DYNAMIC CHARACTERIZATION OF CEMENT-TREATED BASE AND SUBBASE MATERIALS

In recent years, the resilient modulus has been introduced for evaluating pavement material response. A comprehensive laboratory evaluation of resilient modulus, Mr, of five cement-treated base (subbase) materials used by the Maryland State Highway Administration are presented in this paper. A total of 84 specimens, having factorial mix combinations of material type, gradation, cement content, density level, and curing period, were used to investigate their influence on the Mr response. In addition, the static modulus test was performed on each specimen to determine its static modulus, E, as well as the unconfined compressive strength, qu. It has been found that the cement content, material type, and gradation are the major influence on modulus response. The water needed for cement hydration, as well as the optimum moisture content needed for maximum density, were found to affect the results. The resilient modulus becomes more independent on repeated axial deviator stress when the cement content and/or curing period increase. The test results suggest that different relationships between resilient modulus and unconfined strength exist for the cement-treated dense-graded aggregate (DGA) and soil cement materials. Separate equations were therefore developed and presented. For design of flexible pavements, new layer coefficient-resilient modulus nomographs were developed. As for rigid pavement, a more precise evaluation of the composite modulus of subgrade reaction is presented.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 41-48
  • Monograph Title: Geotechnical engineering research
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00455839
  • Record Type: Publication
  • ISBN: 0309039223
  • Files: TRIS, TRB
  • Created Date: May 31 1986 12:00AM