Development of a biopolymer modified geopolymer based cementitious material for enhancement of pumpable roof support

Arash Nikvar-Hassani, Lianyang Zhang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper investigates the utilization of biopolymer to improve the ductility of class F fly ash based geopolymer cementitious material developed for pumpable roof support. Specifically, two biopolymers, kappa-carrageenan (CAR) and gellan gum (GEL), at different dosages, were used to prepare the geopolymer cementitious material specimens and systematic tests were performed to measure the peak uniaxial compressive strength (UCS), Young’s modulus, residual UCS, and tensile strength of the hybrid geopolymer-biopolymer cementitious material (HGBCM). The results show that incorporation of biopolymer up to 0.5 wt.% slightly increases or decreases the peak UCS and Young’s modulus, but effectively increases the maximum residual UCS at 0.3 wt.% biopolymer as required. Furthermore, the included biopolymer slightly decreases the tensile strength, with the HGBCM containing CAR showing higher tensile strength than that containing GEL. Compared with the cementitious material currently used in practice, the HGBCM developed in this study shows superior performance.

Original languageEnglish (US)
Article number116
JournalMaterials and Structures/Materiaux et Constructions
Volume55
Issue number4
DOIs
StatePublished - May 2022
Externally publishedYes

Keywords

  • Biopolymer
  • Geopolymer
  • Peak UCS
  • Pumpable roof support
  • Residual UCS

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science
  • Mechanics of Materials

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