California Department of Transportation

Slurry/Micro-Surface Mix Design Procedure

Pooled Fund Project: RE-0211-01; SPR-3(073)


  1. Develop mix design procedures
    • Identify the critical properties of the mix and raw materials that relate to performance and ensure material compatibility of the different components
    • Identify/develop tests that will evaluate the raw materials and mix for the critical properties described above
    • Identify/develop tests to evaluate if the mixture can be properly mixed and placed
    • Identify/develop tests to evaluate the setting and curing characteristics of the mix
    • Develop an initial mix design that incorporates these properties and tests, and addresses various environmental and surface conditions
  2. Develop guidelines and specifications for use and application
    • Ensure proper mixing, wetting and adhesion in the field
    • Ensure that the mixture does not segregate during field application
    • Ensure a homogeneous spreading of the treatment over the pavement surface
    • Provide guidance on the emulsion curing characteristics that take into account different surfaces, traffic volumes and environmental conditions
    • Provide guidance on the appropriate use of this treatment that include, as a minimum, pavement and environmental conditions, traffic characteristics (including ADT ranges) and road geometry (e.g., grades, intersections, etc.)
    • Identify the characteristics that ensure long term performance
    • Provide guidance on project selection
    • Provide recommended specifications for use on projects
  3. Develop a training program.
    • Develop a training workshop that incorporates all aspects of slurry/micro-surfacing for a wide range of target audience including transportation agencies, contractors and suppliers
    • Develop a pre-job training module for inspectors and contractor’s staff