Establishing a Mechanistic/Incremental Design Method for Semi-Rigid Pavements through HVS Testing

Highway pavements with cement treated bases (CTB) have been disfavoured in Danish construction practice since the end of the 1970's, after a number of projects experienced premature reflective cracking. However, after surveys in 2002-3 had shown superior performance of other pavements with CTB layers, especially on heavily trafficked sections, interest was resurrected. The motivation was partly the need for long-life pavements on critical network links, but also a desire to promote competition to the flexible-pavement construction industry. In 2003 a research consortium was formed to carry out a full-scale test on 6 semi-rigid pavements - 3 types, each replicated. The test was carried out to establish deterioration models and fatigue design criteria for cement- and similarly stabilized layers. 3 of the pavements were instrumented to provide data on critical strains and stresses. Fatigue loading was carried out with a Heavy Vehicle Simulator, and bearing capacity development was monitored through Falling Weight Deflectometer (FWD) and Light Weight Deflectometer (LWD) loading. During loading, the bearing capacity of the stabilized layer decreased at a steadily slowing rate, which could be described through a single, generalized incremental-recursive model based on tensile strain in the bottom of the layer. The deterioration model was verified against data derived from existing, heavily trafficked motorways that had been in service for more than 20 years, and it was found that the model was accurate without any shift factors. On this basis are established new, traditional mechanistic design criteria as well as incremental-recursive models that will go into Danish pavement design standards.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784408661
• Corporate Authors:

  American Society of Civil Engineers

  Geo-Institute
  Reston, VA  United States  20191-4400
• Authors:
  • Busch, Christian
  • Henrichsen, Anders
  • Thorgersen, Finn
• Conference:
  • Pavement Mechanics and Performance - GeoShanghai International Conference
  • Location: Shanghai , China
  • Date: 2006-6-6 to 2006-6-8
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 117-125
• Monograph Title: Pavement Mechanics and Performance: Proceedings of Sessions of GeoShanghai, June 6-8, 2006, Shanghai, China

Subject/Index Terms

• TRT Terms: Bearing capacity; Deterioration; Falling weight deflectometers; Freeways; Heavy vehicles; Loads; Mechanical fatigue; Mechanical strain; Mechanistic design; Pavement base course; Pavement design; Pavement performance; Pavements; Perpetual pavements; Stresses; Tension
• Uncontrolled Terms: Cement treated bases; Heavy traffic; Incremental design; Light weight deflectometers; Reflective cracking; Semi-rigid
• Geographic Terms: Denmark
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 01038869
• Record Type: Publication
• ISBN: 0784408661
• Files: TRIS
• Created Date: Dec 29 2006 11:08AM