1 Introduction
2 Effect of Crack Widths
References | Type of concrete | Water/cement | Study period | Corrosion rate (μA/cm2), or corrosion current (μm/year), or corrosion potential (mV), or mass loss (%) | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Uncracked | Crack width = 0.1 mm | Crack width = 0.2 mm | Crack width = 0.3 mm | Crack width = 0.4 mm | Crack width = 0.5 mm | Crack width = 0.7 mm | ||||
Otieno et al. (2010) | OPC concrete | 0.4 | 28 Weeks | 0.04 μA/cm2 | 0.14 μA/cm2 | 0.36 μA/cm2 | 0.69 μA/cm2 | |||
OPC concrete | 0.55 | 28 Weeks | 0.10 μA/cm2 | 0.31 μA/cm2 | 0.78 μA/cm2 | 0.93 μA/cm2 | ||||
50% Slag | 0.4 | 28 Weeks | 0.04 μA/cm2 | 0.07 μA/cm2 | 0.26 μA/cm2 | 0.38 μA/cm2 | ||||
50% Slag | 0.55 | 28 Weeks | 0.05 μA/cm2 | 0.07 μA/cm2 | 0.41 μA/cm2 | 0.55 μA/cm2 | ||||
Mohammed et al. (2001a) | OPC | 0.30 | 14 Weeks | 0.1 μA/cm2 | ||||||
0.50 | 14 Weeks | 0.00 μA/cm2 | 1 μA/cm2 | 1.4 μA/cm2 | 2 μA/cm2 | |||||
0.70 | 14 Weeks | 0.15 μA/cm2 | ||||||||
Sistonen et al. (2007) | OPC | 0.46 | 4 Years | 0.24 μA/cm2 | 0.27 μA/cm2 | 0.52 μA/cm2 | 0.59 μA/cm2 | 0.44 μA/cm2 | 0.54 μA/cm2 | 0.41 μA/cm2 |
Quero et al. (2010) | OPC | 0.3 | 4 Years | − 400 mV | − 600 mV | − 440 mV | − 500 mV | − 400 mV | ||
0.4 | − 500 mV | − 600 mV | − 500 mV | − 480 mV | − 400 mV | |||||
0.5 | − 600 mV | − 600 mV | − 540 mV | − 540 mV | − 400 mV | |||||
0.6 | − 500 mV | − 700 mV | − 540 mV | − 540 mV | − 450 mV | |||||
Sahmaran and Yaman (2008) | OPC mortar | 0.48 | 100 hours | 1.3% Mass loss | 1.5% Mass loss | 1.6% Mass loss | 2.3% Mass loss | |||
Montes et al. (2004) | OPC concrete | 0.37 | 1 Year | 0.15 μA/cm2 | 1.0 μA/cm2 | 2 μA/cm2 | ||||
0.45 | 1 Year | 1.2 μA/cm2 | 1.7 μA/cm2 | 3.3 μA/cm2 | ||||||
20% Fly ash | 0.37 | 1 Year | 0.45 μA/cm2 | 1.1 μA/cm2 | 1.6 μA/cm2 | |||||
0.45 | 1 Year | 0.75 μA/cm2 | 1.7 μA/cm2 | 2.9 μA/cm2 | ||||||
40% Fly ash | 0.37 | 1 Year | 0.15 μA/cm2 | 0.65 μA/cm2 | 1.0 μA/cm2 | |||||
0.45 | 1 Year | 0.25 μA/cm2 | 1.4 μA/cm2 | 2.4 μA/cm2 | ||||||
Scott and Alexander (2007) | OPC | 90 Weeks | Cover = 20 mm | 2.65 μA/cm2 | 3.23 μA/cm2 | |||||
Cover = 40 mm | 1.20 μA/cm2 | 1.48 μA/cm2 | ||||||||
30% Fly ash | 90 Weeks | Cover = 20 mm | 0.64 μA/cm2 | 0.50 μA/cm2 | ||||||
Cover = 40 mm | 0.39 μA/cm2 | 0.71 μA/cm2 | ||||||||
50% Slag | 90 Weeks | Cover = 20 mm | 0.39 μA/cm2 | 0.53 μA/cm2 | ||||||
Cover = 40 mm | 0.35 μA/cm2 | 0.51 μA/cm2 | ||||||||
7% Silica fume | 90 Weeks | Cover = 20 mm | 0.67 μA/cm2 | 1.03 μA/cm2 | ||||||
Cover = 40 mm | 0.59 μA/cm2 | 1.12 μA/cm2 | ||||||||
Otsuki et al. (2000) | OPC concrete | 0.30 | 4 Weeks | 0.95 μm/year | ||||||
0.50 | 4 Weeks | 1.45 μm/year | ||||||||
0.70 | 4 Weeks | 3.39 μm/year | ||||||||
Berke et al. (1993) | OPC concrete | 1 Year | Corrosion area = 1600 mm2 | |||||||
Schiebl and Raupach (1997) | OPC concrete | 0.6 | 24 Weeks | 5 mg (loss) | 15 mg (loss) | 35 mg (loss) | 100 mg (loss) | |||
0.6 | 2 Years | 90 mg (loss) | 20 mg (loss) | 70 mg (loss) | 70 mg (loss) | |||||
0.5 | 24 Weeks | 4 mg (loss) | 10 mg (loss) | 14 mg (loss) | 12 mg (loss) | |||||
0.5 | 2 Years | 9 mg (loss) | 50 mg (loss) | 110 mg (loss) | 100 mg (loss) | |||||
Raupach (1996) | OPC concrete cover 35 mm | 0.5 | 24 Weeks | 1.3 mg (loss) | 2.4 mg (loss) | 3.7 mg (loss) | 2.1 mg (loss) | |||
0.6 | 3.5 mg (loss) | 13.7 mg (loss) | 26.4 mg (loss) | 65.7 mg (loss) | ||||||
0.5 | 2 Years | 4.9 mg (loss) | 38.8 mg (loss) | 107.1 mg (loss) | 83.5 mg (loss) | |||||
0.6 | 11.3 mg (loss) | 30.7 mg (loss) | 104.8 mg (loss) | 110.7 mg (loss) | ||||||
Cover 15 mm | 0.6 | 24 Weeks | 123.6 | 124.7 | 158.4 | 241.3 | ||||
Cover 15 mm | 0.6 | 2 Years | 243.9 | 268.4 | 273.1 | 365.8 |