RECYCLED ASPHALT
The existing asphaltic concrete (A.C.) surfacing and underlying clay material was pulverized, mixed with quick lime, and compacted to a depth of 0.83 feet in a project to improve the structural section and widen a section of State Highway 45. The operational sequence involved working in 3100 lineal feet sections, 12 feet wide. This required 3 loads of lime or 75 tons for each section. The 3 day work sequence (listed) consisted of : ripping the asphalt and breaking it down to approximately 4-inch diameter size; pulverizing the old A.C. so that 90 percent would pass the 1-1/2 inch screen; spread the lime; final mixing of the material, compacted, trimmed and final rolled. Thus a stable base material was produced. The surfacing received on application of CRS asphaltic emulsion applied at a rate of 0.2 gallon per square yard. A light sand coating was applied, as well as an asphalt concrete blanket. Performance was judged to be good. Comments are made on the use of lime, even quicklime in wintertime.
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Corporate Authors:
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 - Publication Date: 1976-4
Media Info
- Pagination: p. 50-52
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Serial:
- Highway Focus
- Volume: 8
- Issue Number: 2
Subject/Index Terms
- TRT Terms: Asphalt concrete; Asphalt pavements; Calcium oxide; Pavement performance; Pavement widening; Recycling
- Old TRIS Terms: Quicklimes
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00149793
- Record Type: Publication
- Files: TRIS, USDOT
- Created Date: Apr 13 1977 12:00AM