Electrical Resistivity of Concrete for Durability Evaluation: A Review

Table 6

Concrete resistivity and risk of corrosion of steel reinforcement.

Corrosion risk	Resistivity values (kΩ·cm)
	Polder [7]	Song and Saraswathy [66], Elkey and Sellevold [67]	Commercial Wenner probe instrument manuals [68, 69]
High	<10	<5	≤10
Moderate	10–50	5–10	10–50
Low	50–100	10–20	50–100
Negligible	>100	>20	≥100