RESILIENT PROPERTIES AND MICROSTRUCTURE OF MODIFIED FLY ASH-STABILIZED FINE-GRAINED SOILS

A comprehensive study on the application of Class F fly ash for stabilizing subgrade soils in Taiwan is presented. Lime (or cement) was used with fly ash to enhance its self-cementing behavior in the study. Laboratory testing included using the plasticity index method to determine the optimum percentages of additive and fly ash. Through a resilient modulus (M sub r) test program, these percentages were confirmed. A section of test road with treated subgrade constructed on the West Coast Highway has been open to traffic for 40 months to date. A field investigation of this section was part of this study. Results from field California bearing ratio tests indicate that treatment of the subgrade soil had improved its properties by a factor of 10 to 15. Specimens obtained from the field were also evaluated through an M sub r test program, and the results were compatible with those for laboratory-made samples. Finally, a microstructure study is presented showing significant cementitious materials in laboratory and field specimens. Confidence about the future application of Class F fly ash for stabilizing subgrade soils in Taiwan and for handling this problematic waste material is provided.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1995/1486/1486-011.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=RESILIENT+PROPERTIES+AND+MICROSTRUCTURE+OF+MODIFIED+FLY+ASH-STABILIZED+FINE-GRAINED+SOILS&author=D.+Chang&publication_year=1995
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1486, Environmental Testing and Evaluation of Stabilized Wastes, Performance of Stabilized Materials, and New Aggregate Tests. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Chang, Dave Ta-Teh
• Publication Date: 1995

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 88-96
• Monograph Title: Environmental testing and evaluation of stabilized wastes, performance of stabilized materials, and new aggregate tests
• Serial:
  • Transportation Research Record
  • Issue Number: 1486
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Calcium oxide; California bearing ratio; Field studies; Fly ash; Laboratory tests; Microstructure; Modulus of resilience; Pavement subgrade; Plasticity index; Soil stabilization; Test sections
• Uncontrolled Terms: Stabilization
• Geographic Terms: Taiwan
• Old TRIS Terms: Field investigations
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00713591
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Nov 22 1995 12:00AM