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

Table 5

Bond stresses (MPa) of the investigated phosphate steel rebars.

Concrete type	Rebar type	Bond stresses (MPa)
		28 days of curing		90 days of curing
		at 0.25 mm slip	at failure	at 0.25 mm slip	at failure
NP0	Bare steel	8.21	14.23	8.64	15.09
	ZnP	7.93	13.79	8.61	15.47
	ZnP-Ni	8.45	14.34	8.87	16.08
	ZnP-Cu	8.28	14.41	8.91	15.88
	ZnP-Mn	8.14	14.03	8.78	15.27
NP10	Bare steel	8.05	13.96	8.75	15.51
	ZnP	7.87	13.81	8.79	15.69
	ZnP-Ni	8.44	13.96	9.14	16.58
	ZnP-Cu	8.31	14.31	8.97	15.89
	ZnP-Mn	8.06	13.85	8.95	15.73
NP20	Bare steel	8.23	15.09	8.69	15.54
	ZnP	8.11	15.01	9.1	15.69
	ZnP-Ni	8.56	15.61	8.95	15.98
	ZnP-Cu	8.49	15.74	8.77	16.04
	ZnP-Mn	8.19	14.98	8.85	15.66
NP30	Bare steel	8.51	15.34	9.04	15.83
	ZnP	8.46	15.09	8.81	15.95
	ZnP-Ni	8.97	16.32	9.23	16.69
	ZnP-Cu	8.60	15.96	9.11	16.48
	ZnP-Mn	8.51	15.51	9.03	16.01