Rheology is an effective and efficient indicator to characterize the flow properties of fresh concrete. Through rheology measurement, the influence of variations in constituents and mixing proportions on the fluidity of fresh concrete can be effectively evaluated. In the case of self-compacting concrete and 3D printed concrete, the user can predict and optimize the flowability of fluid concrete by controlling yield stress and viscosity. The rheology models have been proven to be an efficient tool to predict the fresh properties of cementitious composites. In most cases, fresh concrete follows Bingham’s model. However, the special concrete combined with nano-materials requires certain modifications in the existing models. This paper presents a critical review of applicable rheological models based on flow curves as well as the viscosity equations of dense suspensions employed to characterize the flowability of cementitious materials in general. In addition to the governing variables included in the model formula, this review paper also highlights the effect of cement hydration, temperature, mixing methods, mixing sequence and time, vibration, pressure and air entrainment on rheology. Their respective effects can be potentially reflected and quantitatively evaluated by determining the values of the governing variables accordingly. The summary and discussions presented in this paper provide relevant information and knowledge on the rheological properties of the cementitious matrix with and without nano-modification and promote further research.

流变学是表征新鲜混凝土流动特性的有效且有效的指标。通过流变学测量，可以有效地评估成分和混合比例的变化对新鲜混凝土流动性的影响。对于自密实混凝土和3D打印混凝土，用户可以通过控制屈服应力和粘度来预测和优化流体混凝土的流动性。流变模型已被证明是预测水泥基复合材料新鲜特性的有效工具。在大多数情况下，新混凝土遵循宾厄姆的模型。但是，将特殊的混凝土与纳米材料结合使用，需要对现有模型进行某些修改。本文对基于流动曲线的稠密悬浮液的粘度方程式进行了批判性的综述，这些粘度方程式通常用来表征水泥质材料的流动性。除了模型公式中包含的控制变量外，本综述还重点介绍了水泥水化，温度，混合方法，混合顺序和时间，振动，压力和空气夹带对流变学的影响。通过相应地确定控制变量的值，可以潜在地反映和定量评估它们各自的作用。本文所进行的总结和讨论提供了有关具有和不具有纳米改性的胶凝基体流变性质的相关信息和知识，并促进了进一步的研究。