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近些年来，随着我国道路交通事业的高速发展，重交通和重载现象日趋严重，沥青路面的各种表面功能都衰减很快，直接影响到汽车的行驶安全和舒适性。为此，如何改善已建高等级公路的使用功能是公路养护的普遍关注的问题之一。采用薄层沥青混合料罩面是一种延长路面寿命、改善行驶质量、校正表面缺陷、提高安全特性(包括提高抗滑与排水)、减小噪音、增加路面强度等路面功能的有效措施。目前这项技术已在国内外得到了较为广泛的关注。“,”In recent years, with the rapid development of China's road transport business, heavy traffic and heavy serious, and a variety of surface features of asphalt pavement are quickly decay, with a direct impact on the safety and comfort of the car. To do this, how to improve the highway has been built using the function is one of the issues of common concern road maintenance. Using thin asphalt overlay is a prolong pavement life, improved ride quality, correcting surface defects and improve security features (including improved skid and drainage), reduced noise, increased effective measures road pavement strength functions. This technology is now at home and abroad has been more attention.