Evaluation of superpave mixtures containing hydrated lime : tech summary.

Details

• Creators:
  Mohammad, Louay
• Corporate Creators:
  Louisiana Transportation Research Center
• Subject/TRT Terms:
  • Superpave
  • Asphalt mixtures
  • Calcium hydroxide
  • Hot mix paving mixtures
  • Specifications
  • Mechanical properties
  • Pavement performance
  • Evaluation
  • Binders
• Publication/ Report Number:
  LTRC Project No. 05-1B ; State Project No. 736-99-1358
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Design
• Abstract:
  In the mid-1990s the Louisiana Department of Transportation and Development (LADOTD) revised its hot-mix asphalt (HMA) ; mixture specifi cations. Some of those major changes included requiring larger nominal maximum aggregate size in its ; aggregate structure and signifi cantly reducing the amount of fi ne aggregates used in HMA mixtures. Later, in 2003, LADOTD ; implemented the Superpave mixture design method. Mixtures under the Superpave system are encouraged to use coarse ; gradations that pass below the maximum density line, which eventually led to a reduction in the amount of fi ne aggregate ; materials from the aggregate structure. This lower fi ne aggregate content in combination with relatively high in-place air voids ; and high Voids in Mineral Aggregate resulted in Superpave mixtures with high permeability, less resistance to age hardening, ; and poor rut resistance. The addition of quality fi ller materials can be a possible solution to rutting, fatigue cracking, and ; moisture damage in asphalt concrete mixtures. ; This study evaluated the infl uence of hydrated lime on the fundamental engineering properties of HMA mixtures produced with ; the LADOTD Superpave specifi cations. In addition, the eff ects of the method (i.e., slurry or dry) in which hydrated lime was ; introduced to the HMA mixture were also evaluated.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26316/dot_26316_DS1.pdf
• File Type:
  [PDF - 176.75 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:67a71c66a496affe258e56154ae62cf198c697d71fe9f36a8c2d21192a313239