随着我国公路沥青路面大修期的到来,越来越多的废旧沥青混合料被抛弃,不仅占用了大量的土地,而且造成了严重的环境污染。近几年,国家不断加大公路建设的投资力度,新工程对沥青、砂石等原材料的需求量越来越大,今后沥青路面的维修量也会随之持续增加。目前国内沥青主要依赖进口,沥青用量的大幅度增加带来的是巨额经济支出;与此同时,砂石开采量的增加带来 With the advent of highway asphalt pavement overhaul in our country, more and more waste asphalt mixtures are abandoned, which not only occupy a large amount of land, but also cause serious environmental pollution. In recent years, the state has continuously increased the investment in highway construction. The demand for raw materials such as asphalt and gravel in the new construction project has been increasing. In the future, the maintenance of asphalt pavement will also continue to increase. At present, the domestic bitumen is mainly imported. The substantial increase in the amount of bitumen results in a huge amount of economic expenditure. At the same time, the increase in the amount of gravel mining brings