In the process of repairing concrete structures with epoxy coatings, fillers are added for modification so that the coating has sagging resistance and good mechanical properties. This requires comprehensive material design. In this paper, three inorganic fillers (cement, bentonite, and talc) were used to study the effect of fillers on the rheological properties (viscosity, thixotropy) and tensile strength of epoxy coatings through a mixture design method. A multiple linear regression model was established, and the optimal epoxy coating mix was finally obtained. The results showed that the increase of cement content was negatively related to the thixotropy of epoxy coating, but it promoted the tensile strength of the coating. On the contrary, bentonite had a positive effect on the thixotropy of the coating and a negative effect on the tensile strength of the coating. In terms of the shear thinning index, an increase of 1% of the bentonite content can increase the shear thinning index by 1.85 times. Finally, the proportion range of epoxy repair coating that meets the actual engineering needs was obtained through multiple optimization.

在用环氧涂料修补混凝土结构的过程中，加入填料进行改性，使涂料具有抗流挂性和良好的力学性能。这需要全面的材料设计。本文采用三种无机填料（水泥、膨润土和滑石），通过混合物设计方法研究填料对环氧涂料流变性能（粘度、触变性）和拉伸强度的影响。建立多元线性回归模型，最终得到最优的环氧涂料组合。结果表明，水泥掺量的增加与环氧涂层的触变性呈负相关，但促进了涂层的抗拉强度。相反，膨润土对涂层的触变性有积极影响，对涂层的拉伸强度有消极影响。就剪切稀化指数而言，膨润土含量每增加1%，剪切稀化指数可提高1.85倍。最终通过多次优化得到满足实际工程需要的环氧修补涂料的配比范围。