AN ARTIFICIAL WEATHERING TEST FOR ROADING AGGREGATES

AGGREGATES FOR NEW ZEALAND ROADS ARE PRODUCED FROM ROCKS OF VARYING SOURCE, GEOLOGIC ORIGIN, AND PHYSICAL CHARACTER. A NUMBER OF WELL-ESTABLISHED TESTS ARE USED FOR ASSESSING THE PHYSICAL PROPERTIES OF THESE AGGREGATES. HOWEVER, BECAUSE OF UNSATISFACTORY CORRELATION BETWEEN THE ESTABLISHED TESTS AND SERVICE PERFORMANCE, ROADING AUTHORITIES HAVE BECOME INTERESTED IN DEVISING TESTS THAT IN SOME DEGREE SIMULATE THE DETERIORATIVE AGENCIES IN THE ROAD ENVIRONMENT. AN ARTIFICIAL WEATHERING TEST, DEVELOPED AT MINISTRY OF WORKS CENTRAL LABORATORY, SHOWS PROMISE IN PREDICTING THE BEHAVIOR OF AN AGGREGATE SUBJECT TO PERIODIC MOISTURE AND TEMPERATURE CHANGES. THE TEST IS DESIGNED TO ASSESS THE INTEGRITY OF THE ROCK IN SUCH AN ENVIRONMENT AND TO INDICATE WHETHER THE BREAKDOWN PRODUCT IS PLASTIC. THE LIMITATIONS OF THE TEST AND THE CORRELATION OF RESULTS WITH REPORTED PERFORMANCE ARE DISCUSSED. /TRRL/

• Supplemental Notes:
  • SESSION L
• Corporate Authors:

  National Roads Board /New Zealand

  /Proc of Roading Symposium 1967
  ,   United States 
• Authors:
  • Clelland, J
• Publication Date: 1970

Language

• English

Media Info

• Features: Figures; Tables;
• Pagination: p. 743-58
• Serial:
  • Volume: ii

Subject/Index Terms

• TRT Terms: Aggregates; Moisture content; Rock fracture; Temperature; Testing; Weathering
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00217742
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Jun 11 1972 12:00AM