SOME FACTORS THAT AFFECT THAW STRAIN

Factors that affect the thaw strain of a remolded clay were studied by using conventional isotropic and anisotropic consolidation techiques. A test sequence was developed to simulate a temperature history experienced by soils in many parts of the continental United States. The test sequence was divided into 24-h increments and included isothermal consolidation undrained freezing, undrained thaw, and isothermal recompression. For all test sequences, the loading applied before the consolidation phase was held constant throughout the test period. The effect of various factors on thaw strain was determined by comparison of results obtained from isotropically and anisotropically loaded samples subjected to confining pressures of 103, 207, and 414 kPa (15, 30, and 60 lbf/sq in.). In addition, the effect of repeated freeze-thaw was obtained form tests where the undrained freeze and undrained thaw phase of the test sequence was repeated up to four times. Results from the test indicate that thaw strain increases with increasing principal stress ratio and also increases as the confining pressure descreases. It was also observed that excess pore pressures developed during the undrained freezing and undrained thaw phase of the test and that these pore pressures are closely related to the development of thaw strain. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 6-10
  • Monograph Title: Moisture and frost-related soil properties
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00193793
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 11 1979 12:00AM