EVALUATION OF BITUMINOUS COMPACTION PROCEDURES USING NUCLEAR GAGES

THE COMPACTION PROCEDURES USED IN BITUMINOUS CONSTRUCTION ARE EVALUATED USING NUCLEAR GAGES. NUCLEAR DENSITY TESTS WERE TAKEN BOTH DURING ROLLER OPERATIONS AND AFTER COMPACTION HAD BEEN COMPLETED. THE DENSITY DATA WERE ANALYZED TO STUDY THE FEASIBILITY OF USING NUCLEAR GAGES TO ESTABLISH OPTIMUM ROLLING PATTERNS FOR SEVERAL DIFFERENT TYPES OF BITUMINOUS PAVEMENT MATERIALS FOR THE ROLLERS ENCOUNTERED. AFTER FINAL COMPACTION, CONTINUED NUCLEAR TESTS WERE TAKEN IN A STUDY OF ANY DENSITY VARIATIONS IN THE COMPACTED PAVEMENT. DENSITY TESTS WERE TAKEN TRANSVERSELY, ON JOINTS, ALONG THE PAVEMENT EDGES, ALONG THE LONGITUDINAL WHEELPATH AREAS, AND IN RANDOM LOCATIONS ALONG THE PAVEMENT. THE PREVIOUS VIEW, THAT AREAS OF LOW DENSITY ARE PREDOMINANTLY THE JOINTS AND PAVEMENT EDGES, WAS CONFIRMED. A SEPARATE STUDY WAS CONDUCTED WITH TWO COMMERCIALLY AVAILABLE NUCLEAR DENSITY GAGES TO EVALUATE THE EFFECTIVE DEPTH OF MEASUREMENT. BOTH BACKSCATTER AND AIR-GAP TECHNIQUES WERE ANALYZED. THE AIR-GAP DENSITY TEST WAS SHOWN TO BE DEPENDENT ON ONLY THE TOP 1 3/4 IN. OF MATERIAL TESTED USING THE TEST METHOD DESCRIBED. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1971/361/361-005.pdf
• Supplemental Notes:
  • Sponsored by Committee on Nuclear Principles and Applications and presented at the 50th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Grey, Richard L
• Conference:
  • 50th Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1971-1-18 to 1971-1-22
• Publication Date: 1971

Media Info

• Media Type: Digital/other
• Features: References; Tables;
• Pagination: pp 40-46
• Monograph Title: Asphaltic concrete pavements and constituent materials
• Serial:
  • Highway Research Record
  • Issue Number: 361
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Bituminous construction; Compaction; Density; Measurement; Measuring instruments; Nondestructive tests; Nuclear tests
• Old TRIS Terms: Density measurement; Nuclear testing
• Subject Areas: Construction; Highways; Materials;

Filing Info

• Accession Number: 00215466
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 17 1972 12:00AM