The cementitious activity of iron tailings powder (ITP) as a concrete admixture is investigated and optimized in this study. When the specific surface area (SSA) of ITP is in the range of 450 – 550 m²/kg, the activity is larger than that of fly ash, and when SSA is 469 m²/kg, the activity reaches its largest value of 76.82%. The content of ITP should not exceed 30%. Chemical-mechanical activation increases the activity by only 4.82% which is comparable to a single mechanical activation. ITP role in a concrete admixture is in the physical filling of microaggregates.

中文翻译：

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铁尾矿粉作为混凝土掺合料胶凝活性的优化研究。

本研究对铁尾矿粉（ITP）作为混凝土外加剂的胶凝活性进行了研究和优化。当ITP的比表面积（SSA）在450 – 550 m ² / kg的范围内时，活性大于粉煤灰，而当SSA为469 m ² / kg时，活性达到最大值。 76.82％。ITP的含量不应超过30％。化学-机械活化仅使活性提高4.82％，这与单机械活化相当。ITP在混凝土外加剂中的作用是物理填充微骨料。