BITUMEN COATING VERSUS PLASTIC SHEETING FOR REDUCING NEGATIVE SKIN FRICTION

Two methods--plastic sheeting and conventional bitumen coating--for negative skin friction reduction in end-bent piles behind proprietary mechanically stabilized earth walls were investigated. Concrete blocks were prepared and arranged in various fashion with polyethylene sheets and bitumen materials, and tested in the laboratory using a direct-shear apparatus. Temperature, shear rate, and normal stresses influenced shearing resistance of the concrete-bitumen-soil samples. The highest shearing resistance was observed in bitumen-coated samples tested with crushed limestone. Wrapping concrete piles with polyethylene sheets reduced skin friction by 78 percent. Lubricating the polyethylene sheets with oil added to the reduction; effectiveness in reducing skin friction climbed to 94 percent. Friction characteristics of the polyethylene sheeting were not influenced by factors that affect the shearing behavior of the bitumen coating. Based on the study results, two formulas were recommended for estimating the shearing resistance of the bitumen-soil matrix and lubricated sheets.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Tawfiq, K S
  • Caliendo, J A
• Publication Date: 1995-2

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 69-81
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 7
  • 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: Bituminous coatings; Ethylene resins; Formulas; Laboratory tests; Lubrication; Negative skin friction; Plastics; Shear rate; Shear strength; Sheathing; Skin friction; Stresses; Support piles; Temperature
• Uncontrolled Terms: Polyethylene
• Old TRIS Terms: Negative friction; Plastics applications
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00675547
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 29 1995 12:00AM