Research Article
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 |
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