PLACING, SPREADING, AND FINISHING STABILIZED ROAD MATERIALS

THE BLADE GRADER IS THE MOST COMMONLY USED EQUIPMENT FOR GRADING AND SPREADING, AND MOST ROAD MIX OPERATIONS CAN BE PERFORMED WITH THIS MACHINE. THE AMOUNT OF MANIPULATION DEPENDS ON THE DESIGN OF THE MIX AND THE EASE WITH WHICH WATER IS INCORPORATED IN IT. SPREADER BOXES, HIGH TYPE ASPHALTIC PAVERS, AND EVEN DUMPING TRUCKS HAVE BEEN UTILIZED. COMPACTION WAS SUPERIOR WITH THE SHEEPSFOOT ROLLER, BUT SINCE THIS IS A TAMPING ROLLER, FLAT WHEELED ROLLERS OR TRUCK ROLLERS ARE REQUIRED FOR FINISHING. IN PLACING MATERIALS FOR MAINTENANCE OPERATIONS PLANT MIXES ARE GAINING IN POPULARITY, A 3 TO 4-INCH LAYER BEING PLACED ON THE OLD ROADWAY. SCARIFICATION OF THE BASE PROVES THE BASE PROVES SATISFACTORY IN CERTAIN INSTANCES. FINISHING METHODS DEPEND TO SOME EXTENT ON THE TYPE OF COMPACTION, AND PROPER MOISTURE CONTENT IS ALSO NECESSARY FOR THE SUCCESS OF THIS OPERATION. AN IMPORTANT FACTOR IN THIS STAGE OF THE CONSTRUCTION IS THE PROVISION OF AN ADEQUATE A-TYPE CROWN WHICH SLOPES UNIFORMLY FROM CENTER TO SIDE, AND WITHOUT WHICH EXCESSIVE POTHOLING IS LIKELY TO DEVELOP. IF THE STABILIZED COURSE IS INTENDED AS A BASE FOR BITUMINOUS SURFACE, THE SEASONING PERIOD DHOULD EXTEND UNTIL A MOSAIC OF AGGREGATE APPEARS AT THE SURFACE; BUT IF THE MATERIAL IS RETAINED AS A SURFACE, OPERATIONS NEED BE LESS EXACTING AND FINISHING CAN BE CONSIDERED AS MAINTENANCE. /AUTHOR/

  • Supplemental Notes:
    • Vol 16, pp 380-384, 5 FIG
  • Authors:
    • Smith, A R
  • Publication Date: 1937

Media Info

  • Monograph Title: Proceedings of the Sixteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. November 18-20, 1936
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00232896
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 1971 12:00AM