近年来,美国和日本进行了系列的利用泡沫沥青筑路的试验研究工作。所谓泡沫沥青,即是将一定温度及压力的沥青和蒸气通过泡沫发生装置后,使沥青呈泡沫状。沥青发泡后,容积增大,粘度变小(如沥青的原始针入度为85—100,发泡后可达到300),低温时的粘附性加大,而沥青的物理化学性质不变。实践证明,用泡沫沥青在拌合机内拌制混合料时,泡沫沥青和矿料的温度均可降低(前者可为110℃;后者 In recent years, the United States and Japan conducted a series of pilot studies using foam asphalt roads. The so-called foam asphalt, that is, a certain temperature and pressure of asphalt and steam through the foam generating device, the foam was foam. Asphaltic foam, the volume increases, the viscosity becomes smaller (such as the original penetration of asphalt 85-100, after foaming can reach 300), adhesion increased at low temperatures, while the physical and chemical properties of asphalt unchanged . Practice has proved that the foam asphalt mixing in the mixer when the mixture, the foam asphalt and mineral materials can be reduced in temperature (the former can be 110 ℃; the latter