AASHTO T 374M/T 374-17 PDF Download

The AASHTO T 374M/T 374-17 standard outlines a procedure for determining and comparing the corrosion resistance of uncoated chromium-alloyed steel bars used for concrete reinforcement. This test is specifically designed to evaluate the corrosion resistance of these bars in comparison to carbon steel bars or other reference bars, if specified by the purchaser.

The test is commonly referred to as the "tombstone test" and is performed to determine the relative performance of different types of steel reinforcement. It involves subjecting the steel bars to a corrosive environment, such as a chloride solution, for a specific period of time. The corrosion products that form on the bars are examined and compared using visual inspection and microscopy techniques.

By conducting this test, engineers and researchers can assess the corrosion resistance of uncoated chromium-alloyed steel bars, which are commonly used in concrete reinforcement, and compare them to other types of reinforcement materials. This information can aid in the selection of appropriate materials for reinforced concrete structures, ensuring their long-term durability and performance.