The effect of age on Alkali-Activated Geopolymer mortar at ambient temperature

International Journal of Civil Engineering

© 2016 by SSRG - IJCE Journal

Volume 3 Issue 12

Year of Publication : 2016

Authors : Pradeep U, PurushothamRao S, Markandeya Raju P

10.14445/23488352/IJCE-V3I12P103

How to Cite?

Pradeep U, PurushothamRao S, Markandeya Raju P, "The effect of age on Alkali-Activated Geopolymer mortar at ambient temperature," SSRG International Journal of Civil Engineering, vol. 3,  no. 12, pp. 16-21, 2016. Crossref, https://doi.org/10.14445/23488352/IJCE-V3I12P103

Abstract:

 In this research an investigation on effect of age on Compressive strength of Alkali-activated Geopolymer Mortar (GPM). GPM cubes were (70.7 mm cube) prepared by using industrial by-products such as Ground Granulated Blast Furnace Slag (GGBS) and Silica fume (SF). These binders are adopted as full replacement to Ordinary Portland cement (OPC). However, Quartz sand is used as a fine aggregate as full replacement to river sand. A small quantity of Gypsum is added to control the setting times of the mix in the presence of alkaline medium. The alkaline liquid is a combination of Sodium Hydroxide Solution (NaOH) and Sodium Silicate Solution (Na2SiO3). Various salient parameters were studied to investigate the effect of age on compressive strengths of GPM. Those were Molarity of NaOH (9M, 13M and 19M), concentration of Na2SiO3 (20%, 35% and 50%) and age of specimen (7, 28, and 56 days). A constant binder-to-fine aggregate (B: FA) ratio of 1:5 and alkaline solution-to-binder (A/B) ratio of 0.8 is adopted. These Mortar cubes cured under ambient air temperature. Results show that Mortar incorporating GGBS and SF had higher compressive strength at 56 days with 13M NaOH, 35% Na2SiO3. These results are most promisingfrom both strength and environmental point of view.

Keywords:

Geopolymer Mortar, Compressive strength, GGBS, Silica fume, Alkali activated, Ambient air temperature.

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