DISCUSSION OF MECHANICAL PORPERTIES OF A SAND-ICE SYSTEM

A PRESENTATION AND ANALYSIS OF AN EXPERIMENTAL STUDY ON CREEP AND STRENGTH ASPECTS OF POLYCRYSTALLINE ICE AND SAND- ICE MIXTURE ARE DISCUSSED. REFERENCE IS MADE TO A GIVEN FIGURE WHERE THE PEAK STRENGTH DETERMINED FROM STRESS-STRAIN TESTS IS PLOTTED AGAINST PERCENTAGE OF SAND BY VOLUME IN SAND-ICE SAMPLES. THE RESULTING BILINEAR RELATIONSHIP DETERMINED BY THE POINT OF INTERSECTION AND REFERRED TO AS THE CRITICAL VOLUME OF SAND CONCENTRATION, POINTS OUT VERY CLEARLY TWO TYPES OF SAND-ICE BEHAVIOR. BELOW THE CRITICAL SAND VOLUME, THE ADDED STRENGTH AND CREEP BEHAVIOR OF THE DISPERSED SAND IN ICE MAY BE SIMILAR TO THE BEHAVIOR OF DISPERSION-STRENGTHENED ALLOYS UNDER APPLIED STRESS. THE INCREASE IN STRENGTH WITH INCREASED VOLUME CONCENTRATION OF SAND IN THE DISPERSED CONFIGURATION APPEARS TO BE A FUNCTION OF INTERPARTICLE SPACING. THE WRITER HAS OBSERVED SIMILAR BEHAVIOR ON CREEP OF A FROZEN CLAY SOIL. THE RESULTS OF IDENTIFICATION AND MINEROLOGICAL TESTS ON THE CLAY SOIL ARE SUMMARIZED IN A TABLE. CREEP SAMPLES WERE SUBJECTED TO A PRESCRIBED STRESS-STRAIN HISTORY IN THE SECONDARY REGION OF CREEP. TWO FIGURES PRESENT RESULTS OF THE EFFECT OF STRESS- STRAIN HISTORY OF CREEP OF FROZEN SAULT ST. MARIE CLAY. THE RELOADING PORTIONS OF THE STRESS-CREEP RATE CURVES SEEM TO PARALLEL THE UNLOADING PARTS EXCEPT FOR SOME SHIFT TO THE LEFT INDICATING SLOWER CREEP RATES. THIS DECREASE IN CREEP RATE WITH INCREASED STRAIN SUGGESTS THAT THE NET EFFECT OF HARDENING AND SOFTENING PROCESSES THAT OPERATE SIMULTANEOUSLY DURING CREEP OF THIS FROZEN CLAY SOIL TEND TO INCREASE SAMPLE RESISTANCE TO DEFORMATION. REFERENCES: MECHANICAL PROPERTIES OF A SAND-ICE SYSTEM, ROY R. GOUGHNOUR, O. B. ANDERSLAND, ASCE PROC. PAPER 6030, JULY, 1968.

  • Supplemental Notes:
    • Vol 95, No SM3, PP 921-923, 22 FIG, 1 TAB, 2 REF, 1 APP
  • Authors:
    • Akili, W
  • Publication Date: 1969-5

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  • Accession Number: 00237784
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 22 1994 12:00AM