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SMA是一种优越的热拌沥青混合料类型 ,在我国已得到广泛的应用 ,其设计方法是在参考美国设计方法基础上产生的 ,但在应用过程中仍存在不足之处。文中提出了 3点设计技巧 :规划求解设计级配曲线、综合相对密度代替毛体积相对密度 (或表观相对密度 )和变换 VMA计算公式。经过试验验证 ,这些技巧实用、可靠 ,是对SMA现有设计方法的改进和完善
SMA is a kind of superior hot mix asphalt mixture, which has been widely used in our country. Its design method is based on the reference of American design method, but there are still some shortcomings in the application process. In this paper, we propose three design techniques: planning and solving design gradation curve, synthesizing relative density instead of gross volume relative density (or apparent relative density), and transforming VMA formula. After testing, these techniques are practical and reliable, which is the improvement and perfection of SMA’s existing design methods