TY - JOUR
T1 - Development of a biopolymer modified geopolymer based cementitious material for enhancement of pumpable roof support
AU - Nikvar-Hassani, Arash
AU - Zhang, Lianyang
N1 - Funding Information:
This study was sponsored by the Alpha Foundation for the Improvement of Mine Safety and Health, Inc. (ALPHA FOUNDATION). The views, opinions and recommendations expressed herein are solely those of the authors and do not imply any endorsement by the ALPHA FOUNDATION, its directors and staff. The first author would like to thank Esther Taheri for constructive discussion on the statistical analysis.
Publisher Copyright:
© 2022, RILEM.
PY - 2022/5
Y1 - 2022/5
N2 - 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.
AB - 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.
KW - Biopolymer
KW - Geopolymer
KW - Peak UCS
KW - Pumpable roof support
KW - Residual UCS
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U2 - 10.1617/s11527-022-01953-5
DO - 10.1617/s11527-022-01953-5
M3 - Article
AN - SCOPUS:85128489837
SN - 1359-5997
VL - 55
JO - Materials and Structures/Materiaux et Constructions
JF - Materials and Structures/Materiaux et Constructions
IS - 4
M1 - 116
ER -