胶凝组分粒度特性对水泥性能影响的研究评述

Research Progress on the Influences of Particle Size Characteristics of Cementitious Composition on Cement Properties

介绍了具有胶凝活性的粉煤灰、矿渣、纳米材料的颗粒特性对水泥性能影响的研究,包括颗粒级配区间的优化、颗粒尺寸分布模型以及矿物掺合料的作用机理。细度对水泥强度的贡献很大,特别是在水化初期;目前大多研究中的紧密堆积模型采用fuller分布,可改善浆体的结构;高活性胶凝颗粒、水泥颗粒和低活性胶凝颗粒分别取代细、中和粗颗粒区间,可优化区间提高整体性能。最后对目前国内外研究成果的总结分析,展望了胶凝组分粒度特性的未来研究方向。

The effects of particle size distribution on the cement properties of fly ash,slag and nanometer materials with gelation activity are introduced,including the optimization of grain size distribution range,the particle size distribution model and the mechanism of mineral admixtures. Fineness is very important for strength development,particularly in the early stages of hydration. At present,most of the closepacking model is Fuller distribution,which can improve the microstructure of cement pastes. The approach can optimize distribution interval and improve overall performance by arranging a high activity cementitious particle,cement particle,and a low activity particle are arranged in fine,middle and coarse fractions,respectively. Finally,through the summary and analysis of research results at home and abroad,the further study of the particle size characteristics of gel composition is prospected.