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- W2247296012 abstract "THIS PAPER DISCUSSES THE ASSESSMENT OF THE EFFECTS OF FREEZING AND THAWING ON THE STIFFNESS OF SUBGRADE SOILS IN AN ENVIRONMENT REPRESENTATIVE OF THE NORTH CENTRAL PORTION OF THE NORTH AMERICAN CONTINENT. SUBGRADE SAMPLES WERE TAKEN IN THE FALL OF 1970 AND IN THE SPRING OF 1972 FROM A ROAD IN THE PROVINCE OF SASKATCHEWAN. THESE SAMPLES WERE USED TO DETERMINE IN SITU SUCTION AND RESILIENT MODULI VALUES REPRESENTATIVE OF THOSE EXISTING IN THE SPRING AND THE FALL, AND A LABORATORY TEST WAS DEVELOPED TO DUPLICATE THESE CONDITIONS. MODULI OF THE UNDISTURBED SAMPLES OBTAINED DURING THE SPRING WERE CONSIDERABLY LOWER THAN THOSE FOR SAMPLES OBTAINED IN THE FALL, WHEREAS MODULI OF THE REMOLDED SAMPLES WERE CONSIDERABLY HIGHER THAN THOSE OF THE UNDISTURBED SAMPLES, PROBABLY REFLECTING THE PRESENCE OF SECONDARY STRUCTURE IN THE UNDISTURBED SAMPLES. AFTER TWO FREEZE-THAW CYCLES ON THE REMOLDED SAMPLES, MODULI WERE OBTAINED SIMILAR TO THE VALUES OBTAINED FOR THE 1972 SPRING SAMPLES. SUCTION VALUES OBTAINED FOR THE UNDISTURBED SAMPLES WERE LOWER THAN FOR REMOLDED SAMPLES. IN SITU SUCTION VALUES APPEAR TO RANGE BETWEEN 5 AND 30 PSI, INDICATING THE NEED FOR PRECISE TECHNIQUES FOR MEASUREMENT. APPLICABILITY OF THE PSYCHROMETER FOR DETERMINATION OF IN SITU SUCTION VALUES WAS INVESTIGATED; THIS DEVICE DOES NOT APPEAR SUFFICIENTLY ACCURATE TO MEASURE SUCTIONS IN THIS LOW RANGE." @default.
- W2247296012 created "2016-06-24" @default.
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- W2247296012 date "1973-01-01" @default.
- W2247296012 modified "2023-09-28" @default.
- W2247296012 title "CHARACTERIZATION OF SUBGRADE SOILS IN COLD REGIONS FOR PAVEMENT DESIGN PURPOSES" @default.
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