Table 7.

Parameters for optimizing the composition of the complex nano-modifier and their boundary values.

Optimization Parameter	Physical Meaning of Optimization Parameters
$$R_{b,cub}$$	Ultimate compressive strength of concrete samples at 28 days
$$R_b$$	Ultimate strength in axial compression of concrete samples at 28 days
$$R_{btb}$$	Ultimate tensile strength in the bending of concrete specimens aged 28 days
$$R_{bt}$$	Axial tensile strength of concrete samples at 28 days