Recycling asphalt proves economical for paving contractors
Methods of recyclig asphalt to repair roads are described and evaluated. Need for recycling is caused by the escalating price of asphalt (an oil product). The economics and efficiency of the various processes used are evaluated. Methods described are: (1) cold-mix recycling in which the road is crushed, mixed with a new asphalt emulsion and reapplied; (2) hot mix, which involves ripping up pavement, trucking it to an asphalt plant, and mixing the old pavement material with virgin paving materials; and (3) cold planing (when only the top few inches of the road are deteriorated). Mining of asphalt roads, by removing top layers from old roads which are thick from many repair jobs, is described as well as mining of old airstrips. Value of asphalt available has been estimated as high as $50 billion. Recycling processes for asphalt are described briefly. (MJJ)
- OSTI ID:
- 6308994
- Journal Information:
- Compressed Air; (United States), Journal Name: Compressed Air; (United States) Vol. 87:9; ISSN COAIB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ASPHALTS
BITUMENS
COST
ECONOMIC ANALYSIS
ECONOMICS
EFFICIENCY
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RECYCLING
REPAIR
RESOURCE CONSERVATION
ROADS
TAR
WASTE PRODUCT UTILIZATION