SHEAR BOND STRENGTH OF FA-PC GEOPOYLMER UNDER DIFFERENT SAND TO BINDER RATIOS AND SODIUM HYDROXIDE CONCENTRATIONS

Authors

  • Tanakorn Phoo-ngernkham Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima, THAILAND
  • Sakonwan Hanjitsuwan Faculty of Industrial Technology, Lampang Rajabhat University, THAILAND
  • Satakhun Detphan Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima, THAILAND
  • Jaksada Thumrongvut Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima, THAILAND
  • Cherdsak Suksiripattanapong Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima, THAILAND
  • Nattapong Damrongwiriyanupap School of Engineering, University of Phayao, THAILAND
  • Prinya Chindaprasirt Faculty of Engineering, Khon Kaen University, THAILAND
  • Shigemitsu Hatanaka Faculty of Engineering, Mie University, JAPAN

Keywords:

Geopolymer, Fly ash-Portland cement blends, Sand to binder ratio, NaOH concentration, Shear bond strength

Abstract

This paper presents the effects of sand to binder (S/B) ratio and sodium hydroxide (NaOH)
concentration on setting time, compressive strength, and shear bond strength of fly ash (FA)-Portland cement
(PC) geopolymer binder. Geopolymer binder is manufactured from FA and PC at the ratio of 90:10 by weight
of binder. The liquid alkali solution used in this study are sodium hydroxide (NaOH) and sodium silicate
(Na2SiO3) solutions. The Na2SiO3/NaOH ratio of 2.0, liquid alkali solution/binder ratio of 0.60, and curing
at ambient temperature are fixed in all mixes. The differences in NaOH concentrations of 5, 10 and 15M and
S/B ratios of 1.00, 1.25 and 1.50 has been investigated. Test results show that the differences of NaOH
concentration and S/B ratio has an effect on setting time, compressive strength and shear bond strength of
FA-PC geopolymer mortar. The setting time of mortars are obviously decreased with increasing of S/B ratio
whereas the setting time of mortars are obviously increased with increasing of NaOH concentration.
The compressive and shear bond strengths of mortars increase as increasing of both S/B ratio and NaOH
concentration up to a threshold limit. The highest slant shear strength between Portland cement concrete
substrate and FA-PC geopolymer mortar is found in the mortar with 1.25 S/B ratio and 10M NaOH
concentration which gives 24.1 MPa.

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Published

2018-02-27

How to Cite

Tanakorn Phoo-ngernkham, Sakonwan Hanjitsuwan, Satakhun Detphan, Jaksada Thumrongvut, Cherdsak Suksiripattanapong, Nattapong Damrongwiriyanupap, Prinya Chindaprasirt, & Shigemitsu Hatanaka. (2018). SHEAR BOND STRENGTH OF FA-PC GEOPOYLMER UNDER DIFFERENT SAND TO BINDER RATIOS AND SODIUM HYDROXIDE CONCENTRATIONS. GEOMATE Journal, 14(42), 52–57. Retrieved from https://geomatejournal.com/geomate/article/view/665

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