Early-Age Properties of Slag-Fly Ash Blended Geopolymer Concrete Reinforced with Glass Fibers – A Preliminary Study

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

– This research investigates the effect of additional water content, glass fibers addition, glass fiber length, and the handling time on the workability, 1-and 7-day compressive strength, and 7-day splitting tensile strength of slag-fly ash blended geopolymer concrete. The additional water content ranged from 0 to 100 kg/m3. Two types of glass fibers were used with lengths of 24 and 43 mm and incorporated by up to 2 and 1.5%, by volume, respectively. Also, the handling time, representing the time from mixing to casting, was varied. The experimental results showed that the additional water content led to a significant increase in the slump and decrease in the 1-and 7-day compressive strengths of plain geopolymer concrete. A value of 75 kg/m3 was required to attain a slump of 150 mm and 7-day compressive strength of 35 MPa. Furthermore, the addition of 24-mm long glass fibers reduced the slump and increased the compressive and splitting tensile strength by up to 23 and 40%, respectively, compared to the plain control mix. Longer glass fibers (43 mm) resulted in further slump loss and increase in the splitting tensile strength, while the compressive strength was unaffected. Extending the handling time led to lower workability and limited impact on the mechanical properties.

Original languageEnglish
Title of host publicationProceedings of the 7th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2022
EditorsHany El Naggar, Joaquim Barros, Paulo Cachim
PublisherAvestia Publishing
ISBN (Print)9781927877999
DOIs
Publication statusPublished - 2022
Externally publishedYes
Event7th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2022 - Virtual, Online
Duration: Apr 10 2022Apr 12 2022

Publication series

NameWorld Congress on Civil, Structural, and Environmental Engineering
ISSN (Electronic)2371-5294

Conference

Conference7th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2022
CityVirtual, Online
Period4/10/224/12/22

Keywords

  • Glass fiber
  • compressive strength
  • fly ash
  • geopolymer concrete
  • slag
  • slump
  • splitting tensile strength

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Environmental Engineering

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