Ionomers asphalt

Figure 1. In this manner the cohesive properties of a large number of asphalt ionomers could be measured.

While it is quite possible that asphalt ionomers or suitable additives can be developed to permit good wet-strength retention, the tendency for asphalt to become brittle at temperatures below 0°C inevitably will lead to cracking thermal shrinkage exerts tensile forces well beyond the fracture limit of asphalt concretes. Thus low-temperature plasticizers, such as liquid rubbers, must be used to permit some plastic flow or stress relaxation at sub-zero temperatures (22). 

Bitumen Ionomers. Moisture-resistant asphalts (qv) have been prepared by reaction of metal oxides with acid-functionalized bitumens (75). Maleic anhydride or sulfur trioxide/trimethylamine complexes have been used successfully for introduction of acid groups into asphaltic bitumens. 

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