Evaluation of superpave mixtures containing hydrated lime : tech summary.

Details

• Creators:
  Mohammad, Louay
• Corporate Creators:
  Louisiana Transportation Research Center
• Subject/TRT Terms:
  Asphalt Mixtures Binders Calcium Hydroxide Evaluation Hot Mix Paving Mixtures Mechanical Properties Pavement Performance Specifications Superpave
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:67a71c66a496affe258e56154ae62cf198c697d71fe9f36a8c2d21192a313239
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26316/dot_26316_DS1.pdf
• File Type:
  [PDF - 176.75 KB ]