Resistivity testing, as specified in ASTM C1202, is a method used to assess the electrical resistance of concrete.
The primary purpose of resistivity testing is to evaluate the ability of concrete to resist the ingress of chloride ions. Chloride ions can cause corrosion of steel reinforcement within concrete, leading to structural deterioration. By measuring the electrical resistance of concrete, engineers can infer its permeability to chloride ions, providing insights into its durability and potential for corrosion resistance.
By conducting resistivity testing according to ASTM C1202, engineers can evaluate the chloride ion penetration resistance of concrete and implement measures to enhance its durability and corrosion resistance, thus ensuring the long-term performance of concrete structures.