DETERMINATION OF UNFROZEN WATER CONTENT IN CLAY BY THE CALORIMETER METHOD

BESTAEMNING AV OFRUSEN VATTENHALT I LEROR ENLIGT KALORIMETERMETODEN

During frost penetration through a road pavement the water contained in the pavement freezes. The depth of frost is mainly dependent upon the amount of water that freezes for a given degree of coldness. Observations in the field have shown that the depth of frost penetration is larger than the theoretically calculated values. One reason for this is considered to be that only part of the available water freezes. In order to get a more reliable background to calculation of frost depth, a calorimetric investigation of unfrozen water was made on three different clayey soils. Each soil was mixed with distilled water to water contents of 15,20 and 25% dry weight and put into a freezing cabinet at temperatures -2, -4 and -6 deg C during 1 to 19 days. The unfrozen water contents were found to be 4,5 - 8% at -6 deg C, 6 - 9% at -4 deg C and 8 - 12% dry weight at -2 deg C for the different soils. A theoretical comparison of the significance of adsorption and capillary water for the amount of unfrozen water was made and led to the conclusion that adsorption water was dominant. /TRRL/

• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • Stenberg, L
• Publication Date: 1975

Language

• Swedish

Media Info

• Features: Figures; References; Tables;
• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Absorption; Adsorption; Calorimeters; Capillary water; Clay; Clay soils; Depth; Freezing; Frost; Heat; Measuring instruments; Moisture content; Pendulum tests; Soils; Water control
• Uncontrolled Terms: Frost penetration
• ITRD Terms: 1643: Accident; 2894: Alignment; 2914: Central reserve; 2808: Climbing lane; 8614: Database; 2755: Highway; 6488: Length; 1822: Overtaking; 624: Speed limit; 6555: Statistics; 671: Traffic flow; 2980: Wearing course; 6479: Width
• Subject Areas: Geotechnology; Highways; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00163323
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Report No. 232 Monograph
• Files: ITRD, TRIS
• Created Date: Mar 7 1978 12:00AM