AASHTO M 216-13 (2017) PDF Download

The AASHTO M 216-13 (2017) standard addresses the use of quicklime and hydrated lime for stabilizing soils. This specification applies to various types of lime, such as high calcium, dolomitic, or magnesian lime, which are used to improve the load-bearing properties of clay soils for highway construction and other load-bearing applications.

The standard recognizes that lime can cause clay particles to agglomerate and form larger particles, leading to improved load-bearing properties in the treated soil. This process involves a chemical reaction that causes the lime-treated soil to harden. However, it's important to note that the specification does not cover the requirements for by-product lime or commercial lime slurry. These materials are best evaluated and regulated locally based on specific project requirements.