AASHTO TP 139-20 PDF Download

AASHTO TP 139-20 is a provisional standard method of testing that focuses on determining the relative density (specific gravity) and absorption properties of lightweight aggregate used in internally cured concrete mixtures. This standard provides a guideline for conducting the test in both field and laboratory settings.

The purpose of this method is to ensure that the lightweight aggregate meets the specified requirements and can effectively contribute to the properties of internally cured concrete. The relative density, also known as specific gravity, is a crucial parameter that determines the quality and performance of lightweight aggregate. Additionally, the absorption of the aggregate is also measured to assess its ability to absorb and retain water within the concrete mixture.

By following the procedures outlined in AASHTO TP 139-20, technicians can accurately determine the relative density and absorption of lightweight aggregate. This information is essential for mix design and proportioning of concrete, as well as for evaluating the overall performance and durability of the concrete in its intended application.