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Table 3 Chloride ion penetrability based on charge passed (ASTM C1202-10 2010).

From: Durability Properties and Microstructure of Ground Granulated Blast Furnace Slag Cement Concrete

Charge passed (C)

Chloride ion permeability

>4,000

High

2,000–4,000

Moderate

1,000–2,000

Low

100–1,000

Very low

<100

Negligible