AASHTO M 243-96 (2021) PDF Download

The AASHTO M 243-96 (2021) standard provides guidelines for the application of asphaltic mastic coating on corrugated metal structural plates used in the construction of metal culverts.

This specification aims to ensure the proper adhesion, durability, and performance of the coating to extend the lifespan and protect the underlying metal plates from corrosion and abrasion. The field application of the asphaltic mastic coating helps enhance the structural integrity and longevity of the metal culverts.

The standard covers the process for applying the coating, including surface preparation, coating materials, application methods, and curing requirements. It also addresses testing procedures to confirm the compliance of the installed coating with the specified criteria, such as adhesion, flexibility, hardness, and resistance to moisture and chemicals.

Adhering to this standard assists in maintaining the quality and longevity of corrugated metal structural plate systems used in pipe, pipe-arch, and arch culverts. Compliance with the specification ensures the proper protection of the metal plates, helping to minimize maintenance and repair requirements and prolonging the service life of the culverts.