engineering Research Laboratory, Champaign, IL, USA
2 Techno Advanced Building Material Company. Damascus Road, Sweda, Syria
3 Computational Mechanics Laboratory,School of Pedagogical and Technological Education, 141 24 Heraklion, Athens, Greece

Article Metrics

CrossRef Citations:
Total Statistics:

Full-Text HTML Views: 2360
Abstract HTML Views: 2856
PDF Downloads: 1975
Total Views/Downloads: 7191
Unique Statistics:

Full-Text HTML Views: 1120
Abstract HTML Views: 1494
PDF Downloads: 1422
Total Views/Downloads: 4036

Creative Commons License
© 2013 K. Al-Chaar et al.;

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: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Construction Engineering Research Laboratory, Champaign, IL, USA.Tel: 217-373-7247; Fax: 217-722-3320; E-mail:


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.