DETERMINATION AND SIGNIFICANCE OF RESILENT BIMODULAR PROPERTIES OF STABILIZED SOILS

The differences between the values of resilient moduli of stabilized soils measured by using repeated compression, tension flexure, and split-tension tests and the actual resilient moduli in tension and compression are explained analytically. Results indicate that values of resilient moduli measured by using repeated tension and compression tests agree well with actual values for specimens that have length-to-width ratios of 2 and caps that are at least ten times as stiff as the stabilized material in compression. Repeated flexure tests give values of resilient moduli that are lower or higher than actual values, depending on the dimensions of the specimen, the fixity at points of load application, and the method of calculation used. However, a good estimate of resilient moduli in tension and compression can be obtained for beam specimens that have length-to-width ratios equal to 4 and no lateral supports at points of load application by using simple beam-theory assumptions for a bimodular material (i.e. different moduli in tension and compression). A procedure for the determination of resilient bimodular properties (i.e., resilient tensile and compressive moduli) by using the repeated split-tension test is developed and gives values for resilient moduli in tension and compression that do not deviate from the actual values by more than 16 and 11 percent respectively. The significance of the resilient bimodular properties on the response of stabilized layers under traffic loads is assessed analytically. The results show that tensile stresses and strains on the underside of the stabilized layer are highly influenced by the resilient compressive and tensile moduli of the material. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 92-98
  • Monograph Title: Analysis of pavement systems
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00193386
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 26 1979 12:00AM