ＳＭＡ是从国外引入的一种新型路面沥青混合料结构，一般来说，ＳＭＡ结构的使用应结合各个国家各自的特点。我国的气候条件比较恶劣，各个地区之间的差别也比较大，加之施工机械、材料、经济条件的限制，完全照搬国外的经验，显然是行不通的，这一点在国内有些地区的试验... SMA is a new pavement asphalt mixture introduced from abroad. Generally speaking, the SMA structure should be combined with the respective characteristics of each country. The climatic conditions in our country are rather harsh and the differences among various regions are relatively large. In addition to the restrictions on construction machinery, materials and economic conditions, it is obviously not feasible to completely copy the experience of other countries. This is a test in some areas in China. .