FURTHER TRIALS OF EARLY TRAFFICKING OF BONDED CEMENT MORTARS AND CONCRETE TOPPINGS TO CONCRETE PAVEMENTS

REPAIRS TO CONCRETE PAVEMENTS WHICH INCORPORATE THIN- BONDED CEMENT MORTAR TOPPINGS HAVE USUALLY BEEN CLOSED TO TRAFFIC FOR PERIODS OF THREE DAYS OR MORE. TESTS HAVE BEEN CARRIED OUT TO ASSESS IF THIS PERIOD CAN BE REDUCED TO LESS THAN 24 HOURS USING ULTRA-HIGH EARLY- STRENGTH PORTLAND CEMENT. AS A RESULT OF THESE TRIALS, IT IS CONCLUDED THAT IT IS SAFE TO SUBJECT REPAIRED AREAS TO HEAVY TRAFFIC WHEN SITE-CURED CUBES INDICATE THAT THE MORTAR HAS ACHIEVED A STRENGTH OF 10 N/SQ MM. THIS STRENGTH CAN BE ACHIEVED IN PERIODS MUCH LESS THAN 24 HOURS, THE ACTUAL TIME BEING DEPENDENT ON CURING TEMPERATURES. THE MAKING AND TESTING OF CUBES UNDER SITE CONDITIONS IS NOT CONSIDERED AN IDEAL TECHNIQUE FOR DECIDING WHEN REPAIRS MAY BE SUBJECTED TO TRAFFIC AND IT IS SUGGESTED THAT FUTURE TESTS SHOULD BE CONDUCTED INTO AN ALTERNATIVE METHOD, SUCH AS THE SCHMIDT HAMMER, FOR DECIDING WHEN REPAIRS MAY BE OPENED TO TRAFFIC. THE REPORT ALSO GIVES DATA ON THE VERY EARLY TRAFFICKING OF REPAIRS MADE WITH PRECAST CONCRETE SLABS BEDDED ON CEMENT AND RESIN MORTARS. /AUTHOR/

  • Corporate Authors:

    Cement and Concrete Association

    52 Grosvenor Gardens
    London SW1W 0AQ,   England 
  • Authors:
    • Lilley, A A
  • Publication Date: 1973-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 5 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00206071
  • Record Type: Publication
  • Report/Paper Numbers: No 42.482
  • Files: TRIS
  • Created Date: Aug 20 1973 12:00AM