Novel mine filling quick-setting enhanced additive
A mine filling and enhanced technology, applied in the field of new mine filling quick-setting enhanced admixture, can solve the problems of poor rheological properties, long setting time, large shrinkage, etc., achieve good water retention performance, high setting time, and prevent aggregation Effect
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Embodiment 1
[0029] According to the composition and ratio of the raw materials, the slurry concentration rheological agent 20wt%, the alkaline activator 30wt%, the quick-setting agent 25wt%, and the early strength agent 25wt% are mixed evenly to configure a new mine filling quick-setting enhanced admixture.
[0030] First, the new mine filling quick-setting enhanced admixture is mixed with the cementitious material to prepare the mixed material, and then the aforementioned mixed material with different lime-sand ratio (1:5) is mixed with the iron tailing sand evenly to prepare the low-shrinkage and early-strength mine filling Slurry. Among them: the gradation of iron tailings is 10.75% +60 mesh, 19.09% +100 mesh, 42.82% -100+200 mesh, 9.68% -200+300 mesh, 7.13% -300+400 mesh, and -400 mesh at 10.53%.
[0031] The low-shrinkage early-strength mine filling slurry prepared above is pumped into the goaf for filling, wherein:
[0032] In the mixed material, the amount of additives accounts f...
Embodiment 2
[0038] According to the composition and ratio of the raw materials, the slurry concentration rheology agent is 35wt%, the alkaline activator is 25wt%, the quick-setting agent is 20wt%, and the early strength agent is 20wt%, and the new mine filling quick-setting enhanced admixture is prepared.
[0039] First, the new mine filling quick-setting enhanced admixture is mixed with the cementitious material to prepare the mixed material, and then the aforementioned mixed material with different lime-sand ratio (1:5) is mixed with the iron tailing sand evenly to prepare the low-shrinkage and early-strength mine filling Slurry. Among them: the gradation of iron tailings is 23.30% +100 mesh, 22.09% -100+200 mesh, 5.82% -200+300 mesh, 14.54% -300+400 mesh, and 34.25% -400 mesh .
[0040] The low-shrinkage early-strength mine filling slurry prepared above is pumped into the goaf for filling, wherein:
[0041] In the mixed material, the additive content accounts for 0% of the mass perce...
Embodiment 3
[0049] According to the composition and ratio of the raw materials, the slurry concentration rheology agent is 15wt%, the alkaline activator is 32wt%, the setting accelerator is 28wt%, and the early strength agent is 25wt%, and the new mine filling quick-setting enhanced admixture is prepared.
[0050] First, the new mine filling quick-setting enhanced admixture is mixed with the cementitious material to prepare the mixed material, and then the aforementioned mixed material with different lime-sand ratio (1:5) is mixed with the iron tailing sand evenly to prepare the low-shrinkage and early-strength mine filling Slurry. Among them: the gradation of iron tailings is 21.75% +60 mesh, 30.99% +100 mesh, 25.99% -100+200 mesh, 4.42% -200+300 mesh, 4.23% -300+400 mesh, and -400 mesh at 13.1%.
[0051] The low-shrinkage early-strength mine filling slurry prepared above is pumped into the goaf for filling, wherein:
[0052] In the mixed material, the additive content accounts for 0% ...
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