DECOMPOSED LITHIC SANDSTONE AS A FEASIBLE PAVEMENT MATERIAL

THE SANDSTONE USED FOR PAVEMENT CONSTRUCTION IN THE WINTON REGION COMES FROM A BORROW AREA IN THE IMMEDIATE VICINITY OF THE TOWN. THIS SOFT PLASTIC SANDSTONE DOES NOT MEET THE USUAL SPECIFICATION REQUIREMENTS FOR A PAVING MATERIAL. THE METHODS ADOPTED IN INVESTIGATING THE MATERIAL AND THE DEVELOPMENT OF CONSTRUCTION TECHNIQUES TO PRODUCE A PAVEMENT ARE DESCRIBED. THE EFFECT OF MOISTURE CHANGES IN THE SANDSTONE MUST BE REDUCED TO THE EXTENT THAT CRACKING AND MOISTURE INGRESS ARE ELIMINATED. COMPACTION AND HEAVY PRIMING ALONE WILL NOT PREVENT THE FAILURE MECHANISM WHICH COMMENCES WITH CRACKING. THE ALTERNATIVE (ARMOURING) WHICH REDUCES THE AMOUNT OF SANSTONE IMMEDIATELY IN CONTACT WITH SEAL, AND ANY MOISTURE INGRESS THROUGH SEAL, APPEARS TO OFFER THE BEST SOLUTION SHORT OF COSTLY MECHANICAL OR ADMIXTURE STABILIZATION. IT APPEARS THAT THE REDUCTION OF PLASTIC SANDSTONE BY SUBSTANTIAL REPLACEMENT WITH ARMOURING STONE IMMEDIATELY BENEATH THE SEAL IS SUFFICIENT TO PREVENT THE ONSET OF THE FAILURE MECHANISM. ROLLING IN OF THE ARMOURING STONE MUST TAKE PLACE IMMEDIATELY AFTER COMPACTION OF THE SANDSTONE WHILE THE PAVEMENT IS STILL DAMP IN DEPTH. A 20-MILE SECTION OF ROAD IN THE THIRD YEAR OF SERVICE EVIDENCES NO PAVEMENT FAILURE. FURTHER TEST PAVEMENTS ARE UNDER CONSIDERATION IN AN ATTEMPT TO ELIMINATE THE ARMOURING.

  • Supplemental Notes:
    • Vol 4, Pt 2, PAPER NO 510, PP 1083-1099, 5 FIG, 5 TAB,
  • Corporate Authors:

    ARRB Group Limited

    500 Burwood Highway
    Vermont South, Victoria    3133
  • Authors:
    • Andrews, J H
    • Vlasic, Z
    • Pryor, A J
    • Dickinson, E J
  • Discussers:
    • Grant, K
  • Conference:
  • Publication Date: 0

Media Info

  • Serial:
    • Issue Number: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00232834
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 14 1970 12:00AM