FLEXURAL PROPERTIES OF SNOW AND SNOW-ICE.
Abstract
One testing objective was to determine if small, select samples of natural snow-ice, tested in bending, would provide consistent and higher values for the flexural strength and modulus of elasticity. Another objective was to investigate the surface bearing properties of snow-ice layers, formed during winter on lakes or rivers, which are often separated from clear ice by an interlayer of slush or water. The apparatus used in testing the snow-ice was a modification of a Soiltest hand-operated press with a 0- to 5000-lb wooden, three-point load device. Dense snow-ice at +5 degrees had high flexural strength (avg. 347.5 psi) and a high modulus of elasticity (avg. 6.08 x 100000 psi), probably the result of a large, interlocking crystal structure. The apparent relationship between modulus of elasticity and density of snow-ice is affected by the rate of loading and temperature. There appears to be a relationship between density and flexural strength for snow, snow-ice, and high-density snow in the natural undisturbed state; but processing, including snow compaction, lowers the tensile strength at early ages. The formulas used in computations are given and test results are tabulated and summarized. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1964
- Accession Number
- AD0610143
Entities
People
- S. Russell Stearns
Organizations
- Dartmouth College