Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles

Table 3

Surface chloride content (C_s), chloride diffusion coefficient (D), and correlation coefficient (R²).

		0.30	0.35	0.40	0.45	0.50
Free chloride	Cs,f (%)	1.142	1.738	1.772	1.791	1.936
	Deff (mm^2/a)	150.9	343.9	423.5	432.0	685.8
	R^2	0.9897	0.9979	0.9975	0.9959	0.9961
Total chloride	Cs,t (%)	1.082	1.863	1.944	1.836	1.990
	Dapp (mm^2/a)	222.6	554.1	857.3	921.4	1365
	R^2	0.9911	0.9935	0.9935	0.9949	0.99087

D_eff means the effective diffusion coefficient; D_app means the apparent diffusion coefficient.