Amelioration of Expansive Clay Slopes Using Calcium Chloride

Lime continues to be one of the most popular chemical admixtures used to modify expansive clays despite the associated mixing and pulverization problems. In the present investigation, the efficacy of CaCl subscript 2 in place of conventionally used lime is studied by conducting laboratory and field tests. These investigations were carried out on the slopes of a trapezoidal trench made in expansive clay bed. Heave measurements were taken on the lime and CaCl subscript 2 treated slopes and also on untreated slopes for four consecutive cycles of wetting and drying. The field cyclic seasonal movements and the subsequent laboratory tests on undisturbed and disturbed soil samples revealed that the CaCl subscript 2 could be a promising chemical modifier instead of conventionally used lime, not only due to its multifold influence on heave control, plasticity reduction, and swell properties but also its easy application in the form of solution without any need for pulverization and mixing. Though an apparent reduction in unconfined compressive strength of treated samples is observed, the drained triaxial tests on treated and untreated samples revealed that there is an increase in the angle of internal friction of treated samples.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Authors:
  • Murty, V Ramana
  • Krishna, P Hari
• Publication Date: 2007-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 19-25
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 19
  • Issue Number: 1
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Calcium chloride; Calcium oxide; Chlorides; Comminution; Compressive strength; Cyclic tests; Disturbed samples; Drained soil; Expansive clays; Field tests; Internal friction; Laboratory tests; Measurement; Plasticity; Slopes; Soil lime mixtures; Swelling; Trenches; Triaxial shear tests; Undisturbed samples; Wetting and drying tests
• Uncontrolled Terms: Seasonality; Soil heave
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01042760
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 18 2007 2:54PM