Effect of ground granulated blast furnace slag particle size distribution on paste rheology: A preliminary model
Effect of ground granulated blast furnace slag particle size distribution on paste rheology: A preliminary model
复制标题
磨碎的粒化高炉矿渣粒度分布对膏体流变性的影响：初步模型
DOI：
10.1063/1.4812126
复制
发表时间：
2013
影响因子：
13.5
通讯作者：
J. Deventer
中科院分区：
文献类型：
--
作者：
A. Kashani;J. Provis;J. Deventer
磨细的高炉矿渣与硅酸盐水泥广泛结合，作为一种辅助材料，也被用于碱激发粘结剂(地聚合物)和过硫酸盐水泥中，这是显著减少二氧化碳排放的硅酸盐水泥的潜在替代品。胶凝材料的流变性对工作性的影响是很重要的，特别是在自流平混凝土中。研究了矿渣颗粒的不同粒度分布对浆体流变性的影响。流变学测量结果表明，模粒大小与糊料的屈服应力有直接关系。介绍了一种基于颗粒尺寸分布计算各浆体屈服应力值的经验模型，并将其应用于一系列单一水固比下的体系。该模型与实验数据吻合较好。
Ground granulated blast furnace slag is widely combined with Portland cement as a supplementary material, and is also used in alkali-activated binders (geopolymers) and in supersulfated cements, which are potential replacements for Portland cement with significantly reduced carbon dioxide emissions. The rheology of a cementitious material is important in terms of its influence on workability, especially in self leveling concretes. The current research investigates the effects of different particle size distributions of slag particles on paste rheology. Rheological measurements results show a direct relationship between the modal particle size and the yield stress of the paste. An empirical model is introduced to calculate the yield stress value of each paste based on the particle size distribution, and applied to a range of systems at single water to solids ratio. The model gives a very good match with the experimental data.