AASHTO T 376M/T 376-17 PDF Download

AASHTO T 376M/T 376-17 is a standard method of test that outlines the procedures for measuring the chloride threshold concentration necessary to initiate active corrosion of reinforcing bars in concrete. The test utilizes a macrocell slab type specimen, which is a larger sample size than what is typically used in other corrosion testing methods.

The purpose of this standard is to provide a standardized and reliable method for determining the chloride threshold concentration. This concentration is the point at which the presence of chlorides in the concrete begins to pose a risk of corrosion to the reinforcing bars, leading to potential structural deterioration.

The test procedure involves exposing the macrocell slab specimen to a range of chloride concentrations, and applying a constant current density to accelerate the corrosion process. The corrosion rate is then monitored using various measurements and techniques, such as measuring the corrosion potential and determining the mass loss of the reinforcing bars.

By using this standardized method, engineers and researchers can accurately assess the susceptibility of concrete structures to chloride-induced corrosion. This information is crucial for designing and maintaining durable and long-lasting structures, particularly those exposed to environments with high chloride levels, such as coastal areas or deicing salt application.