一、概述沧州地区地处河北省东部海河平原,地势低洼,不产砂石,60年代开始铺筑渣油路面,目前全区有黑色路面2973公里。很多路面的使用寿命已经达到或超过预期的要求,急待大修或改建。如何利用现有路面材料,成为养路工程的重要课程。这对于不产砂石的平原区更有经济意义和迫切感。利用旧路面材料,可以节约能源和自然资源,降低造价,世界各国早在70年代就已开始研究,特别是工业高度发达的国家,利用旧路面材料的技术发展更加迅速。据统 First, an overview Cangzhou area is located in the eastern part of Haihe River Plain in Hebei Province, low-lying, no gravel, the 60s paving the residue pavement, the region has 2973 km of black pavement. The service life of many pavement has reached or exceeded the expected requirements, urgent repair or alteration. How to make use of existing pavement materials has become an important course of road maintenance project. This is more economical and urgent for plain areas that do not produce gravel. The use of old pavement materials can save energy and natural resources and reduce construction costs. Various countries in the world started to study as early as the 1970s. Especially in the highly industrialized countries, the technology of using old pavement materials has developed rapidly. According to the system