Lime utilization in the laboratory, field, and design of pavement layers : [research project capsule].

Details

• Creators:
  Elseif, Mostafa
• Corporate Creators:
  Louisiana Transportation Research Center
• Subject/TRT Terms:
  • Pavement design
  • Pavement layers
  • Calcium oxide
  • Soil stabilization
  • Field tests
  • Laboratory tests
  • Specifications
• Publication/ Report Number:
  15-2GT
• Resource Type:
  Brief
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  Nearly two-thirds of highways in the United States are constructed on in-place soils ; with poor or undesirable characteristics. These materials demonstrate undesirable ; engineering behavior, such as low bearing capacity, high shrink/swell potential, and ; poor durability. Removing these existing soils can be expensive and/or impractical. ; Traditionally, modification and stabilization of the soil with lime, cement, and fly ash ; has been used to facilitate the construction process and to enhance the mechanical ; properties of the soil. For successful soil modification and stabilization, selecting ; an optimum content of a suitable stabilizer is critical. Adequate mixing, curing, and ; compaction are other important factors to achieve satisfactory field performance. Lime ; is generally more suited for treating plastic clays with shrink/swell potential. The two ; main reactions from lime are cation exchange and flocculation-agglomeration; both of ; these reactions significantly improve soil properties and workability. ; Lime modification is a time-tested practice in Louisiana to create a working table and its ; performance has been generally adequate. However, the working table is not assigned ; a structural coefficient value during the design process. Nevertheless, lime modification ; and stabilization can offer numerous advantages: improved soil properties, especially for ; expansive soils; strength gain with time; and possible reduction in pavement thickness ; if accounted for during the pavement design. The consideration of lime is justified given ; that laboratory and field studies show that lime-modified subgrades outperform soils ; without lime modification.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29002/dot_29002_DS1.pdf
• File Type:
  [PDF - 274.44 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:40ee6f24d561fb47ca2d1c3e0d659c3de99d54402ebf8d480026e38b646c370a