AASHTO M 57-80 (2021) PDF Download

AASHTO M 57-80 (2021) is a standard specification that outlines the materials to be used specifically for constructing embankments and subgrades. The purpose of this specification is to provide a set of guidelines for selecting materials that will ensure the stability, durability, and performance of the embankment and subgrade structures.

The standard covers a wide range of materials that can be used, including soil, rock, aggregate, and synthetic materials. It provides requirements for the physical and mechanical properties of these materials, such as their grain size distribution, compaction characteristics, shear strength, and permeability. These parameters are important in determining the suitability and behavior of the materials under the loads and environmental conditions that they will be subjected to.

Additionally, the specification also includes criteria for testing and evaluation of the materials, including laboratory testing methods and field sampling procedures. It provides guidance on the measurement and control of the materials during construction to ensure that they meet the specified requirements.