Comparative Study of Strength and Corrosion Resistant Properties of Plain and Blended Cement Concrete Types

Table 4

Impressed voltage parameters for rebar in OPC, PPC, and PSC M30 and M40 grade concrete types.

Grade and type of cement	Maximum anodic current; (mA)	(%); reduction	Time to cracking; (days)	Free chloride contents; (ppm)	Weight loss; (mg)	Reduction in corrosion rate (%)
28-day cured concrete specimens
OPC M30	77	—	07	4680	44.3210	—
PPC M30	65	15.6	08	3560	25.3120	42.9
PSC M30	43	44.2	10	3253	7.9140	82.1
OPC M40	72	—	10	3789	35.3020	—
PPC M40	56	22.2	12	3420	14.1410	59.7
PSC M40	39	45.8	14	3200	2.4650	93.0
90-day cured concrete specimens
OPC M30	74	—	08	4200	33.5780	—
PPC M30	58	21.62	09	3165	12.2290	63.6
PSC M30	43	41.89	11	2880	1.7030	94.9
OPC M40	60	—	14	3040	23.4530	—
PPC M40	43	28.30	18	2840	11.9420	49.0
PSC M40	26	56.66	20	2640	1.1470	95.1