Low quality kaolins (LQK) were used as supplementary cementitious materials to investigate their influence on paste rheological performance. Flow properties incorporating 20 wt% calcined clay with/without fine aggregate were determined. Flow properties were significantly affected by metakaolin content rather than material particle size, surface area or porosity. Accurately analyzing paste rheology following the Reiner-Riwlin procedure allows for the construction of a linear yield stress model based on all solids’ Particle size distribution (PSD) and raw LQK kaolinite content. Models of this sort offer insight for mix design addressing the negative rheological influences caused by LQK with mineralogical and microstructural heterogeneity.

低质量高岭土 (LQK) 被用作补充胶凝材料，以研究它们对糊状物流变性能的影响。确定了包含 20 wt% 煅烧粘土和/不包括细骨料的流动特性。流动特性受偏高岭土含量而非材料粒度、表面积或孔隙率的显着影响。遵循 Reiner-Riwlin 程序准确分析糊状物流变学允许基于所有固体的粒度分布 (PSD) 和原始 LQK 高岭石含量构建线性屈服应力模型。此类模型为混合设计提供了见解，以解决由具有矿物学和微观结构异质性的 LQK 引起的负面流变影响。