SURFACE HARDENING OF COMPACTED SNOW BY CONTROLLED SOLAR RADIATION ABSORPTION.

The snow surfaces of compacted-snow roads and runways often do not have adequate surface hardness and wearing ability for repeated traffic. Laboratory tests were conducted at the Naval Civil Engineering Laboratory to study the increase in surface hardness and wearing ability of compacted snow by mel...

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Bibliographic Details
Main Author: Stehle,Nancy S.
Other Authors: NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
Format: Text
Language:English
Published: 1965
Subjects:
Snow
Ice and Permafrost
(*SNOW
TRAFFICABILITY)
SURFACE PROPERTIES
HARDNESS
ABSORPTION
EXPOSURE(PHYSIOLOGY)
ATMOSPHERIC TEMPERATURE
SHEAR STRESSES
COMPRESSIVE PROPERTIES
SOLAR RADIATION
ROADS
RUNWAYS
POLAR REGIONS
ANTARCTIC REGIONS
MCMURDO SOUND
Antarctic
McMurdo Sound
Antarc*
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0684406
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0684406
Description
Summary:The snow surfaces of compacted-snow roads and runways often do not have adequate surface hardness and wearing ability for repeated traffic. Laboratory tests were conducted at the Naval Civil Engineering Laboratory to study the increase in surface hardness and wearing ability of compacted snow by melting and refreezing the surface snow through controlled absorption of solar radiation by black plastic on the snow surface. In 6- to 8-hour test exposures, the greatest increase in shear strength in the top 6 inches of the snow, the measure of surface hardness for these tests, occurred at +5F after 6-1/2 hours of exposure to 1.10 Langleys/min, equal to 1.1 gm cal/sq cm/min or 243.3 Btu sq ft/hr. (Author)

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