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:
  Calcium Oxide Field Tests Laboratory Tests Pavement Design Pavement Layers Soil Stabilization 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:40ee6f24d561fb47ca2d1c3e0d659c3de99d54402ebf8d480026e38b646c370a
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29002/dot_29002_DS1.pdf
• File Type:
  [PDF - 274.44 KB ]