Multi-strength combination index optimization method based on kaolin toughened epoxy resin cement-based materials
Calcined kaolin can effectively improve the mechanical properties of epoxy resin cement-based materi-als.Experiments show that calcined kaolin can greatly improve the early flexural and compressive strength of epoxy resin cement-based materials,when the kaolin content is 30％,the flexural and compressive strength of modified epoxy resin cement-based materials are increased by 134.28％and 106.25％,respectively.When the kaolin content is less than 30％,the modified epoxy resin cement-based material has secondary flexural strength,and the residual rate of flexural strength is greater than 50％.According to the influence of different kaolin content on compressive strength,flexural strength and secondary flexural strength of modified epoxy res-in cementitious materials,a multi-strength combination index ratio optimization method suitable for different stress characteristics of structural engineering was proposed,and the optimal kaolin ratio under different maxi-mum tensile stress and maximum compressive stress combination conditions considering the influence of sec-ondary tensile strength was obtained,which provided a theoretical basis for the preparation of kaolin modified epoxy resin cementitious materials with different stress characteristics in different parts of different structures.
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维普
