THE EFFECT OF SULPHATES IN COLLIERY SHALE ON ITS USE FOR ROADMAKING

THE RESULTS OF INVESTIGATIONS CONDUCTED TO FIND THE EFFECT ON CEMENTED PRODUCTS OF SULPHATES IN COLLIERY SHALE ARE PRESENTED. THE RESULTS SHOW THAT BURNT COLLIERY SHALE CAN BE USED AS AN UNBOUND SUB-BASE WITHOUT RISK OF ATTACK TO ADJACENT CONCRETE AND CEMENT-BOUND MATERIALS IF THE SULPHATE CONCENTRATION OF A 1:1 SHALE-WATER EXTRACT DOES NOT EXCEED 2 G SULPHATE PER LITRE. IF THE SHALE IS TO BE STABILIZED WITH CEMENT THE ACID-SOLUBLE SULPHATE CONTENT SHOULD NOT EXCEED 1 PER CENT OF SULPHATE. THESE LIMITS ARE TOO RESTRICTIVE FOR SHALE USED AS BULK-FILL. FOR THIS USE, NO LIMITS ARE GIVEN FOR SULPHATE CONTENT BUT IT IS SUGGESTED THAT, IF THE SULPHATE CONTENT OF THE SHALE EXCEEDS THE LIMIT GIVEN ABOVE FOR UNBOUND SHALE, IT SHOULD NOT BE USED WITHIN 0.5 M (20 INCHES) OF BRIDGE ABUTMENTS OR OF THE ROAD STRUCTURE IF IT CONTAINS CEMENTED LAYERS. /RRL(A)/

  • Supplemental Notes:
    • Rrl Rept Lr 324, 35 PP, 1 FIG, 13 TAB, 8 PHOT, 11 REF
  • Corporate Authors:

    Road Research Laboratory /UK

    ,    
  • Authors:
    • SHERWOOD, P T
    • RYLEY, M D
  • Publication Date: 0

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00232231
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: May 3 1971 12:00AM