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IJSTR >> Volume 9 - Issue 6, June 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Improving The Microstructure And The Strength Of Alkali Activated Slag Mortar Under Ambient Temperature

[Full Text]



A. Maher El-Tair, Ramez Bakheet, M.S. El-Feky, Mohamed Kohail, Mohamed I. Serag



Alkali Activated Slag, Ground granulated blast furnace slag, GGBFS, Compressive Strength, pH, SEM, Temperature.



Alternative building materials for sustainable and eco-friendly development are now a major environmental issue in the construction industry. Over the last decades, Alkali Activated Material (AAM) has shown a remarkable development as an alternative material to ordinary cement-based concrete. The AAM uses an alumino-silicate powder as a total replacement of cement. The reaction between a source of alumino-silicate and alkaline solution, under thermal treatment, to form a binding material have the same product resulting from the reaction of ordinary cement and water in concrete. In this paper, the effect of different percentages of Na2O and the activator modulus and water to binder ratio on the fresh and mechanical properties of mortar. Fresh properties were studied through studying the temperature, pH, and mortar flow test. While the mechanical properties were examined through compressive strength. Also, a microstructure analysis was examined through Scanning Electron Microscopy (SEM) and X-Ray Diffraction analysis (XRD). The results showed that increasing the percentage of Na2O% and Ms and results in an increase in the compressive strength of Alkali Activated Slag (AAS) to a certain limit, exceeding these limits lead to undesirable results with respect to strength.



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