State of the practice: Design and construction of asphalt paving materials with crumb-rubber modifier. Final report

Technical Report · Fri May 01 04:00:00 EDT 1992

OSTI ID:7280547

Heitzman, M A

The document is a comprehensive overview of the terminology, processes, products, and applications of crumb rubber modifier (CRM) technology. The technology includes any use of scrap tire rubber in asphalt paving materials. In general, CRM technology can be divided into two categories--the wet process and the dry process. When CRM is incorporated into an asphalt paving material, it will modify the properties of the binder (asphalt rubber) and/or act as a rubber aggregate (rubber modified hot mix asphalt). The five concepts for using CRM discussed in the report are McDonald, PlusRide, generic dry, chunk rubber asphalt concrete, and continuous blending asphalt rubber. There are two principal unresolved engineering issues related to the use of CRM in asphalt paving materials. On the national level, the ability to recycle asphalt paving mixes containing CRM has not been demonstrated. At the State and local levels, these modified asphalt mixes must be field evaluated to establish expected levels of performance. The appendices provide guidelines for material specifications, mix design, and construction specifications. An experimental work plan for monitoring performance and a stack emission testing program are also included.

• Research Organization: Federal Highway Administration, Washington, DC (United States). Office of Engineering
• OSTI ID: 7280547
• Report Number(s): PB-92-203900/XAB; FHWA/SA--92/022
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ASPHALTS
BINDERS
BITUMENS
CONSTRUCTION
ELASTOMERS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
POLYMERS
PRODUCTION
RECYCLING
RUBBERS
SPECIFICATIONS
TAR
TIRES
WASTE PRODUCT UTILIZATION