Packing theory-based framework for performance evaluation of unbound granular materials

Adequate knowledge of the strength and deformation characteristics of unbound layers in pavements is essential for proper thickness design, residual life determination, and economic optimization of the pavement structure. The current knowledge concerning granular materials employed in pavement structures is limited. In addition, to date, no general framework has been established to explain and evaluate satisfactorily the behavior of unbound granular materials under the complex repeated loading which they experience. This thesis presents a packing theory-based framework to evaluate the mechanical properties of unbound granular materials. The framework was developed based on the particle-to-particle contact, the particle size distribution and the packing arrangement. The skeleton of the unbound materials should be composed of both coarse enough particles and a limited amount of fine granular materials to effectively resist deformation and carry traffic loads. Based on this, the framework identifies the two basic components of unbound granular materials, namely the primary structure (PS) - a range of interactive coarse grain sizes that forms the main load carrying network in granular materials and the secondary structure (SS) - a range of grain sizes smaller than the PS providing stability to the aggregate skeleton.

• Record URL:
  • http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143487
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9789187353369
• Supplemental Notes:
  • Doctoral thesis
• Authors:
  • Yideti, T F
• Publication Date: 2014

Language

• English

Media Info

• Pagination: 1 file
• Serial:
  • Issue Number: 14:001

Subject/Index Terms

• TRT Terms: Evaluation; Granular soils; Particles; Pavement components; Performance; Properties of materials
• Uncontrolled Terms: Materials technology (asphalt/bitumen/concrete)
• Geographic Terms: Sweden
• ATRI Terms: Evaluation; Granular; Material properties; Particle size distribution; Pavement materials; Performance
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01525000
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 9789187353369
• Files: ATRI
• Created Date: May 19 2014 12:43PM