BS 63: PART 2: 1971 SPECIFICATIONS FOR SINGLE-SIZED ROADSTONE AND CHIPPINGS. PART 2. METRIC UNITS

THIS IS A REVISED VERSION OF THE EARLIER IMPERIAL-UNIT STANDARD. IT LAYS DOWN THE GRADING AND PARTICLE SHAPE REQUIREMENTS FOR SINGLE-SIZED ROADSTONE AND CHIPPINGS FOR USE IN THE CONSTRUCTION AND MAINTENANCE OF ROADS. EIGHT SIZES ARE SPECIFIED, NAMELY NOMINAL 50MM, 40MM, 28MM, 20MM, 14MM, 10MM, 6MM AND 3MM MATERIALS. A TABLE GIVES THE TEST SIEVE SIZES THAT DEFINE THE SPECIFIED SIZE, OVERSIZE, UNDERSIZE AND DUST FRACTIONS FOR EACH SIZE OF MATERIAL AND ALSO THE APPROPRIATE MINIMUM AMD MAXIMUM PERCENTAGES REQUIRED FOR EACH FRACTION. IT ALSO GIVES THE MAXIMUM PERMITTED FLAKINESS INDEX FOR SIZES BETWEEN 50MM AND 10MM INCLUSIVE. IT DIFFERS FROM THE EARLIER IMPERIAL STANDARD IN THAT A MAXIMUM LIMIT FOR DUST IS SPECIFIED. A SAMPLING PROCEDURE IS LAID DOWN AND A SECOND TABLE GIVES A DETAILED EXAMPLE OF THE WAY IN WHICH THE STANDARD SHOULD BE INTERPRETED. THIS RECORD SUPPLEMENTS IRRD ABSTRACT 203613. /TRRL/

  • Corporate Authors:

    Britich Standards Institution

    2 Park Street
    London W1A 23S,   England 
  • Publication Date: 1971

Media Info

  • Features: Tables;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00083122
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: BS 63: Part 2: 1971 Standard
  • Files: ITRD, TRIS
  • Created Date: May 1 1975 12:00AM