Accession Number : AD0770425

Title :   Measuring the Thermal Properties of Cylindrical Specimens by the Use of Sinusoidal Temperature Waves.

Descriptive Note : Technical rept.,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Hoekstra,P. ; Delaney,A. ; Atkins,R.

Report Date : OCT 1973

Pagination or Media Count : 21

Abstract : An apparatus for measuring the thermal diffusivity of cylindrical specimens of soil and rock was constructed and tested. The amplitude of the temperature wave used was about 1C and the frequency of the wave was two cycles per hour. Because the direction of the temperature gradient is constantly reversed, the method has advantages for specimens where water migration is a problem. Also, because of the small temperature differentials that can be used the method is suited for materials for which the thermal properties are temperature dependent, such as, for example, frozen ground in the temperature range from zero C to minus ten C.

Descriptors :   *Thermal properties, *Soils, *Rock, *Measuring instruments, Diffusivity, Permafrost, Thermal conductivity, Costs, Sand, Clay, Freezing

Subject Categories : Soil Mechanics
      Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE