The research of slurry seal coat of emulsified asphalt is made in maintenance engineering on 309 highway from some aspects such as choice of materials ,mixture design, construction techniques etc.

• 从原材料选择、混合料设计、施工工艺等方面对309国道潍坊段养护工程中采用的乳化沥青稀浆封层技术进行了研究,并通过实践得出了稀浆封层混合料的配比设计、施工等方面的注意要点。