REPLACEMENT OF CUTBACKS WITH EMULSIFIED ASPHALT
EMULSIFIED ASPHALTS HAVE REPLACED, IN LARGE MEASURE, THE USE OF CUTBACKS IN LARGE MEASURE, THE USE OF CUTBACKS IN MAINTENANCE SURFACE TREATMENTS. MOST CUTBACK CONSTRUCTION CAN BE DONE WITH EMULSIFIED ASPHALTS. THE RECOMMENDED USE OF THIS MATERIAL AS SUBSTITUTE FOR CUTBACK ARE TABULATED. ALL SURFACE TREATMENT AND PENETRATION MACADAM CONSTRUCTION CAN BE DONE WITH RAPID-SET TYPE EMULSIFIED ASPHALTS. TACK COATS CAN BE DONE WITH CRS-1 AND RS-1. SLURRY SEALS CAN BE DONE ONLY WITH EMULSIFIED ASPHALTS. HOWEVER, EMULSIFIED ASPHALTS CANNOT REPLACE ALL CUTBACK APPLICATIONS. THEY CANNOT PRNETRATE DENSE, TIGHT SURFACES AND SO MANY NOT BE USED FOR PRIME COATS WHICH REQUIRE A BINDER THAT PENETRATES SOIL AND UNTREATED AGGREGATE. EMULSIFIED ASPHALTS CAN BE USED TO MAKE STOCKPILE PATCHING MIXES. COLD MIX BASE COURSE AND SURFACE CONSTRUCTION CAN BE DONE WITH EMULSIFED ASPHALT. MIXED-IN-PLACE CONSTRUCTION, WHERE ASPHALT IS SPRAYED ON THE AGGREGATE FOLLOWED BY BLADE MIXING, IS MORE DIFFICULT WITH EMULSIFIED ASPHALTS. COLD MIX EMULSIFIED ASPHALT SURFACE COURSE DESIGN REQUIRES AN AGGREGATE MODIFICATION. THE USE OF OPEN-GRADED EMULSION MIXES ARE OUTLINED. IN THE TREATMENT OF DUST WITH EMULSIFIED ASPHALT, SOME MIXING IS NECESSARY BEFORE APPLICATION. CURRENT AASHO EMULSIFIED ASPHALT GRADES HANDLE MOST WORK, EITHER AS DIRECT SUBSTITUTES OR WITH CHANGES IN CONSTRUCTION PROCEDURES. EMULSIFIED PRIMES, STOCKPILE MATERIALS AND DUST PALLIATIVES HAVE BEEN DEVELOPED AND ARE SPECIFIED BY SOME USER AGENCIES. INFORMATION ON PRODUCT AND CONSTRUCTION TECHNOLOGY MUST BE DISSEMINATED THROUGH FHWA RESEARCH IMPLEMENTATION PROGRAMS, DEMONSTRATIONS AND STATE-OF-THE-ART REPORTS.
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Supplemental Notes:
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Corporate Authors:
500 Fifth Street, NW
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Authors:
- Kari, W J
- Publication Date: 1973-12
Media Info
- Media Type: Digital/other
- Features: Figures; Tables;
- Pagination: p. 21-4
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Serial:
- Highway Research News
- Issue Number: 53
Subject/Index Terms
- TRT Terms: Base course (Pavements); Building materials; Cold mix paving mixtures; Dust control; Liquid asphalt; Macadam; Maintenance; Stockpiling; Surface treating; Tack coats
- Identifier Terms: U.S. Federal Highway Administration
- Uncontrolled Terms: Dust palliatives
- Old TRIS Terms: Cut back; Federal highway administrator; Substitutes
- Subject Areas: Highways; Maintenance and Preservation; Materials;
Filing Info
- Accession Number: 00211876
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jul 16 1974 12:00AM