Performance Evaluation of Subgrade Stabilization with Recycled Materials

Due to rising costs of good quality acceptable materials for remove/replace options and traditional subgrade stabilization materials, the Michigan Department of Transportation (MDOT) is in need to identify potential recycled materials to treat unacceptable subgrade soils. Use of recycled materials may not only provide less costly alternatives for subgrade stabilization, their use may also alleviate landfill disposal challenges. This research study is aimed at identifying short-term and long-term advantages and disadvantages associated with subgrade stabilization using recycled materials such as Cement Kiln Dust (CKD), Lime Kiln Dust (LKD), fly ash (FA), concrete fines and mixtures of LKD and FA. An extensive laboratory testing program was conducted to determine suitability of the above recycled stabilizers for subgrade stabilization for common problematic soils found in Michigan. The laboratory investigative program involved determining the basic soil properties, developing mix designs to select proper stabilizer percentage for each soil type, California bearing ratio (CBR) testing to determine pavement design parameters, and laboratory freeze/thaw testing to determine durability of stabilized subgrade sections. A limited field investigation was performed to assess in situ performance of stabilized subgrades. Based on the findings of both investigations, stabilizers were selected for long-term subgrade stabilization for different soil types and their associated pavement design inputs were determined. A design matrix with cost considerations was also developed to aid the selection of subgrade treatment options.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 201p

Subject/Index Terms

Filing Info

  • Accession Number: 01598808
  • Record Type: Publication
  • Report/Paper Numbers: RC-1635
  • Contract Numbers: 2013-0065
  • Files: TRIS, ATRI, STATEDOT
  • Created Date: Apr 26 2016 9:36AM