Pavement Preservation Journal, Spring 2015, Vol. 8, No. 1. By NAPA. As public works agencies and departments of transportation look to make the most efficient use of tight budgets, the National Asphalt Pavement Association is outlining the benefits of Thinlay thin asphalt mixes for pavement preservation.

National Pavement Preservation Study (Northern Test Sections) Minnesota DOT Road Research Project (MnROAD) National Center for Asphalt Technology (NCAT) US-169 NB Lane CSAH-8 EB and WB Lanes 5 miles South of Milaca - Just East of Pease - Mille Lacs County l) l))) Northern High Traffic Preservation on US-169 Northern Low Traffic Preservation CSAH-8

Thin asphalt overlay is generally defined as a rehabilitation and preservation tre atment. layer with a thickness less than 38.1 mm (1.5 inch es ). The nominal maximum aggregate size. (NMAS) in

Thin asphalt overlays are a popular solution to pavement preservation. They are economical, long-lasting, and effective in treating a wide variety of surface distresses to restore ride quality, skid resistance, and overall performance.

Thin asphalt overlays are one of the most popular preservation treatments for asphalt and composite pavements. Although commonly used, thin overlays are not constrained to dense-graded mixtures. Gap-graded and open-graded mixtures have also been used by several agencies with good results.

pavement preservation, preventive maintenance, minor rehabilitation (non-structural), and routine maintenance. These terms are described in more detail in the following sections. 1-1.01 Pavement Preservation Pavement preservation is a program employing a network level, long-term strategy that

a roadway. This treatment can be applied to asphalt surfaced pavements. According to the Pavement Preservation and Recycling Alliance (PPRA), the typical life of an untreated road is 20 years (Figure 1.1). The condition of the road is predicted to decrease by 40 percent in the first 75 percent of the pavement's life.

polymer modified asphalt thin overlay RI 114 30 10,900 62.9 High-severity longitudinal, transverse, and block cracking Micro-mill pavement 1 inch deep, localized HMA leveling to restore profile, place 1-inch-thick polymer modified thin overlay ADT average daily traffic ARCS asphalt rubber-modified chip seal HMA hot-mix asphalt

A tack coat is a light application of an asphalt emulsion designed to ensure a strong bond between asphalt pavement layers to prevent slippage or de-lamination of the hot mix overlay from the underlying layer caused by traffic and environmental factors. Tack coat is sprayed on a road surface before a layer of hot mix asphalt is placed. Products:

Thin asphalt overlays placed for pavement preservation are functional overlays to extend the service life of the pavement and are not intended to add structural capacity. The key benefits of a thin asphalt overlay are improved ride, corrected rutting, impermeability and reduced noise. Download this Resource

What is a thin-lift asphalt overlay? Thin-Lift asphalt overlay is an asphalt mixture applied overtop of the existing pavement structure at a thickness of 1.5 - 2 inches. The mixture is similar to regular hot-mix asphalt but may use smaller aggregate pieces to improve compaction. It can be applied using conventional processes and equipment.