AASHTO T 11-20 PDF Download

The AASHTO T 11-20 standard provides a method for determining the quantity of material finer than a 75-micrometer (No. 200) sieve in aggregate through washing. This test is used to remove clay particles, water-soluble materials, and other aggregate particles that can be dispersed by the wash water. The standard includes two procedures: Procedure A, which uses only water for the washing operation, and Procedure B, which involves the use of a wetting agent to help loosen the finer material from the coarser material. Unless stated otherwise, Procedure A (water only) is to be used. This standard ensures that the finer material in the aggregate is accurately determined, which is important for assessing the quality of the aggregate for various applications in the construction industry.