Influence of Metakaolin on Mechanical Properties of Fly Ash Geopolymer Mortar Reinforced with Steel Fibers

DOI: 10.14416/j.ind.tech.2023.07.006

Authors

  • Natcha Phudtisarigorn Department of Civil Engineering, Faculty of Engineering, Thammasat University
  • Peem Nuaklong Department of Civil Engineering, Faculty of Engineering, Thammasat University
  • Chanachai Thongchom Department of Civil Engineering, Faculty of Engineering, Thammasat University

Keywords:

High calcium fly ash, Metakaolin, Geopolymer mortar, Steel fiber

Abstract

This research aimed to study the influence of metakaolin on the properties of fly ash geopolymer mortar mixed with steel fibers. The metakaolin was used to replace high calcium fly ash at the percentages of 0, 10, 20, and 30 by weight. The effect of fiber content on the properties of the mortar was also studied. The slump flow, unit weight, compressive strength, and flexural strength were investigated. The results showed that the use of metakaolin at the percentages 10 and 30 have the highest value of compressive strength and flexural strength 4.21 and 5.06 MPa, respectively. Steel fibers can be used to increase compressive strength and flexural strength. However, the slump flow was decreased when the metakaolin and the fiber were added at the percentages 7.47 to 25.67 and 6.34 to 30.27, respectively. In addition, the unit weight of geopolymer mortar decreased at the percentage of 4.29 when metakaolin was increased. In contrast, the unit weight of geopolymer mortar was increased at the percentage of 6.06 by the addition of steel fiber. 

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Published

2023-07-31

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Section

บทความวิจัย (Research article)