Accession Number : AD0675532

Title :   DIFFICULTIES ASSOCIATED WITH PREDICTING DEPTH OF FREEZE OR THAW.

Descriptive Note : Research paper,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF BUILDING RESEARCH

Personal Author(s) : Brown,W. G.

Report Date : 1964

Pagination or Media Count : 15

Abstract : Calculations using the Neumann solution (as modified by Aldrich) and thermal properties of soils (obtained by Kersten) show that the frost penetration depth for the same freezing index for essentially all soils with any moisture content and for dry sand and rock varies by a factor of about 2 to 1. The extremes calculated in this way bracket the experimentally determined design curve of the US Army Corps of Engineers and give it theoretical support. The theoretical calculations and additional experimental data are used as a basis for a small alteration in the slope of the design curve. This modified design curve is recommended for field use because of (1) inherent imperfections in existing theory and (2) practical limitations to precise specification of field conditions. (Author)

Descriptors :   (*SOILS, FREEZING), THERMAL PROPERTIES, MOISTURE, CLAY, SAND, ROCK, CONDUCTION(HEAT TRANSFER), FROST HEAVE, SOIL MECHANICS, CANADA

Subject Categories : Soil Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE