Graduation of Heilongjiang adjusting type asphalt concrete

The invention discloses graduation of AC-20 Heilongjiang adjusting type asphalt concrete. The graduation range is as follows: the screen size is 26.5mm and the aggregate passing rate is 100%; the screen size is 19mm and the aggregate passing rate is 92-100%; the screen size is 16mm and the aggregate passing rate is 72-92%; the screen size is 13.2mm and the aggregate passing rate is 58-80%; the screen size is 9.5mm and the aggregate passing rate is 44-62%; the screen size is 4.75mm and the aggregate passing rate is 34-46%; the screen size is 2.36mm and the aggregate passing rate is 27-40%; the screen size is 1.18mm and the aggregate passing rate is 20-32%; the screen size is 0.6mm and the aggregate passing rate is 15-25%; the screen size is 0.3mm and the aggregate passing rate is 10-18%; the screen size is 0.15mm and the aggregate passing rate is 6-14%; and the screen size is 0.075mm and the aggregate passing rate is 4-10%. The grading curve designed according to the degradation range can be used for effective