Concepts for Developing a Nondestructive Testing Based Asphalt Concrete Overlay Thickness Design Procedure

摘要

Preliminary flexible pavement asphalt concrete (AC) overlay thickness design concepts utilizing NDT (nondestructive testing) data are presented. The Illinois DOT Road Rater (8 kip peak to peak loading, 12 inch diameter plate) was the primary NDT device. Conventional pavements (surface treatment-granular base; AC surface + granular base), full depth asphalt concrete (AC surface + AC base), and stabilized base (with or without AC surface) pavements are considered. Field evaluation, NDT testing, NDT data interpretation, and overlay thickness determination procedures are proposed.