The physicochemical characteristics of calcined clay influence yield stress of limestone calcined clay cements (LC³), but the independent influences the clay's physical and chemical characteristics as well as the effect of other variables on LC³ rheology are less well-understood. Further, a relationship between LC³ hydration kinetics and yield stress – important for informing mixture design – has not yet been established. Here, rheological properties were determined in pastes with varying water-to-solid ratio (w/s), constituent mass ratios (PC:metakaolin:limestone), limestone particle size and gypsum content. From these data, an ML model developed allowed the independent examination of the different mechanisms by which metakaolin fraction influences yield stress of LC³, identifying four predictors – packing index, Al₂O₃/SO_3, total particle density and metakaolin fraction relative to limestone (MK/LS) – most significant for predicting LC³ yield stress. A methodology based on kernel smoothing also identified hydration kinetics parameters best correlated with yield stress.

煅烧粘土的物理化学特性影响石灰石煅烧粘土胶结物（LC ³）的屈服应力，但对粘土物理和化学特性的独立影响以及其他变量对LC ³流变性的影响尚不清楚。^{此外，LC 3}之间的关系水化动力学和屈服应力——对于告知混合物设计很重要——尚未确定。在这里，流变特性在具有不同水固比 (w/s)、组成质量比 (PC:偏高岭土:石灰石)、石灰石粒度和石膏含量的浆料中进行测定。根据这些数据，开发的 ML 模型允许独立检查偏高岭土部分影响 LC ³屈服应力的不同机制，确定了四个预测因子——堆积指数、Al ₂ O ₃ /SO _3、总颗粒密度和偏高岭土部分相对于石灰石 (MK/LS) – 对预测 LC ^3最重要屈服应力。基于内核平滑的方法还确定了与屈服应力最相关的水合动力学参数。