MAINTENANCE METHODS FOR PREVENTING AND CORRECTING THE PUMPING ACTION OF THE CONCRETE PAVEMENT SLABS

THE CORRECTION OF PUMPING AT JOINTS IN CONCRETE PAVEMENTS, BY THE USE OF A SEMIFLUID SOIL-CEMENT MIXTURE FORCED UNDER THE SLAB WITH A MUDJACK IS DESCRIBED. THE SLURRY USED CONSISTED OF FOUR SACKS OF CEMENT PER CUBIC YARD OF TOPSOIL AND 50 TO 55% WATER. THE SPACING OF THE HOLES FOR ELIMINATION OF PUMPING AND CORRECTION OF FAULTING IS DISCUSSED. THE EQUIPMENT AND PERSONNEL REQUIRED IS GIVEN IN DETAIL. IN A STUDY OF THE DEFLECTIONS OF THE PAVEMENT UNDER MOVING LOADS, IT WAS NOTED THAT DEFLECTIONS INCREASED IMMEDIATELY AFTER FILLING THE VOIDS UNDER THE PAVEMENT WITH THE SOIL-CEMENT SLURRY AND THEN DECREASED AFTER A PERIOD OF TIME HAD ELAPSED. IT WAS FOUND THAT A FEW OF THE MUDJACKED SLABS RESUMED PUMPING AND THAT THE WORK HAD TO BE SUPPLEMENTED WITH JOINT AND CRACK WATER-PROOFING TO KEEP SURFACE WATER FROM REACHING THE SUBGRADE. ON PAVEMENTS THAT WERE CRACKED EXTENSIVELY, THE BEST METHOD OF WATERPROOFING JOINTS WAS BY THE USE OF A SUBSTANTIAL BITUMINOUS SURFACE OR UPPER DECK NOT LESS THAN 1-IN. IN THICKNESS. AFTER A STUDY OF DESIGN FEATURES FROM THE VIEWPOINT OF A MAINTENANCE ENGINEER, THE AUTHOR CONCLUDES THAT EXPANSION OR CONTRACTION JOINTS SHOULD NOT BE USED IN CONCRETE PAVEMENTS EXCEPT AT HIGHWAY INTERSECTIONS, BRIDGE ENDS OR OTHER LOCATIONS WHERE THE PAVEMENT ABUTTS A FIXED OBJECT. THE RELATION OF THE TYPE OF AGGREGATE TO THE CRACK INTERVAL IN CONCRETE PAVEMENTS IN WHICH NO JOINTS WERE PLACED IS DISCUSSED. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrbresearchrpts/1945/1D-001.pdf
• Supplemental Notes:
  • Res Rept 1d, PP 3-12, 2 FIG, 1 TAB. 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:
  • Whitton, R M
• Publication Date: 1945

Media Info

• Media Type: Digital/other
• Pagination: 10p
• Serial:
  • Highway Research Board Research Reports
  • Issue Number: 1d
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Concrete pavements; Deflection; Joints; Mudjacking; Pavement maintenance; Pavements; Pumping (Pavements); Slurry; Waterproofing
• Old TRIS Terms: Joint; Pavement deflection; Slurries
• Subject Areas: Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 00218893
• Record Type: Publication
• Files: TRIS
• Created Date: May 29 1972 12:00AM