Development of Fly Ash based Geopolymer behaviour of Fly Cement

P. Yellaiah; Sanjay Kumar Sharma; T.D. Guneshwara Rao

doi:10.15415/jotitt.2014.21003

Authors

P. Yellaiah research Scholar in Civil engineering, Department, NITTTR, Chandigarh.
Sanjay Kumar Sharma Research Scholar in Civil engineering, Department, NITTTr, Chandigarh.
T.D. Guneshwara Rao ssociate Professor, Civil engineering Department, National Institute of Technology, warangal (A.P)

DOI:

https://doi.org/10.15415/jotitt.2014.21003

Keywords:

Geopolymer, alkaline activator, consistency, setting times

Abstract

Geopolymer is a novel binding material produced from the reaction of fly ash with an alkaline activator liquid; ensure durability and environmental sustainability and is emerging greener alternative to Ordinary Portland cement in the construction field. In this research, the influence of various parameters on the consistency and setting times of low-calcium fly ash-based geopolymer cement under varied heat curing temperature were investigated. Systematic trials were carried to optimise the normal consistency and setting times over a number of parameters. The consistency of the geopolymer cement does not show any variation when mixed with different combinations of alkaline activator solution; whereas the setting times were observed to be dependent on the concentration of NaOH solution, ratio of alkaline activator liquid and variation in temperature. The test results revealed that the normal consistency of the fly ash-based geopolymer paste is found to be at 28% of alkaline activator solution for all the selected mixtures. Wherein, increase in concentration of NaOH solution increases setting times; increase in alkaline liquid ratio decreases setting times up to certain limits viz; increase in alkaline liquid ratio from 1.5 to 2.0, decreases setting times; further increase in alkaline liquid ratio from 2.0 to 2.5, increases setting times. The setting times were observed as decreased when the alkaline liquid ratio increased from to 2.5 to 3.0.

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References

[1] Mehta P.K., (1997)Durability – Critical Issues for the Future, ACI Concrete International, 19 (7): pp. 27-33.
[2] Malhotra V.M., (2002b) Introduction: Sustainable Development and Concrete Technology, ACI Concrete International, 24 (7): pp. 22.
[3] Mehta, P.K., (2001)Reducing the Environmental Impact of Concrete, ACI Concrete International, 23 (10): pp. 61-66.
[4] Radhakrishna., Renuka Devi M.V., and Udayashankar B.C., (2009) Use of Fly ash in Construction industries for Sustainable Development, Journal of Environmental Research And Development 3 (4): pp. 1212.
[5] Davidovits J. Comrie D.C., Paterson J.H., and Ritcey D.J., (1990) Geopolymeric Concretes for Environmental Protection , ACI Concrete International, 12 (7): pp. 30-40.
[6] Daniel K., Sanjayan J., and Sagoe-Crentsil K., (2006) The Behaviour of Geopolymer Paste and Concrete at Elevated Temperatures, International Conference on Pozzolan, Concrete and Geopolymer, Khon Kaen, Thailand, pp. 105 – 118.
[7] Suresh Thokchom., Dr. Partha Ghosh., and Dr. Somnath Ghosh., (2009)“Resistance of Fly ash based Geopolymer mortar in Sulfuric acid”, ARPN Journal of engineering and Applied Sciences, 4(1): February 2009
[8] Dhir R.K., Hubbard F. H., Munday J.G.l., Jones M .R., Duerden S.l ., (1988) Contribution of PFA to concrete workability and strength development, Cem Concr Res., 18(2): pp. 277–89. http://dx.doi.org/10.1016/0008-8846(88)90012-9
[9] P.T. Fernando., C.G. Joao., and J. Said., (2008) “Alkali-activated binders: A review Part 1.Historical background, terminology, reaction mechanisms and hydration products”, Construction Building material, no. 22, pp. 1305-1314. http://dx.doi.org/10.1016/j.conbuildmat.2007.10.015
[10] P.K. Meheta., (1991) “Durability of concrete: Fifty years of Progress”, ACI SP 126,
[11] V.M.malhotra, ed., pp. 1-32.V.m.malhotra., (2002)“High-performance high volume fly ash concrete”, ACI Concrete International, 7(24): pp. 1-5.
[12] R.N. Tarun., (1989) “High strength concrete containing large quantities of fly ash”, ACI material Journal, pp. 111-116.
[13] D.Hardjito., S.E. Wallah., D.M.J. Sumajouw., and V. Rangan., (2005) “Fly ash-based geopolymer concrete”, Australian Journal of Structural engineering, no. 6, pp. 1-9,
[14] D.Hardjito., and V. Rangan., (2005) “Development and properties of low calcium fly ash-based geopolymer concrete”, Research Report GC, Faculty of engineering, Curtin University of Technology, Perth, Australia, pp. 1-130.
[15] R. Matthew., and O.C. Brian., (2003) “Chemical optimisation of the compressive strength of aluminosilicate geopolymers synthesized by sodium silicate activation of metakaolinite”, Journal of material Chem., no. 13, pp.1161-1165.