Recently, polymers are useful materials for modification of bitumen to improve their technical properties, especially rheological ones. The literature data have been shown that, in same cases, increase of adhesion to aggregate has been additionally observed. However some authors have been indicated that an the effect of polymer modification on adhesion has not been significant.
In this paper the influence of short and long term ageing processes on polymer dispersion in polymer modified bitumen was analyzed. The bitumen was modified by various amount of SBS elastomers. Rheological and technical properties were investigated. Microstructural changes of polymer dispersion were tested using a fluorescent microscope.
The influence of two types of ageing on changes of polymer dispersion distribution was characterized. Potential effect of polymer dispersion on adhesion was also discussed.

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