Pre-cracking road bases by using a cutting disc and a special hydraulic road binder

A new method for pre-cracking hydraulically bound bases has been developed and tried successfully in Austria: notches are made immediately after compaction by means of a cutting disc mounted to a roller. Since the notches are only 1/3 of the thickness of the base an additional measure is required to ensure that all the joints will open at an early age: a hydraulic road binder is used that develops strength very slowly. With a 7-day-compressive strength of 3 N/mm² on Proctor cylinders the tensile strength during the first days will be only 1/3 of the strength that would result if normal Portland cement were used and the notches will crack during the first nights. Ultimate tensile strength, however, will be at least by 50 % higher than with Portland cement and this will improve the long-term performance of the road.

Language

  • English

Media Info

  • Pagination: 7p
  • Monograph Title: First International Symposium on Subgrade Stabilisation and In Situ Pavement Recycling Using Cement, Salamanca, Spain, 1-4 October 2001

Subject/Index Terms

Filing Info

  • Accession Number: 01392490
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 8489875278
  • Files: ATRI
  • Created Date: Aug 23 2012 7:10AM