CRACKING OF ROCKS BY FROST: APPLICATIONS TO AGGREGATES /IN FRENCH/

THE ACTION OF FROST ON ROCKS IS DEALT WITH BY ANALYZING THE DIFFERENT PARAMETERS INVILVED IN THE PHENOMENON. A STUDY OF THE STRUCTURE OF THE POROUS MEDIUM OF WHICH ROCKS CONSIST REVEALS THAT THEIR DISORDERS DUE TO FROST OCCUR AT TWO LEVELS: MORE OR LESS OPEN CRACKS IN THE ROCK AND THE POROUS MATRIX SITUATED BETWEEN THESE CRACKS. AGGREGATES POSE ONLY THE PROBLEM OF THE CRACKING OF THE MATRIX, THE CRACKS HAVING BEEN ELIMINATED DURING CRUSHING. THE PROCEDURE ADOPTED FOR TESTING AGGREGATES IS BASED ON THE RESULTS AS A WHOLE OBTAINED IN THIS STUDY. ITS CHARACTERISTICS ARE AS FOLLOWS: THE DURATION OF THE TEST IS REDUCED FROM SIX WEEKS TO ONE WEEK; THE CONDITIONS OF FREEZING ARE CLOSER TO THOSE EXISTING IN PAVEMENTS; THE PROCEDURE IS DIRECTLY APPLICABLE TO AGGREGATES; AND THE SENSITIVITY OF THE ROCK UNDER TEST IS MEASURED BY THE EVOLUTION OF THE GRADING CURVE AND THE LOS ANGELES COEFFICIENTS MEASURED BEFORE AND AFTER THE FREEZING CYCLES. /AUTHOR/

• Supplemental Notes:
  • Rapport De RECHERCHE NO 6, 66 PP
• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Tourenq, C
• Publication Date: 1970-3

Subject/Index Terms

• TRT Terms: Aggregates; Cracking; Fracture mechanics; Freezing; Frost action; Highway grades; Materials tests; Matrices (Mathematics); Porous materials; Rock fracture; Sensitivity
• Uncontrolled Terms: Aggregate testing
• Old TRIS Terms: Grading curves
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00217847
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 23 1970 12:00AM