Effect of Temperature and Delay Time for Curing on Compressive Strength of Geopolymer Mortar Ground Fly ash

Authors

  • Nititron Simaung Faculty of Engineering, Rajamangala University of Technology Rattanakosin.
  • Sumrerng Rukzon Faculty of Engineering, Rajamangala University of Technology Rattanakosin.
  • Prinya Chindaprasirt Department of Civil Engineering, Faculty of Engineering.

Keywords:

compressive strength, delay time curing, ground fly ash, geopolymer, mortar, pozzolan

Abstract

This research examines the potential in developing ground fly ash as a geopolymer material. Geopolymer mortar ground fly ash with constant liquid to ash ratio was used for testing radiant flow value. Effect of temperature, delay time of curing, concentration of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) to sodium hydroxide (NaOH) ratio on compressive strength were investigated. Test results showed that the workable flow of geopolymer mortar was in the range of 107-113% and was dependent on the ratio by mass of sodium silicate to NaOH and concentration of NaOH. The geopolymer mortar ground fly ash with high strength was obtained with concentration of NaOH of 15M (15Molar, 15M) with the sodium silicate to NaOH ratio by weight of 1.5. Using ground fly ash as a geopolymer mixture, the compressive strength was gained by leaving the sample for 1 h (delay time) before being put into the oven, and the optimum curing temperature was 65 °C in 1 day curing period.

Author Biographies

Nititron Simaung, Faculty of Engineering, Rajamangala University of Technology Rattanakosin.

Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Rattanakosin, 96 Phuttamonthon Sai 5 Road. Salaya, Phuttamonthon, Nakhonpatom 73170, Thailand.

Sumrerng Rukzon, Faculty of Engineering, Rajamangala University of Technology Rattanakosin.

Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Rattanakosin, 96 Phuttamonthon Sai 5  Road. Salaya, Phuttamonthon, Nakhonpatom 73170, Thailand.

Prinya Chindaprasirt, Department of Civil Engineering, Faculty of Engineering.

Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of  Engineering, Khon Kaen University, 123 Moo 16 Mitraphap Road, Nai-Muang, Muang, Khonkaen 40002, Thailand.

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Published

2021-07-27

How to Cite

Simaung, N., Rukzon, S., & Chindaprasirt, P. (2021). Effect of Temperature and Delay Time for Curing on Compressive Strength of Geopolymer Mortar Ground Fly ash . Recent Science and Technology, 13(2), 369–381. Retrieved from https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/240891

Issue

Vol. 13 No. 2 (2021): May - Aug 2021

Section

Research Article

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