AASHTO T 253-02 (2020) PDF Download

AASHTO T 253-02 (2020) is a standard method of testing the performance of coated dowel bars. Dowel bars are used in concrete pavements to provide load transfer and to prevent the formation of cracks. This standard focuses on evaluating the effectiveness of the organic coating applied to these dowel bars in protecting them against the destructive effects of various environmental factors.

The purpose of the testing outlined in this standard is to determine the coating's ability to withstand weathering conditions, the corrosive impact of deicing chemicals, and the abrasive forces and loading stresses that dowel bars are subjected to in field joints. The goal is to ensure that the coating provides sufficient corrosion resistance and durability to prolong the service life of the dowel bars and the overall pavement structure.

By subjecting the coated dowel bars to different test methods specified in AASHTO T 253-02 (2020), such as salt spray testing, mechanical abrasion testing, and bond strength testing, the standard provides a comprehensive assessment of the coating's performance. This allows for the evaluation of the coating's ability to maintain adhesion, resist corrosion, and provide long-term protection in real-world conditions.