00237740

Component

http://onlinepubs.trb.org...rbbulletin/100/100-002.pdf

A PRELIMINARY REPORT IS GIVEN ON A NEW METHOD OF DETERMINATION OF FROST IN THE SOIL PROFILE IN SITU. THE METHOD INVOLVES INTERPRETATION OF ELECTRICAL RESISTANCES OBTAINED WITH A SOIL-MOISTURE BLOCK AND THEIR ASSOCIATED SOIL TEMPERATURES, A METHOD DEVELOPED AT THE MICHIGAN HYDROLOGIC RESEARCH STATION AS A RESULT OF CORRELATIONS NOTED FROM DAILY FIELD RECORDS OF SOIL MOISTURE AND TEMPERATURES. A HYPOTHESIS RELATING THESE PHENOMENA WAS FORMULATED AND SUBSTANTIATED BY FIELD AND LABORATORY STUDIES. UNDER CERTAIN CONDITIONS AN ABRUPT 200-OHM INCREASE IN THE ELECTRICAL RESISTANCE OF THE PLASTER-OF-PARIS MOISTURE UNIT WAS A SATISFACTORY INDICATOR OF THE COMMENCEMENT OF CRYSTALLIZATION OF MOISTURE. TEST INSTRUMENTATION AND GRAPHIC RESULTS OF THE LABORATORY TESTS ARE ILLUSTRATED. /AUTHOR/

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. No 100, pp 17-21, 4 FIG, 6 REF

01410504

1955

Highway Research Board Bulletin

Digital/other

Field tests; Frost; Laboratory tests; Resistance (Electricity); Soil profiles; Soil water; Soils; Temperature; Testing equipment

Geotechnology; Highways

TRIS, TRB

Jul 7 1994 12:00AM

• FREEZING-AND-THAWING TESTS ON MIXTURES OF SOIL AND CALCIUM CHLORIDE
• FROST ACTION ON SMALL FOOTINGS