00237508

Component

http://onlinepubs.trb.org.../hrbbulletin/71/71-004.pdf

TEST INSTALLATIONS OF THERMOCOUPLES MEASURING GROUND TEMPERATURES BENEATH RUNWAY PAVEMENTS AT THREE SITES IN ALASKA ARE DESCRIBED. DATA OBTAINED FROM THESE INSTALLATIONS OVER A PERIOD OF SEVERAL YEARS ARE UTILIZED TO DETERMINE DEPTHS AND RATES OF PENETRATION OF FROST AND THAW. A THEORETICAL METHOD OF CALCULATING FROST AND THAW PENETRATION UTILIZING SOILS DATA, AIR TEMPERATURE DATA, AND PREDETERMINED THERMAL CONDUCTIVITY VALUES AND SURFACE CORRECTION FACTORS IS EXPLAINED. RESULTS OF CALCULATIONS BY THIS METHOD ARE COMPARED WITH THE FROST AND THAW DEPTHS INDICATED BY THE THERMOCOUPLES READINGS. IN CERTAIN INSTANCES FROST CONDITIONS OBTAINED BY BORINGS AND TEST PITS ARE AVAILABLE FOR COMPARISONS WITH THE THEORETICAL RESULTS. IT IS CONCLUDED THAT THE THEORETICAL METHOD IS A USEFUL TOOL FOR MAKING ESTIMATES OF FROST CONDITIONS IN RUNWAY SECTIONS. THE DEPTH OF FROST AND THAW PENETRATION MAY BE COMPUTED WITH A RESULTING ERROR OF 1 TO 3 FT. IN SOILS WHERE ACTUAL PENETRATION IS FROM 6 TO 15 FT., PROVIDED ADEQUATE SOIL AND AIR TEMPERATURE DATA ARE AVAILABLE. /AUTHOR/

No 71, pp 81-98, 8 FIG, 6 TAB, 3 REF 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

01408189

Aldrich Jr, Harl P; Paynter, Henry M

1953

Highway Research Board Bulletin

Airport runways; Depth; Freeze thaw tests; Frost; Soils; Temperature; Temperature measurement; Theory; Thermal conductivity; Thermocouples

Frost penetration

Geotechnology; Highways; Pavements

TRIS, TRB, ATRI

Jul 15 1994 12:00AM

• COLD-ROOM STUDIES OF FROST ACTION IN SOILS, A PROGRESS REPORT
• FROST DESIGN CRITERIA FOR PAVEMENTS
• Frost-Action Research Needs
• SOIL-TEMPERATURE COMPARISONS UNDER VARYING COVERS