THE EARLY OPENING OF CONCRETE CARRIAGEWAYS TO TRAFFIC

ZUR FRUEHZEITIGEN VERKEHRSFREIGABE VON BETONFAHRBAHNDECKEN

IN ORDER TO ESTABLISH THE EARLIEST POSSIBLE MOMENT FOR OPENING A ROAD TO TRAFFIC IT IS NECESSARY TO CARRY OUT A SETTING TEST. FOR THIS PURPOSE HERETO SAMPLE BEAMS 20 CM X 20 CM X 60 CM HAVE BEEN MADE IN HEAT INSULATED MOULDS, SPRAYED ON THE UPPER SURFACE WITH A CURING AGENT, STORED IN THE SAME CONDITION AS THE CONCRETE CARRIAGEWAY, STRUCK JUST BEFORE THE TESTING AND TESTED WITH THE UPPER SURFACE UPPERMOST. THE AUSTRIAN SPECIFICATION ALLOWING THE ROAD TO BE OPENED TO TRAFFIC IS CONSIDERED UNDULY SEVERE IN THE PRESENT STATE OF TECHNOLOGY. THE OPENING CAN ALREADY SUCCEED AS SOON AS 70% OF THE 28 DAY BENDING STRESS OF 55 KP/CM2 HAS BEEN REACHED. CONCRETE OF PZ 375 AND WATER CEMENT RATIOS LESS THAN 0.40, WHICH IS MADE EASILY WORKABLE BY THE ADDITION OF AN APPROPRIATE PLASTICISER, WILL USUALLY ATTAIN THE REQUIRED STRENGTH FOR ALLOWING TRAFFIC TO PASS OVER IT JUST ONE DAY AFTER LAYING.

  • Authors:
    • SOMMER, H
  • Publication Date: 1977-2

Language

  • German

Media Info

  • Pagination: 19-24
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01301948
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD
  • Created Date: Nov 21 2010 8:27AM