New regulations on bitumen fumes and aerosols, along with increasing traffic and climatic loads on highways, demand innovative construction materials. In this investigation, a novel isocyanate-based bitumen additive was used to pave 0.5 km of an asphalt binder layer with 50% reclaimed asphalt at 20-30°C below hot mix asphalt (HMA) temperatures, in Germany. During construction, bitumen fumes and aerosols were measured for both reference and modified asphalt mixtures. The reference mixture was paved using a similar mixture but with standard polymer modified bitumen, at standard HMA temperatures. For the investigation, a bitumen 70/100 was modified with 2.0% by wt with this novel isocyanate-based additive in an in-line procedure directly at an asphalt mixing plant without affecting production times. Bitumen and asphalt tests were conducted in the laboratory, on asphalt gathered from the construction site. Due to the temperature reduction, the emissions could be considerably reduced, while maintaining comparable asphalt performance..

关于沥青烟尘和气溶胶的新法规，以及高速公路上日益增加的交通和气候负荷，都需要创新的建筑材料。在这项研究中，在德国，一种新型的基于异氰酸酯的沥青添加剂被用于在20-30°C低于热混合沥青（HMA）温度的情况下铺设0.5 km的沥青粘合剂层，其中含有50％的再生沥青。在施工过程中，测量了参比沥青和改性沥青混合物的沥青烟雾和气溶胶。在标准HMA温度下，使用相似的混合物但使用标准聚合物改性的沥青铺筑参考混合物。为了进行研究，直接在沥青混合料厂中以在线程序用这种新型的基于异氰酸酯的添加剂对2.0重量％的沥青70/100进行了改性，而不会影响生产时间。在实验室对从施工现场收集的沥青进行了沥青和沥青测试。由于温度降低，排放量可以大大减少，同时保持可比的沥青性能。