This article depends on the project of Yunnan Education Committee science and technology, which name was“the new technology research of Expressway Asphalt Pavement Seal in Yunnan”, and begin its systematic research on the maintenance technologies of asphalt pavement by paved thin overlay of the warm mix asphalt of SMA.

Thanks to resolving difficult compact of super-thinned paving with hot-mix asphalt mixture,its successful application in municipal road and expressway has remarkable economic,social and environmental benefits.