AASHTO T 256-01 (2020) PDF Download

AASHTO T 256-01 (2020) is a standard method of test for measuring pavement deflection. It provides guidelines for measuring the vertical movement of a pavement surface caused by a static, steady-state, or impulse load. The standard describes procedures for conducting deflection measurements using various testing devices and emphasizes the importance of obtaining accurate and consistent measurements regardless of the type of device used.

This standard is applicable for measuring deflections on different types of pavements, including flexible asphalt concrete, rigid portland cement concrete, and composite AC/PCC pavements. It covers various pavement structures, such as plain, jointed, jointed reinforced, continuously reinforced, or fractured concrete pavements.