AASHTO M 146-91 (2021) PDF Download

The AASHTO M 146-91 (2021) standard provides a comprehensive set of definitions for terms used in the construction of subgrades and various types of soil-aggregate and fill materials. The standard aims to establish a common understanding and consistent terminology among engineers, contractors, and other stakeholders involved in transportation infrastructure projects.

This standard is essential for effective communication and coordination in the construction industry as it provides clear and precise explanations of key terms related to the materials used in subgrades, soil-aggregate base and surface courses, and fills. By defining these terms, the standard ensures that everyone involved in a project understands and interprets them in the same way, minimizing confusion and potential mistakes during construction.

Accurate and standardized terminology is crucial to ensure the quality and integrity of transportation infrastructure, as well as to facilitate proper compliance with regulations and specifications. The AASHTO M 146-91 (2021) standard serves as an essential resource for professionals in the field, providing a consistent set of definitions that can be relied upon for the characterization and specification of subgrade, soil-aggregate, and fill materials.