Resistance of alkali-activated slag to sulphate attack and elevated temperatures
mahmoud, A., Kishar, E., Ahmed, D. (2018). Resistance of alkali-activated slag to sulphate attack and elevated temperatures. EKB Journal Management System, 35(part 1), 315-329. doi: 10.21608/jsrs.2018.25530
Ayaallah mahmoud; Essam A. Kishar; Doaa A. Ahmed. "Resistance of alkali-activated slag to sulphate attack and elevated temperatures". EKB Journal Management System, 35, part 1, 2018, 315-329. doi: 10.21608/jsrs.2018.25530
mahmoud, A., Kishar, E., Ahmed, D. (2018). 'Resistance of alkali-activated slag to sulphate attack and elevated temperatures', EKB Journal Management System, 35(part 1), pp. 315-329. doi: 10.21608/jsrs.2018.25530
mahmoud, A., Kishar, E., Ahmed, D. Resistance of alkali-activated slag to sulphate attack and elevated temperatures. EKB Journal Management System, 2018; 35(part 1): 315-329. doi: 10.21608/jsrs.2018.25530

Resistance of alkali-activated slag to sulphate attack and elevated temperatures

Journal of Scientific Research in Science
Article 11, Volume 35, part 1, August 2018, Page 315-329  XML PDF (2.1 MB)
Document Type: Original Article
DOI: 10.21608/jsrs.2018.25530
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Authors
Ayaallah mahmoud email 1; Essam A. Kishar2; Doaa A. Ahmed3
1Chemistry Dep., Faculty of Girls, Ain Shams University, Cairo, Egypt.
2Professor of inorganic chemistry, 2 Assistant prof. of inorganic chemistry, 3 Assistant lecture of inorganic and analytical chemistry
3Chemistry Dep., Faculty of Girls, Ain Shams University, Cairo, Egypt
Abstract
Thermal stability as well as sulphate resistance of alkali activated slag (AAS) pastes prepared from Ground Granulated Blast Furnace Slag (GGBFS) and 5% fly ash (FA)are examined. AAS pastes are accelerated using alkaline solution of sodium hydroxide with concentration 1, 1.5 and 2 M and sodium silicate with fixed concentration (0.28 mol/Kg).AAS pastes exposed to 5% MgSO4 solution and to high temperature (200, 400, 600 and 800 oC). The compressive strength, bulk density, total porosity, chemically combined water content and phase composition are determined in this study. Concentration of 2M NaOH with 5% FA promotes the best properties of AAS pastes that exhibit the highest resistance to firing up to 400oC by achieving the greatest compressive strength. However, AAS pastes activated by 2M NaOHgive a high sulphate resistance.
 
Keywords
Alkali activated slag; Fly Ash; Geopolymer materials; Sulphate and fire resistance
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