Inhibition Effect of Natural Pozzolan and Zinc Phosphate Baths on Reinforcing Steel Corrosion

Table 4

Water penetration depths, porosity, chloride penetrability, and pH of the investigated concrete.

Curing time	Binder type	Water penetration depth (mm)	Porosity (%)	Chloride penetrability (Coulombs)	pH
28 days	NP0	65	17.2	6278	12.65
	NP10	61	15.7	5891	12.34
	NP20	48	14.2	4367	12.08
	NP30	42	11.1	2915	12.01
90 days	NP0	53	14.4	3971	12.57
	NP10	43	12.2	3214	12.19
	NP20	29	9.7	1965	11.91
	NP30	22	6.8	1112	11.93