Mechanistic Approach for Fiber-Reinforced Flexible Pavements

The present study investigates the benefits of reinforcing the subgrade soils in flexible pavements. Three types of Soils A, B, and C, and one type of polypropylene fiber having aspect ratios of 50, 84, and 100 were selected. The California bearing ratio (CBR) and unconfined compressive strength tests were conducted on unreinforced and reinforced soils. The optimum quantity of fibers was decided based on CBR, modulus of elasticity (Ei) and failure stress. The static triaxial tests were conducted on unreinforced and reinforced soils as well as on other pavement layers at a confining pressure of 40 kPa. These stress-strain data were used as input parameters for evaluating the vertical compressive strain at the top of subgrade soils using elastoplastic finite-element analysis. This vertical compressive strain at the top of unreinforced and reinforced subgrade soils was used for estimating the improvement in service life of the pavement or reduction in thicknesses of different layers for the same service life due to reinforcing the subgrade soils.

• Record URL:
  • https://doi.org/10.1061/(ASCE)0733-947X(2008)134:1(15)
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
• Authors:
  • Chandra, Satish
  • Viladkar, M N
  • Nagrale, Prashant P
• Publication Date: 2008-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 15-23
• Serial:
  • Journal of Transportation Engineering
  • Volume: 134
  • Issue Number: 1
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-947X
  • Serial URL: https://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: California bearing ratio; Compressive strength; Failure; Fiber reinforced materials; Finite element method; Flexible pavements; Material reinforcement; Mechanical properties; Modulus of elasticity; Service life; Soils; Static tests; Subgrade (Pavements); Triaxial shear tests
• Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01084523
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 28 2008 8:08AM