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To investigate the rheological properties of filling slurry with steel slag and unclassified tailings under different proportioning conditions, rheological tests were conducted using the controlled shear rate method, and the effects of mass concentration, cement-sand ratio, and steel slag content on the rheological properties of the slurry were analyzed. The interaction among mass concentration, cement-sand ratio, and steel slag content on the rheological properties of slurry was investigated using the central composite design response surface method.The results show that the mass concentration has the most significant effect on the yield stress and viscosity, and with the increase of mass concentration, the yield stress and viscosity show a power function growth law. The steel slag content reduces the viscosity and yield stress of the slurry, significantly improving its flowability. When the steel slag content is increased from 0 to 25%, the yield stress decreases by 85.43% and the viscosity decreases by 53.83%. For the interaction of various influencing factors, the interaction between mass concentration and steel slag content has the most significant effect on yield stress and viscosity. The increase of steel slag content promotes the influence degree of mass concentration on rheological parameters, that is, as the steel slag content increases, the influence of mass concentration on yield stress and viscosity gradually increases. Parameter optimization shows that when the mass concentration is 60%, the steel slag content is 30 %, and the cement-sand ratio is 1:8, the yield stress and viscosity of the slurry are the smallest, and the flowability is the highest.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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