Permeability tests, such as ASTM C1202 and AS 1012.17, are crucial in assessing the durability of concrete and its ability to resist the ingress of harmful substances like chlorides or sulfates.

ASTM C1202: This test evaluates the electrical conductance of a concrete specimen in a sodium chloride solution- A potential difference is applied across the specimen, and the resulting current flow is measured.

The current flow indicates the rate of chloride ion penetration into the concrete, providing an indirect measure of its permeability to chlorides.

AS 1012.17: In this test, a concrete specimen is submerged in a chloride solution, and the depth of chloride penetration into the concrete is measured over time. The depth of penetration is an indicator of concrete’s permeability to chloride ions.

Both tests aim to evaluate the permeability of concrete to chloride ions, which can cause corrosion of reinforcement steel and ultimately degrade the structure’s integrity. By assessing permeability, engineers can make informed decisions regarding concrete mix design, protective coatings, or other measures to enhance the durability of concrete structures in corrosive environments.

Permeability Tests (ASTM C1202 & AS 1012.17)