Electrical Resistivity of Concrete for Durability Evaluation: A Review

Table 5

Classification of concrete permeability to surface resistivity values.

RCP test versus surface resistivity
Chloride ion permeability	RCP test charged passed (Coulombs)	Surface Resistivity Test
		cylinder; (kΩ-cm); (measured)	cylinder; (kΩ-cm); (measured)	Semi-infinite slab; (real)	KDOT; cylinder; (kΩ-cm); (measured)
High	>4000	<12	<9.5	<6.7	<7.0
Moderate	2000–4000	12–21	9.5–16.5	6.7–11.7	7.0–13.0
Low	1000–2000	21–37	16.5–29	11.7–20.6	13.0–24.3
Very low	100–1000	37–254	29–199	20.6–141.1	24.3–191
Negligible	<100	>254	>199	>141.1	>191