A kind of nickel slag manganese slag concrete admixture and preparation method thereof
A composite admixture and concrete technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of unsuitable standardized industrial production, large slump loss of fresh concrete, and inconvenient concrete application and other problems, to achieve the effect of improving work performance, significant economic benefits, and increased strength
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Embodiment 1
[0024] Formula: 30% manganese slag, 10% nickel slag, 10% burnt clay, 40% limestone, 5% black stone, 5% phosphogypsum;
[0025] Preparation method: before entering the mill, control the moisture of the above materials to less than 2%; before entering the mill, the particle size of the material is less than 5mm;
[0026] Mix the materials in the above formula evenly and put them into a ball mill, use a 45 μm square hole sieve to control the sieve residue to 15%, and then obtain a composite admixture for concrete.
[0027] According to the conventional C30 concrete ratio, the quality of the cementitious material in each square concrete is 210 kg of cement + 70 kg of mineral powder + 60 kg of fly ash. The composite admixture can replace 70 kg of mineral powder or 60 kg of kg of cement and 60 kg of fly ash, or instead of 60 kg of cement, the strength can be increased by more than 5MPa on the premise of satisfying the working performance.
Embodiment 2
[0029] Formula: 25% manganese slag, 15% nickel slag, 10% burnt clay, 40% limestone, 5% black stone, 5% phosphogypsum;
[0030] Preparation method: Before entering the mill, control the moisture content of the above materials to less than 2%; before entering the mill, the particle size of the material is less than 5mm; the unsatisfactory broken particles are less than 5mm;
[0031] Mix the materials in the above formula evenly and put them into a ball mill, use a 45 μm square hole sieve to control the sieve residue to 14%, and then obtain a composite admixture for concrete.
[0032] According to the conventional C30 concrete ratio, the quality of the cementitious material in each square concrete is 210 kg of cement + 70 kg of mineral powder + 60 kg of fly ash. The composite admixture can replace 70 kg of mineral powder and 20 kg of cement in equal amounts, or Equivalent replacement of 60 kg of cement and 40 kg of slag powder, on the premise of meeting the working performance, t...
Embodiment 3
[0034] Formula: 25% manganese slag, 5% nickel slag, 10% burnt clay, 50% limestone, 5% black stone, 5% phosphogypsum;
[0035] Preparation method: Before entering the mill, control the moisture content of the above materials to less than 2%; before entering the mill, the particle size of the material is less than 5mm; the unsatisfactory broken particles are less than 5mm;
[0036] Mix the materials in the above formula evenly and put them into a ball mill, use a 45 μm square hole sieve to control the sieve residue to 13%, and then obtain a composite admixture for concrete.
[0037] The admixture in Example 3 above was used in concrete.
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