Ziyad  Kubba, Esam  Hewayde, Ghasan  Fahim Huseien, Abdul  Rahman Mohd Sam, Mohammad  Ali Asaad, 
    Effect of Sodium Silicate Content on Setting Time and Mechanical Properties of
Multi Blend Geopolymer Mortars,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 7,
    2019,
    Pages 2262-2267,
    ISSN 1816-949x,
    jeasci.2019.2262.2267,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.2262.2267)
    Abstract: The incorporation of industrial waste in geopolymer concrete opens new era in the construction
industry because of the positive environmental impact. In this study, the effect of using sodium silicate as an
activator on some fresh and hardened properties of geopolymer mortar naming, setting time, workability,
density, water absorption, compressive strength, tensile strength and flexural strength were investigated.
Industrial waste materials including glass powder, low calcium fly ash, granulated blast furnace slag and ceramic
powder were used to prepare specimens of the geopolymer mortars. Results showed that the workability,
represented by flow test and water absorption of the geopolymer mortars decreased as the content of the
activator (sodium silicate) increased. Both initial and final setting time of the geopolymer mortars were found
to be decreased as a response of increasing the content of the activator up to a certain content of the activator.
Compressive, tensile and flexural strengths significantly increased as a result of increasing the sodium
silicate.
    Keywords: Geopolymer mortar;sodium silicate;workability;compressive strength;flexural strength;water
absorption