MOISTURE RESPONSE IN SOILS (PHASE I-LITERATURE AND LABORATORY STUDY)

A DEVICE WAS DEVELOPED THAT IS SIMPLE IN NATURE AND IN OPERATION, TO MEASURE THE NON-EQUILIBRIUM RESPONSE OF SOIL TO MOISTURE. THIS WAS SUGGESTED AS AN AID TO ENGINEERING JUDGMENT IN THE SELECTION AND PREPARATION OF SOIL FOR ROADWAYS. A COMPARISON WAS MADE BETWEEN THEORETICAL DIFFUSION OF MOISTURE AND THE INSTANTANEOUS TIME VARIATION OF MAGNETIC CAPACITANCE DURING THE GRAVITY INFILTRATION OF WATER INTO A LABORATORY MODEL CLAY SOIL. A METER, CAPABLE OF BEING INCORPORATED INTO A SMALL PORTABLE INSTRUMENT OPERATING FROM A CAR BATTERY, WAS DESIGNED AND USED TO MEASURE THE TIME RATE OF CHANGE OF CAPACITANCE OF A STANDARD SOIL DURING WATER INFILTRATION. THE STANDARD SOIL, COMPOSED OF 50 WEIGHT PERCENT HYDRITE 121 AND 50 WEIGHT PERCENT SAND, WAS COMPACTED AND INITIAL DENSITY, MOISTURE CONTENT, AND CAPACITANCE WERE RECORDED. THE PROBES WERE INSERTED INTO THE SOIL, 50 ML OF WATER WAS ALLOWED TO RUN ONTO THE SOIL BETWEEN THE TWO STEEL PROBES, AND THE CAPACITANCE WAS RECORDED AS A FUNCTION OF TIME. AFTER A PERIOD OF NINE MINUTES OR LESS, CAPACITANCE REACHED EQUILIBRIUM, AND THIS CAPACITANCE WAS RECORDED. THIS PROCEDURE WAS REPEATED FOR A TOTAL OF THREE DIFFERENT COMPACTIONS OVER A RANGE OF ZERO TO 35% MOISTURE. A TOTAL OF 64 SAMPLES OF SOIL WAS TESTED. THE RELATION OF CAPACITANCE TO MOISTURE CONTENT AND DENSITY WAS ESTABLISHED FOR THE STANDARD SOIL. /AUTHOR/ WAS ESTABLISHED FOR THE STANDARD SOIL. /AUTHOR/

  • Supplemental Notes:
    • Hpr-1/5/, BPR-65-3S
  • Corporate Authors:

    Louisiana Tech University, Ruston

    Ruston, LA  United States  71272
  • Authors:
    • Huckabay, H K
    • Chew, W W
    • Mount, D E
    • Blunt, J H
  • Publication Date: 1967-8

Subject/Index Terms

Filing Info

  • Accession Number: 00233703
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Jan 8 1994 12:00AM