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Table 1 Summary of effect of transverse cracks widths on corrosion of steel in cracked concrete.

From: Effect of Cracking on Corrosion of Steel in Concrete

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