Assessment Of Nuclear Density Measurements In The Quality Control Of Highway Construction

摘要

The quality of highway construction is considered a major concern of highway engineers working in design and supervision, as well as to contractors. Density, moisture content, and compaction are the primary quality control limits. The implementation of quality control programs for asphaltic concrete pavements and base course are motivated by growing belief that cooperative owner-contractor efforts at construction management will lead to higher quality to make sure that the parameters under consideration are achieved in the field to meet the design requirements. Nuclear density measurement depends mainly on the attenuation of gamma radiation due to Compton scattering and photoelectric absorption which directly related to the electron density of the material as an indication of the mass density of specific materials having a chemical composition approximately as that of the crust of the earth.