AASHTO T-99 pertains to which Proctor Test?

AASHTO T-99 refers specifically to the Standard Proctor Test, which is a method used to determine the optimal moisture content at which a soil will achieve its maximum dry density. This test involves compacting soil in a cylindrical mold using a standardized method, applying a specified amount of compactive effort through 25 blows of a weight dropped from a defined height.

The importance of the Standard Proctor Test lies in its widespread application in engineering and construction, particularly in assessing the suitability of soil for construction projects. By determining the maximum dry density and the optimal moisture content, engineers can make informed decisions regarding soil stabilization, compaction strategies, and material suitability for various applications.

The Modified Proctor Test, while related, involves a higher compaction energy and is defined under AASHTO T-180. Consequently, the other choices such as Light Proctor and Heavy Proctor are not standard terms recognized in the AASHTO testing framework, making them less relevant in this context. Understanding the correct designation of AASHTO T-99 as the Standard Proctor Test is fundamental for practitioners working with soil mechanics and earthwork evaluation.