Evaluation of the tridymite formation as a technique for enhancing geopolymer binders based on glass waste

摘要: Abstract The low solubility of glass powder is one the important elements hindering large volume recycling waste (GW) in structural geopolymer materials. current study aims to investigate an enhancement process GW be reused improved performance binders. method relies on devitrification through heat treatment at below and above transition temperature quartz order develop new phases tridymite formation. devitrified (DGW) was incorporated optimized combinations with metakaolin using algorithmic mixture design approach pre-targeted ratios SiO2/Al2O3, Na2O/SiO2 liquid/solid. Mixtures raw were used as control geopolymers. Mechanical strengths developed binders assessed up 90 days ambient curing. In addition X-ray diffraction (XRD) Fourier-Transform Infrared Spectroscopy (FTIR) characterize formation DGW powder, comprehensive analysis, including scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) FTIR, completed inspect microstructural change based oxide contents. Sustainability analysis also performed assess energy consumption CO2 emission produced results indicated that maximum occurred under 1-h heating a 900 °C. existence higher content caused significant increase compressive geopolymers made 75% compared mixtures GW. creation more silanol (Si–OH) groups generation accelerated greater degree geopolymerization shown outcomes reaction