SBS polymer-modified asphalt used in paving applications including hot and cold mix

摘要

Polymer-modified asphalt emulsions (PMAE) have a variety of sustainable applications in asphalt pavement and road rehabilitation. Styrene-Butadiene-Styrene (SBS) elastomers have been in use as modifiers of asphalt since several decades. Once the asphalt is modified with elastomer, it can be emulsified to get synergism of its properties. This work presents two applications of SBS polymer-modified asphalt used in hot mix asphalt (HMA) and cold mix asphalt (CMA) designs. In the case of first application, the polymer-modified asphalt (PMA) improves the fatigue modulus compared to the conventional aspha in the second application, the results show the possibility of combining recycled asphalt pavement (RAP) in the cold mix formulation by partially substituting the stone aggregate used in the mix while keeping the Marshall stability. In both practices, mechanical data show acceptable properties for road construction and rehabilitation.