Alternative Materials for Subgrade Modification

Details

• Creators:
  Heckel, Greg
• Corporate Contributors:
  Illinois. Department of Transportation. Bureau of Materials and Physical Research
• Subject/TRT Terms:
  • Subgrade materials
  • Laboratory tests
  • Field tests
  • Subgrade (Pavements)
  • Fly ash
  • Calcium hydroxide
  • Soil stabilization
  • Dense graded aggregates
  • Mix design
• Publication/ Report Number:
  IL-PRR-138
• Resource Type:
  Tech Report
• Geographical Coverage:
  Illinois ; United States
• Corporate Publisher:
  Illinois. Department of Transportation. Bureau of Materials and Physical Research
• Abstract:
  This study examines the laboratory and field performance of two alternative materials used for the modification of unstable (CBR<6) subgrade soils. Modification is temporarily enhancing subgrade stability to improve the constructability of successive pavement layers. The alternative materials included a by-product hydrated lime (BHL) and a Class C fly ash (CCFA) meeting the requirements of AASHTO M 295. Three experimental projects were constructed incorporating these materials with a variety of soil types. The performance of sections treated with these materials was compared to that of control sections treated with a high calcium lime kiln dust (LKD) or dense graded aggregate, depending on site conditions. Information presented in this study includes laboratory background and mix design data, construction procedure evaluation, bearing value and subgrade rut depth data, pavement performance data, and recommended mix design procedures and specifications. The results indicate that BHL and CCFA are acceptable materials for subgrade modification.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/15761/dot_15761_DS1.pdf
• File Type:
  [PDF - 3.29 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:c8bb8e6e76f515fdad6adacdcb732104328d26dc5768a414d72e85228fc848e21b828e26fa51b29ffb957a88255452b8b542d050bea8d1561b9434ad4ef669c4