Superpave volumetric mixture design and analysis handbook

  • What apparatus is used in Superpave mix design?

    Superpave Mix Design Analysis
    Each trial mix sample is compacted in the Superpave gyratory compactor using three different gyration cycles based on 20-year traffic loading estimates in millions of ESALs from AASHTO R 35: Ninitial: This number of gyrations measures compactibility of the mix during construction..

  • What are Superpave tests?

    Overview.
    The Superpave Shear Tester (SST) (Figure 1) is used to characterize a HMA mixture's resistance to permanent deformation (rut resistance).
    This characterization can be used as a performance test for HMA mixtures designed using Superpave mix design or other mix design procedures..

  • What are the criteria for Superpave?

    Superpave mixture design criteria include air voids, VMA, and voids filled with asphalt (VFA).
    Meeting the VMA minimum criterion is usually difficult to achieve during mix design and typically even more difficult to achieve in the plant-produced material..

  • What is Superpave specification?

    Superpave specifications limit the percentage of particles with a maximum-to- minimum dimension ratio of greater than 5.
    If flat and elongated particles are contributing to a low VMA in a mixture, the percentage of particles that exceed a 3:1 ratio should be determined..

  • What is the Superpave method of mix design?

    The Superpave mix design system evaluates the volumetric properties of the compacted samples.
    These properties include air voids (Va), voids in mineral aggregate (VMA) and voids filled with asphalt binder (VFA), and dust to binder ratio..

  • Marshall.
    Compared to the Marshall design method, Superpave integrates material selection and mix design and uses an entirely different type of compaction.
  • N-initial (Nini ) = the initial number of gyrations, a relatively low number of gyrations based on the design traffic volume, and used to analyze the early densification properties of the Superpave mix during construction.
  • Superpave Mix Design Analysis
    Each trial mix sample is compacted in the Superpave gyratory compactor using three different gyration cycles based on 20-year traffic loading estimates in millions of ESALs from AASHTO R 35: Ninitial: This number of gyrations measures compactibility of the mix during construction.
Superpave represents an improved system for specifying asphalt binders and mineral aggregates, developing asphalt mixture design, and analyzing and establishing 

What is a Superpave System?

It is a multi-faceted system with a tried approach to designing asphalt mixtures based on desired performance

Using the Superpave system, materials and mixes can be designed to reliably perform under any conditions of load and environment

What is the performance grading system in Superpave asphalt binders?

It evaluates the binders' abilities in resisting rutting, fatigue and low temperature cracking based on their rheological properties at the anticipated pavement temperatures

The Asphalt binder grading system in Superpave is called the performance grading (PG) system

All PG Binders are characterized based upon fundamental engineering parameters

What is the Superpave mix design method?

The Superpave mix design method was designed to replace the Hveem and Marshall methods

The volumetric analysis common to the Hveem and Marshall methods provides the basis for the Superpave mix design method

The Superpave system ties asphalt binder and aggregate selection into the mix design process, and considers traffic and climate as well


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