关键词: 氟石膏, 金尾矿, 粉煤灰, 混凝土性能, 固废资源化

Abstract: Targeting the dual challenges of high carbon emissions and significant natural resource consumption in the concrete industry，alongside the environmental pollution caused by the stockpiling of industrial solid wastes such as fluorogypsum and gold tailings in Fujian Province，multi-source solid waste composite concrete materials were investigated.An orthogonal experimental method was employed，utiliz⁃ ing fluorogypsum，gold tailings，and fly ash as composite admixtures.The study examined the effects of fly ash replacement rate，gold tailings replacement rate，and fluorogypsum content on the mechanical proper⁃ ties and durability of concrete.By testing compressive and flexural strength at seventh，fourteenth，and twenty-eighth day，combined with impermeability，freeze-thaw resistance，and sulfate corrosion resis⁃ tance tests，the comprehensive performance of the materials was evaluated.The results indicate that the concrete sample with a fly ash replacement rate of 23%，gold tailings replacement rate of 20%，and flu⁃ orogypsum content of 5%achieved a 28th day compressive strength of 34.5 MPa，a flexural strength of 3.6 MPa，an impermeability grade of P8，a freeze-thaw resistance meeting the F50 requirement，and ex⁃ cellent sulfate corrosion resistance.The synergistic use of fluorogypsum，gold tailings，and fly ash as multi-source solid wastes effectively enhances the comprehensive performance of concrete，providing a via⁃ ble technical pathway for the resource utilization of industrial solid waste and the low-carbon，green devel⁃ opment of the concrete industry.

Key words: fluorogypsum, gold tailings, fly ash, concrete performance, solid waste resource utiliza? tion