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Table 1 Ratio of the chloride concentration in a circular RC cross-section and the chloride concentration of the plane RC element \( C/C_{slab} \) estimated at depth \( \rho_{1} = 2\;{\text{cm}} \) from the external surface.

From: Chloride Penetration in Circular Concrete Columns

\( C/C_{slab} \)

t = 1 year

t = 5 years

t = 10 years

t = 20 years

t = 50 years

R = 20 cm

1,054

1,055

1,056

1,057

1,060

R = 30 cm

1,035

1,036

1,036

1,036

1,037

R = 50 cm

1,021

1,021

1,021

1,021

1,021

R = 100 cm

1,010

1,010

1,010

1,010

1,010

R = 150 cm

1,007

1,007

1,007

1,007

1,007