Improved workability and compactability in asphalt construction
Better workability in asphalt road construction
aspha-min® is a finely granulated, synthetic zeolite-based additive designed for the production of warm mix asphalt (WMA) and low-viscosity hot mix asphalt (HMA). The additive functions through a physical mechanism: the release of chemically bound (crystallised) water generates micro-pores within the binder, producing a controlled foaming effect (indirect foaming). This temporarily increases the effective binder volume, reduces binder viscosity, and thereby improves the workability and compactability of the asphalt mixture.
The use of aspha-min® enables a reduction in asphalt mixing and paving temperatures of approximately 30 K. Intentional temperature reduction at the asphalt plant lowers energy demand and helps protect workers, the environment, and equipment. Reduced temperatures also allow time-critical construction projects to be completed and opened to traffic more rapidly.
When used in conventional hot mix asphalt, aspha-min® significantly enhances workability and compactability, particularly when working with stiff or modified binders, under adverse weather or haulage conditions, and during manual paving operations.
The proven solution for warm mix asphalt
The application of aspha-min® is among the earliest and most well-established WMA technologies. It originated in the mid-1990s from research and development activities conducted by Mitteldeutsche Hartstein-Industrie AG (MHI) in Hanau, Germany — a family owned company with decades of experience in aggregate production, asphalt manufacturing, and asphalt road construction.
These developments have received numerous international awards, including the Prix de l’Innovation Vinci (2001), Certificat Innovation Autoroutière (2005), Prix Innovation de la FNTP (2005), and Grand Prix de l’Innovation du SMCL (2005) in France, as well as the Hazard Protection Prize (2002) in Germany.
Since 1997, an extensive track record of reference projects across Europe and overseas has demonstrated and confirmed the long-term performance and sustainability of warm mix asphalt produced with aspha-min®.
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