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Written by Szabolcs Biro   

Asphalt modification usually involves the dispersion of different polymers within the neat asphalt (bitumen). ECOPATH engineering places a high importance on the identification of compatible asphalt-polymer blends to ensure that the optimum properties are achieved at the most competitive price.

Examples of this innovation have included: the addition of saturated polymers to paraffin deficient asphalts to produce a gelling asphalt. Similarly, for asphalts deficient due to the viscosity of the maltenes, ECOPATH has improved these binders by dispersing unsaturated polymers throught out the binder.

If asphalt properties are deficient due to the molecular weight of the asphaltenes, ECOPATH has derived solutions involving insoluble polymers for paving materials.

As is often the case, these issues tend to arise simultaneously; therefore, ECOPATH engineers have developed specific formulations to combat these issues by incorporating various polymers at the required doses and using the appropriate production processes.


State agencies have recognized the benefits of using modified asphalts, specifically because pavements made with these modifiers result in pavements which require significantly less maintenance and upkeep. From a performance standpoint, the benefits of using modified asphalt are summarized below:

• Obtain more elastic blends at low service temperatures and reduce cracking
• Reduce rutting
• Reduce viscosity at laydown temperatures
• Increase the stability and the strength of mixtures
• Improve the abrasion resistance of blends
• Improve fatigue resistance of blends
• Increase oxidation and aging resistance
• Reduce structural thickness of pavements
• Reduce lifecycle costs of pavements.

 

Last Updated ( Tuesday, 30 June 2009 18:31 )