Strength of Geopolymer Paste using a Ternary Blend of Fly Ash GGBFS and Silica Fume under Ambient Conditions
Ravi Kumar P1, Abhinav Bhandari2,Tika Devi Rai3, Jessy Rooby4, Sundararajan T5
1Ravikumar P, Associate professor, Dept. of Civil Eng., Hindustan Institute of Technology and Science (HITS), Chennai-603 103, India.
2Abhinav Bhandari, Graduate Student, Dept. of Civil Eng., Hindustan Institute of Technology and Science (HITS), Chennai-603 103, India.
3Tika Devi Rai , Graduate Student, Dept. of Civil Eng., Hindustan Institute of Technology and Science (HITS), Chennai-603 103, India.
4Jessy Rooby, Professor, Dept. of Civil Eng., Hindustan Institute of Technology and Science (HITS), Chennai-603 103, India.
5Sundararajan.T, Professor of Civil Engineering (Retd.), Pondicherry Engg., college, Pondicherry – 306105, India.
Manuscript received on 23 August 2019. | Revised Manuscript received on 05 September 2019. | Manuscript published on 30 September 2019. | PP: 3784-3790 | Volume-8 Issue-11, September 2019. | Retrieval Number: K21560981119/2019©BEIESP | DOI: 10.35940/ijitee.K2156.0981119
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this paper, compressive strength (CS) of geopolymer paste has been studied under ambient conditions using locally available Class C fly ash, GGBFS and silica fume and a combination alkali activator, namely: NaOH and Na2SiO3 . Two approaches were used for mix proportioning and 60 mixes of the paste were proportioned. It is found that all the mixes proportioned were workable and no adverse effects were observed within 30 minutes of mixing. It is found that the ‘minimum voids’ approach along with a constant fly ash – to – activator ratio (FA/AA) is the best approach for the design of geopolymer mixes, rather than a constant water- to- solid ratio (w/s). Further, the role of GGBFS and SF on the CS of the paste has also been highlighted.
Keywords: Fly ash (FA), GGBFS, Silica fume (SF), Alkali Activators, Mix design, Compressive strength, Geopolymer paste.
Scope of the Article: Software Analysis, Design and Modelling