A COMPREHENSIVE EVALUATION OF UNBOUND GRANULAR MATERIAL RESPONSE FOR ITS USE IN PAVEMENT DESIGN AND EVALUATION STUDIES

An evaluation of dynamic response of granular materials is presented. A total of 432 test results obtained at the University of Birmingham are used as the data base. The objectives have been (1) to determine if typical resilient modulus relationships exist for various granular material types; (2) to develop a comprehensive summary of factors and factor interactions affecting the modulus response; (3) to determine if predictive equations and/or typical relationships could be stated and (4) to investigate any correlations found to exist between laboratory measured resilient modulus, laboratory measured CBR values, peak shear stress ratio on a large direct shear box as proposed by Pike at Transport and Road Research Laboratory, UK and a simple low cost impact hammer test developed in Australia. There appears to be an inverse relationship between coefficients k-1 and k-2. Six unique relationships concerning k-1 and k-2 are proposed for six of the most common types of granular materials representative of both artificially produced aggregates such as brick ballast and slag and of naturally occurring gravel, limestone, granite and basalt material types. It is found that a general, but variable, correlation does exist between laboratory measured resilient modulus and CBR values. However the constant relating these variables is a function of stress state. For typical bulk stress values anticipated under highway pavements, the coefficient is significantly lower than the value of 10 suggested by Heukelom and Foster and Nottingham University workers. In addition a correlation of CBR values with peak shear stress ratio obtained on a large direct shear box apparatus and simple impact test values on an impact tester developed in Australia appears possible. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8251904803
• Supplemental Notes:
  • Proceedings of the International Symposium on Bearing Capacity of Roads and Airfields, Volume 2, Trondheim, June 23-25, 1982.
• Corporate Authors:

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 
• Authors:
  • Lees, G
  • Bindra, S
• Conference:
  • Proceedings of the International Symposium on Bearing Capacity of Roads and Airfields, Volume 2, Trondheim, June 23-25, 1982.
• Publication Date: 1982

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 670-683

Subject/Index Terms

• TRT Terms: Aggregates; California bearing ratio; Compaction; Conferences; Crash tests; Dynamic loads; Evaluation; Forecasting; Granular materials; Mathematical models; Measurement; Modulus of elasticity; Modulus of resilience; Pavement design; Pavement performance; Pavements; Shear strength; Shear stress; Stresses
• Uncontrolled Terms: Dynamic response
• Old TRIS Terms: Hammer tests
• ITRD Terms: 4577: Aggregate; 3087: California bearing ratio; 3686: Compaction; 8525: Conference; 4107: Granular; 6473: Mathematical model; 6136: Measurement; 5919: Modulus of elasticity; 3055: Pavement design; 5531: Shear; 5575: Stress (in material)
• Subject Areas: Design; Geotechnology; Highways; Pavements; Research; I22: Design of Pavements, Railways and Guideways; I36: Aggregates;

Filing Info

• Accession Number: 00376474
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• ISBN: 82-519-0480-3
• Report/Paper Numbers: Proceeding
• Files: ITRD, TRIS
• Created Date: Aug 30 1983 12:00AM