赤泥作矿渣基胶凝材料调整剂的研究

以赤泥作为调整剂加入到矿渣、石膏、水泥熟料组成的矿渣基胶凝材料中，考察其掺量对胶凝材料抗压强度的影响，并对胶凝材料的微观形貌进行SEM分析。结果表明：随着赤泥掺量的增加，胶凝材料的抗压强度先增大后减小；在赤泥掺量为6%时（矿渣、石膏、熟料用量分别为74%、10%、10%，PC减水剂用量为各原料总量的0.3%）效果最优，胶凝材料的3、7、28 d抗压强度分别达到61.93、70.53、81.02 MPa。胶凝材料的水化产物主要为C-S-H凝胶和钙矾石；随着反应龄期的增长，C-S-H凝胶的覆盖面积不断增大，钙矾石晶体也紧密交织，水化过程趋于完全。

Study On Red Mud As Modifier of Slag Cementing Materials

First,add red mud to the slag cementing materials as modifier which is consist of slag, gypsum and cement clinker, then study the compression strength influence of red mud dosage, and analyze the microstructure of the gelled material by SEM.The test result shows that with the increase of red mud dosage, compression strength first increased, then decreased, and got a optimum at the red mud dosage of 6%（the ratio of the other elements was slag 74%, gypsum 10%, cement clinker 10%, while PC 0.3% of the total amount of the raw materials）, and in this situation, the gelled material can get compression strength of 61.93, 70.53, 81.02 MPa each on 3, 7 and 28 d.Hydration products of the gelled material mainly include C-S-H gel and ettringite; and with the increase of reaction time, the cover areas of C-S-H gel add continually, and ettringite interlace with each other closely, which show hydration processes tend to be completely.