The Correlation between Pore Structure and Macro Durability Performance of Road Concrete under Loading and Freeze-Thaw and Drying-Wetting Cycles

Table 2

The grey correlation degree between pore structure parameters and strength under different loading levels and freeze-thaw and drying-wetting cycles.

Strength	Parameters
	Porosity/%	Total pore surface area/m^2/g	Area median aperture/nm	Average aperture/nm	Most probable pore size/nm	Pore fractal dimension
50% loading
C1	0.866	0.736	0.531	0.596	0.903	0.845
C2	0.889	0.749	0.549	0.538	0.893	0.850
80% loading
C1	0.862	0.765	0.643	0.601	0.973	0.926
C2	0.886	0.728	0.670	0.575	0.909	0.910
Strength	Parameters
	More harmful pore/nm	Harmful pore/nm	Less harmful pore/nm	Harmless pore/nm	Pore spacing coefficient	/
50% loading
C1	0.777	0.627	0.858	0.815	0.716	/
C2	0.749	0.713	0.884	0.807	0.724	/
80% loading
C1	0.856	0.771	0.915	0.823	0.843	/
C2	0.796	0.799	0.891	0.789	0.798	/