Abstract
Steel slag permeable asphalt concrete was prepared with steel slag as aggregate and mineral powder as filler. The percentage passing rate of each grade of aggregate was calculated through the screening results of each grade of aggregate. The mixing ratio of five groups of raw materials was pre-designed according to the specifications of highway asphalt pavement, and the data with 2.36mm and 4.75mm as the key sieve holes were verified by mathematical regression method. Based on this, by testing the road performance of the standard Marshall specimens produced by the pre-designed five-component ratio, the optimal ratio of asphalt mixture with a voidage of 20.5% is obtained: w (13.2-9.5mm) : w (9.5-4.75mm) : w (4.75-2.36mm) : w (2.36-0mm) : w (ore powder)=45:41:5:6:3. The Marshall stability of steel slag permeable asphalt mixture prepared according to this ratio is 6.07KN, 5.65KN by soaking Marshall, 93.08% by residual stability, 2698 times/mm by dynamic stability, and 45.3 by seepage coefficient. All technical indicators meet the requirements of asphalt pavement construction technical specificatio.
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