Clay Microstructure and Ice Nucleation.

• Main Author: Pusch,Roland
• Other Authors: TECHNICAL UNIV OF NORTHERN SWEDEN LULEA DIV OF SOILS MECHANICS
• Format: Text
• Language: English
• Published: 1978
• Subjects: Geology; Geochemistry and Mineralogy; Snow; Ice and Permafrost; *ICE; *CLAY; MICROSTRUCTURE; X RAY DIFFRACTION; TEST EQUIPMENT; GRAIN SIZE; NUCLEATION; SOIL MECHANICS; MOISTURE CONTENT; SURFACES; SALINITY; MINERALOGY; DILATOMETERS; ASH57; WU00624; PE61102A; Ice; permafrost
• Online Access: http://www.dtic.mil/docs/citations/ADA056815; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA056815

The microstructural difference between weakly aggregated ('dispersed') and strongly aggregated clays means that a larger part of the water is structurally unaffected by clay mineral lattices in the last-mentioned type of clay which should therefore have a lower content of unfrozen water. This hypothesis was tested and found to be valid in an investigation where two such clays were actually compared with reference to the content of unfrozen water. The results from dilatometer and spin echo tests clearly show that this content is dependent not only on the specific surface area but also on the microstructural constitution expressed in terms of the degree of aggregation. (Author)