Thin HMA overlays, 1 1/2" or less, are cost effective solution for pavement preservation primarily because of their ability to:
Provide improved ride quality Reduce noise levels
Reduce Surface distresses Reduce life cycle costs
Maintain surface geometrics Provide long-lasting service
Thin HMA Overlays should be placed before the pavement deterioration has reached a critical stage, where a more extensive rehabilitation may be required.
Thin HMA Overlays can be expected to provide 10 years or more on existing asphalt surfaces.
The brochure and presentation below are provided to assist you in using HMA Thin Asphalt Overlays. For further information contact Dudley Bonte, APAI Technical Director, firstname.lastname@example.org.
IS-135 Thin Asphalt Overlays for Pavement Preservation
Thin asphalt overlays are popular approaches to pavement preservation because of their ability to provide improved ride quality, reduce pavement distresses, maintain surface geometrics, reduce noise levels, reduce life cycle costs and provide long-lasting service.
This document provides guidance on when to choose thin overlays, how to select materials and design the mixes, construction and quality control, and what type of performance benefits to expect.
Thin Overlays Presentation