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紧密堆积理论基于材料的微观分析,通过干混合组份的选择及颗粒大小分布提高单位体积水泥中的填充固相。此外还通过在水泥浆中改善物质的表面性质,减少颗粒间的填充水及表面的润滑水,进一步提高单位体积水泥浆中的固相,使之形成高强的水化产物,更加致密的水泥石。文中介绍了线性堆积密度模型,计算出二元系统最大堆积时微细胶凝材料体积分数为0.18-0.27,提出二元填充微细胶凝材料尺寸应为被填充材料尺寸的1/2.5-1/1O,并提出PVF(干混堆积分数)=∑绝对体积/∑散装体积的概念。
Tight packing theory Based on the microscopic analysis of the material, the solid phase filled in the cement per unit volume is increased by the choice of dry mixed components and the particle size distribution. In addition, by improving the surface properties of the material in the cement slurry, reducing the filling water between the particles and the surface of the lubricating water to further improve the solid phase per unit volume of cement slurry to form high-strength hydration products, more dense cement stone . The linear bulk density model was introduced in this paper. The volume fraction of fine binder in the binary system was calculated to be 0.18-0.27. It was proposed that the size of the binary filled fine binder should be 1 / 2.5-1 / 10 , And put forward the concept of PVF (dry mix fraction) = Σ absolute volume / Σ bulk volume.