This manual has been prepared to provide information on the latest (1983) methods of cold-mix recycling using emulsified asphalt or hot asphalt cement. (Cutback asphalts are not included because of environmental and energy restraints.) It details means of evaluating materials used in cold-mix recycling, and techniques for mix design and the thickness design of recycled pavement structures. This manual also includes current procedures for removing old pavements, storing and processing reclaimed materials, and constructing recycled pavements using both in-place and central plant production methods.

This synthesis will be of interest to pavement designers, construction engineers, and others interested in economical methods for reconstructing or rehabilitating bituminous pavements. Information is provided on the processes and procedures used by a number of states to recycle asphalt pavements in place without application of heat. Since 1975 a growing number of state highway agencies have reconstructed or rehabilitated asphalt pavements by recycling the old pavement in place. This report of the Transportation Research Board describes the processes used for cold in-place recycling, including construction procedures, mix designs, mixture properties, performance, and specifications.

This report presents a study initiated in 1984 to develop specification guidelines and mix design recommendations and to obtain performance data on cold-mix recycling projects in Ohio. Future investment planning was the motivation for the Ohio Department of Transportation to consider cold-mix recycling of local roads as a maintenance alternative. Two mainline, low volume roads and one shoulder pavement were selected for this study. Documentation and evaluation of the projects are discussed generally in two parts. The first part includes the site selection criteria, pre-construction evaluation, mix designs, construction specifications and construction monitoring. The second part discusses performance evaluation through field inspection, data collection and laboratory evaluation of material properties.

This guide provides the technical information required to implement the application of cold-mix recycling of asphalt concrete pavements. Included are details on areas on application, benefits/advantages, limitations/ disadvantages, and costs associated with this technology. Information is provided on two demonstration sites at Fort Gillem, Georgia, and Fort Leavenworth, Kansas. Also provided is information concerning funding, procurement, maintenance, and performance monitoring. A fact sheet on recycling, contract specification example, and references are provided in the appendixes. Asphalt pavement recycling, Emulsified asphalt cement, Cold milling, In-place cold-mix asphalt recycling, Cold-mix asphalt recycling, Recycling of asphalt.

Introductory technical guidance for civil engineers and construction managers interested in asphalt concrete pavement recycling. Here is what is discussed: 1. INTRODUCTION 2. SURFACE RECYCLING OF PAVEMENTS 3. RECYCLED COLD-MIX ASPHALT CONCRETE 4. RECYCLED HOT-MIX ASPHALT CONCRETE.