Design of Asphalt Concrete Overlay to Mitigate Reflective Cracking

摘要

This report, prepared for the Florida Department of Transportation, outlines aprocedure for the design of asphaltic concrete overlays on existing asphalt concrete and Portland cement concrete pavement surfaces. It is intended to guide the user on the type and form of information required and contains all elements necessary for the user to design overlays with or without SAMIs and reinforcing grids. It also covers in detail theory and logic underlying the procedure. Design equations were developed using Fracture Mechanics criteria for flexible overlays of both flexible and rigid pavements with the Stress Absorbing Membrane Interlayer (SAMI) and Reinforcing Grid. A complete package of computer programs has been assembled to design overlays capable of resisting or retarding reflective cracking.