Abstract
By controlling the variability of Reclaimed Asphalt Pavement (RAP) and achieving the goal of high content, it is proposed that the milling speed of RAP should be controlled at 5 ∼ 7m / min, the moisture content should not be greater than 2%, and there should be at least two levels of pretreatment technology. The maximum RAP content of AC-25 hot recycling is 50% according to the grading calculation curve under the condition that the current standard grading range and powder binder ratio are not greater than 1.3. At the same time, according to the grading calculation of the project, the empirical formula of coarse and fine aggregate mix to realize the balanced design of utilization and economy is put forward.
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