“…In order to establish the relationship between concrete strength and pore structure, the grey correlation analysis method has been applied the main factors that affect the system [ 20 , 21 , 22 ]. However, this method has the disadvantages of partial correlation tendency and loss of individual information, which cause significant deviation of the grey correlation degree and affects the analysis results [ 23 , 24 ]. Mokhtar et al [ 25 ], Jin [ 26 ], Chen [ 27 ], Xie et al [ 28 ], used the Grey Relational Entropy (GRE) analysis method to study the influencing factors and laws of concrete strength, which was proved to be a simple and effective method.…”