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广西有大量的旧沥青路面每年都要安排大、中修和路面养护，如何将大量的旧沥青路面材料重复利用，并保证工程质量、降低成本和加速沥青路面的新改建进度，柳州公路管理局承担了“旧沥青路面再生利用”这一科研项目，在项目研究过程中，研制了ＰＦ０５０４型粉碎机，采用了中裂型“阴乳”作新的粘合料和旧油面的挖起和破碎加工方法，进行了旧路面含油沥青及其技术指标的测定、旧沥青路面再生利用掺配新沥青以及新碎石的配合比设计、表处。通过研究和试验，旧沥青路面再生利用可以节省投资，加快老旧超龄沥青路面的养护。
Guangxi has a large number of old asphalt pavement arrangements every year, maintenance and pavement maintenance, how to recycle a large number of old asphalt pavement materials and ensure the quality of the project, reduce costs and speed up the progress of the new reconstruction of asphalt pavement, Liuzhou Highway Administration Undertake the “old asphalt pavement recycling” of this research project, in the project research process, the development of the PF0504-type grinder, the use of the cracking type “Yin milk” as a new binder and the old oil surface dug and Crushing processing methods, the determination of the old pavement oil-containing asphalt and its technical indicators, the reuse of old asphalt pavement mix with new asphalt and the new gravel mix design, table office. Through research and experimentation, the recycling of old asphalt pavement can save investment and speed up the maintenance of old over-aged asphalt pavement.