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Parametric Optimization of Alkali Activated F-Type Flyash-Based Geopolymer Concrete

Kolli Ramujee*, P. Hanumantha Rao**, M. Potharaju***, Radhakrishna****

* Associate Professor, Department of Civil Engineering, VNR VignanaJyothi Institute of Engineering & Technology, Hyderabad.

** P.G student, Department of Civil Engineering, VNR VignanaJyothi Institute of Engineering & Technology, Hyderabad

*** Professor of Civil Engineering, GITAM University, Visakhapatnam.

**** Dean P.G studies, R V College of Engineering, Bangalore.

Periodicity:March - May'2014
DOI : https://doi.org/10.26634/jste.3.1.2980

Abstract

This paper describes the effects of various optimized parameters on the properties of fly ash based geopolymer concrete, especially the compressive strength, density and workability have been investigated. The effect of various optimized parameters related to alkaline activator such as molar concentration of sodium hydroxide solution in the range of 8M-16M, mass ratio of alkaline liquid to fly-ash in the range of 0.4 and 0.33, the rest period in the range of 1- 5days, the curing time and curing temperature in the range of 24-72 hours and 60-100°C respectively were considered. The geopolymer concrete test specimens of cube size 150 x 150 x 150 mm were tested for their compressive strength at the age of 3,7 ,14 and 28 days. The compressive strength of geopolymer concrete ranging from 24 to 63MPa have been developed. Test results show that the compressive strength increases with increase in molar concentration of sodium hydroxide solution duration of oven curing, curing temperature and rest period .The compressive strength of geopolymer concrete decreases with increase in Alkaline liquid to Fly ash ratio. For alkaline liquid, the ratio of Sodium Silicate solution to Sodium hydroxide solution was fixed as 2.5 and the dosage of Super plasticizer maintained constant as 2 % by weight of fly ash. The experimental investigation concludes that some parameters are in disagreement with the results reported in past literature and some other parameters are in agreement with the available literature.

Keywords

Keywords: Geopolymer Concrete, Fly Ash, Alkaline Activator, Compressive Strength.

How to Cite this Article?

Ramujee, K., Hanumantharao, R., Potharaju, M., and Radhakrishna (2014). Parametric Optimization of Alkali Activated F-Type Flyash-Based Geopolymer Concretee. i-manager’s Journal on Structural Engineering, 3(1), 13-19. https://doi.org/10.26634/jste.3.1.2980

References

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[8]. KolliRamujee ,M.Potharaju (2013). “Development of mix design for Low calcium based Geopolymer concrete in Ordinary, Standard and high strength grades”. Indian Concrete Institute Journal, Vol. 14, No 2, pp. 29-34.

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