Models to Estimate K Subgrade Reaction Modulus Values Based on Deflection Basin Parameters

The structural design of concrete pavements according to AASHTO and PCA methods makes use of modulus of reaction (k) from the subgrade and subbase/subgrade system as parameter to calculate slab thickness. Conventionally, the k-values must be determined through NDT testing that is expensive and lengthy. The objective of this paper is to present a correlation between k-values and deflection measurements, which are easier and cheaper to obtain; thereby giving the inspector a faster method to determine and check the desired k-values. The correlations are results of a computer simulation with the ELSYM-5 software program. The resulting models from the maximum deflection and area parameter had good results, unlike the radius of curvature. These models provide improved ability and agility in the evaluation of subgrade layers and the subbase of concrete pavement, when compared to the plate bearing test.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780415871990
• Supplemental Notes:
  • Abstract reprinted with permission of Taylor & Francis.
• Corporate Authors:

  CRC Press/Balkema

  P.O. Box 447
  2300 AK Leiden,   Netherlands 
• Authors:
  • Suzuki, Carlos Yukio
  • Santos, CRG
  • Ferri, S
  • Lopes, F M
  • Cruz, RTG
  • Azevedo, A M
• Conference:
  • Bearing Capacity of Roads, Railways and Airfields. 8th International Conference (BCR2A'09)
  • Location: Champaign IL, United States
  • Date: 2009-6-29 to 2009-7-2
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Web
• Edition: e-book ISBN 9780203865286
• Features: Figures; References; Tables;
• Pagination: pp 571-579
• Monograph Title: Bearing Capacity of Roads, Railways and Airfields. Proceedings of the 8th International BCR2A'09 Conference

Subject/Index Terms

• TRT Terms: Concrete pavements; Curvature; Evaluation and assessment; Instruments for measuring deformation or deflection; Mathematical models; Simulation; Slabs; Structural design; Subbase (Pavements); Subgrade (Pavements); Thickness
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01343160
• Record Type: Publication
• ISBN: 9780415871990
• Files: TRIS
• Created Date: Jun 28 2011 2:00PM