35/50 WMA

Basic information

Recommended process temperatures

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WMA road bitumen is an innovative product on the Polish road construction market. The search for optimum solutions, a number of tests carried out and the commitment of our employees have resulted in the development of a product with special parameters and unique properties, thus setting a new quality in the production and use of bitumen.

The above-standard properties of WMA bitumen make it possible to produce mineral and bitumen mixtures that require improved workability due to the production method, climatic conditions or composition. Mineral and bitumen mixtures with WMA are particularly recommended for use when working in areas that are difficult to access, such as tunnels and underground car parks.

The use of WMA road bitumen is recommended for the production of the following mineral and bitumen mixtures:

  • mixtures produced and built in “hot-mix”
  • mixtures produced “hot-mix” and built in difficult climatic conditions or transported over long distances
  • mixtures with granulated bitumen derived from recycled bituminous surfaces
Bitumen 35/50 WMA
Handling of samples in the laboratory
The handling of the samples “heating time and temperature) is specified in standard EN 12594. After heating the samples in the containers, they should be homogenised by stirring. Multiple heating of the samples should be avoided
Compaction temperature of samples for MMA “warm-mix” 130 – 135°C *
Compaction temperature of samples for MMA “hot-mix” 140 – 145°C
„Warm-mix” MMA industrial production
Recommended temperatures on WMB
Pumping temperature 155 – 180°C
The production temperature of the mineral and bitumen mixture 140 – 160°C **
Recommended built in temperatures of MMA “warm-mix”
Optimum compaction start temperatures min. 130°C **
Industrial production of “hot-mix” MMA.

MMA built in difficult climatic conditions or transported over long distances. Use of bitumen granules

Pumping temperature 170 – 180°C
The production temperature of the mineral and bitumen mixture 160 – 170°C
Recommended built in temperatures of MMA “hot-mix”
Optimum compaction start temperatures 145 – 155°C ***

 

* depending on the planned compaction temperature at the construction site

** the degree of temperature reduction should be adapted to the atmospheric conditions (see below – recommendations for reducing process temperatures when using “warm-mix” technology)

*** depending on the type of mixture, layer thickness and climatic conditions

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