AASHTO T 355-16 PDF Download

The AASHTO T 355-16 standard outlines the procedure for determining the in-place density of asphalt mixtures using a nuclear gauge. This test method utilizes the backscatter/air-gap ratio method to determine the density of the material.

The density of the asphalt mixtures is determined by measuring the attenuation of gamma radiation. The source and detector(s) are placed on the surface of the material to be tested, and the density is determined by comparing the detected rate of gamma radiation with previously established calibration data.

By using nuclear methods, this standard provides a non-destructive and efficient way to assess the density of asphalt mixtures in the field. This information is crucial for quality control and durability of asphalt pavements, as the density of the material directly affects its performance and longevity.