作　　者： ; ; ; ; ;

机构地区： 华南理工大学材料科学与工程学院

出　　处： 《硅酸盐学报》 2005年第7期907-911,915,共6页

摘　　要： 为了探索矿渣粉掺合料性能优化的途径,选用RosinRammlerBennett方程作为粒度分布模型,对立磨制备的矿渣粉,用分级组合的手段,配制出22种具有不同特征粒径De=(8～20)μm和不同均匀性系数n=0.9～1.4的矿渣粉体。在掺与未掺高效减水剂两种情况下,进行了矿渣活性指数(胶砂强度)和胶砂流动度的测定,并分别绘制了以矿渣粉的De和n为平面的胶砂流动度和强度等高线图。研究发现不掺减水剂时,矿渣粉的团聚对胶砂流动度和硬化体强度有很大的负面影响。掺加高效减水剂后,胶砂强度主要取决于2个因素:一是矿渣粉的比表面积;二是矿渣粉与硅酸盐水泥在粒度特征值n和De的差异大小。 In order to explore the approach for optimizing the applied properties of ground granulated blast furnace slag (GGBFS), twenty two types of GGBFS samples with different characteristic diameters De(8-20 μm) and homogeneous coefficients n (0.9-1.4) were prepared by mixing GGBFS with different fineness gradations which were ground in a vertical mill, using Rosin-Rammler-Bennett (RRB) equation as the particle size distribution model. Then the fluidity of cement and strength activity index of GGBFS mortars were measured with or without the addition of high efficiency water-reducers (HEWR). Taking the RRB characteristic indices (n and De) of GGBFS as coordinates, the fluidity and strength planar contour maps of mortars were drawn. The results show that the agglomeration of slag particles has a large negative influence on the fluidity and strength of mortars without HEWR added. After addition of HEWR the compressive strength of mortars mainly depends on the Blaine specific surface area of the GGBFS, and the differences between the GGBFS and the Portland cement in their characteristic indices, n and De.

关 键 词： 高炉矿渣粉 粒度分布 活性指数 混凝土掺合料

领　　域： [建筑科学]