STRENGTH AND DEFORMABILITY OF ROCKS AT LOW TEMPERATURES

STRENGTH TESTS WERE MADE ON THREE TYPES OF ROCK, BOTH "AIR-DRY" AND WATER-SATURATED, AT TEMPERATURES FROM +25 DEG TO -195 DEG C, AND STRESS/STRAIN TESTS WERE MADE DOWN TO -60 DEG C. STRENGTH OF AIR-DRY SPECIMENS INCREASED WITH DECREASING TEMPERATURE AT AN AVERAGE RATE OF APPROXIMATELY .002 PER DEG C, AND QUASI-ELASTIC MODULI INCREASED AT COMPARABLE RATES. STATIC FATIGUE MECHANISMS IN AIR-DRY ROCK WERE APPARENTLY INFLUENCED BY TEMPERATURE-MODIFICATION OF ADSORBED WATER. STRENGTH OF WATER-SATURATED SPECIMENS INCREASED DRAMATICALLY AS PORE WATER FROZE, AND CONTINUED TO INCREASE DOWN TO -120 DEG C, WHERE COMPRESSIVE AND TENSILE STRENGTHS WERE GREATER THAN ROOM TEMPERATURE VALUES BY FACTORS OF 5, 4 AND 2 FOR SANDSTONE, LIMESTONE AND GRANITE RESPECTIVELY. COMPRESSIVE STRESS/STRAIN CURVES FOR SATURATED ROCKS BECAME STEEPER AFTER FREEZING, AND INITIAL TANGENT MODULI FOR SATURATED HIGH POROSITY ROCKS INCREASED BY WELL OVER AN ORDER OF MAGNITUDE. /AUTHOR/

  • Supplemental Notes:
    • Rr 294, 75 PP, 33 FIG, 22 TAB, REFS, APP
  • Authors:
    • Mellor, M
  • Publication Date: 1971-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00236066
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 29 1971 12:00AM