Role of Slag Replacement on Strength Enhancement of One-Part High-Calcium Fly Ash Geopolymer

One-Part Geopolymer Slag Replacement Strength Development Fly Ash Based Geopolymer.

Authors

  • Darrakorn Intarabut Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Phra Nakhon, Bangkok,, Thailand
  • Piti Sukontasukkul
    piti.s@eng.kmutnb.ac.th
    Construction and Building Materials Research Center, Department of Civil Engineering, King Mongkut's University of Technology North Bangkok, Bangkok 10800,, Thailand https://orcid.org/0000-0002-9580-7063
  • Tanakorn Phoo-ngernkham Sustainable Construction Material Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000,, Thailand
  • Sakonwan Hanjitsuwan Department of Survey and Geomatics Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000,, Thailand
  • Vanchai Sata Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002,, Thailand
  • Poopatai Chumpol Construction and Building Materials Research Center, Department of Civil Engineering, King Mongkut's University of Technology North Bangkok, Bangkok 10800,, Thailand
  • Worathep Sae-Long Department of Civil Engineering, Faculty of Engineering, Phayao University, Phayao 56000,, Thailand
  • Hexin Zhang School of Computing, Engineering and the Built Environment, Edinburgh Napier University, Edinburgh EH10 5DT, Scotland,, United Kingdom
  • Prinya Chindaprasirt 5) Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand. 8) Academy of Science, Royal Society of Thailand, Dusit, Bangkok 10300, Thailand.
Vol. 10 (2024): Special Issue "Sustainable Infrastructure and Structural Engineering: Innovations in Construction and Design"
Special Issue "Sustainable Infrastructure and Structural Engineering: Innovations in Construction and Design"

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This paper reports the effect of slag (SL) replacement and water-to-binder (w/b) ratio on properties of one-part geopolymer derived from high-calcium fly ash (FA) and sodium silicate powder (NP). The FA was replaced by SL at the rates of 20% and 40%, respectively. This study focused on conducting experimental tests to evaluate the relative slump, setting time, compressive strength, and flexural strength of one-part FA-based geopolymer. The relationship between compressive and flexural strengths of one-part geopolymer mortar was expressed using the simplified linear regression model, whereas the normalization of compressive and flexural strengths with SL replacement by the strength of one-part geopolymer mortar without SL as the divisor was also evaluated. Experimental results showed that the increase of SL replacement and w/b ratio significantly affected the workability and strength development of one-part geopolymer mortar. Higher SL replacement exhibited a positive effect on their compressive and flexural strengths; however, a reduction in its setting time was obtained. The enhancement in strength development of one-part geopolymer was primarily due to the increased calcium content of SL. Similarly, reducing the w/b ratio in the production of one-part geopolymer resulted in a decrease in setting time and an increase in strength development. Based on the relationship between compressive and flexural strengths, the prediction coefficient value (R2) obtained from the curve fitting procedure was 0.835, indicating a good level of reliability and acceptability for engineering applications.

 

Doi: 10.28991/CEJ-SP2024-010-013

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