沥青混合料再生利用配合比设计技术研究

Research on Technology of the Design of the Regeneration and Utilization of Asphalt Mixture

针对沥青混合料再生利用配合比设计关键技术,对回收旧料的性能进行分析,并确定回收旧料中的沥青含量和矿料级配;采用美国沥青协会的方法来估算再生沥青混合料中的沥青用量,将其作为选择旧料掺配比例时的计算参数使用,并确定回收旧料的掺量,利用马歇尔法进行配合比设计,最终确定最佳级配和沥青用量,并对美国沥青协会用来估算再生沥青混合料中沥青用量的计算公式进行修正,经系数修正后的计算公式为:P=0.025 a+0.03 b+kc+f。

The key technology for the design of the mix proportion design of asphalt mixture,analysis of the performance of recycling old material,and determine the content of asphalt and mineral aggregate gradation in the recycling of old materials.The American asphalt association method was used to estimate the amount of asphalt in the recycled asphalt mixture,which was used as the calculation parameters of the old material when blending ratio.Determine the content of the old material,using Marshall method to carry out the mix propor-tion design,ultimately determine the optimum gradation and asphalt content.The American asphalt associa-tion was used to estimate the amount of asphalt mixture used in the calculation of the formula for the calcula-tion of asphalt mixture,the formula was amended by the coefficient:P =0.025 a +0.03 b +kc +f.