1. Chapter 9

2. Bituminous material  Road oil bitumen  Mineral material Chapter 9 §9.4 Component Material of Bituminous Mixture

3. Road oil bitumen Heavy pavement petroleum bitumen Medium, light pavement petroleum bitumen petroleum bitumen Bituminous material Road oil bitumen Classification

4.  Tab:AH-50 、 AH-70 、 AH-90 、 AH-110 、 AH-130(Tab.9.4.1)  Applications: Highway, road surface of arterial highway, road surface of air port and road surface of important city road. Bituminous material road oil bitumen Heavy pavement petroleum bitumen

5. Tab.9.4.1 Technical Standard of Heavy Pavement Bitumen Test items AH-130AH-110AH-90AH-70AH-50 Penetration degree 25 ℃,100g,5s/0.1mm 120-140100-12080-10060-8040-60 Prolongation(15 ℃,5cm/min)/c m 10010010010080 Softening point ℃ 40-5041-5142-5244-5445-55 Flashing point (COC)/ ℃ 230 Film oven heating test 163 ℃,5h Quality loss % ≯ 1.31.21.00.80.6 Penetration degree ratio % ≮ 4548505558 Prolongation 25 ℃ /cm ≮ 7575755040

6. Medium, Light Pavement Petroleum Bitumen  Tab: A-60 、 A-100 、 A-140 、 AH-180 、 AH-200 (Tab.9.4.1)  Applications: Ordinary pavement, workshop ground and so on. Bituminous material Road oil bitumen

7. Tab.9.4.2 Technical Standard of Medium,Light Pavement Petroleum Bitumen Test itemsAH-200AH-180AH-140 AH-100 甲 AH-60 甲 Penetration degree (25 ℃,100g,5s)/0.1mm 201-3001610-200121-16091-12051-80 Prolongation (15 ℃,5cm/min)/cm -100 9070 Softening point ℃ 30-4535-4538-4842-5245-55 Flashing point (COC)/ ℃ 180200230 Evaporation loss % ≯ 1 Penetration degree ratio after evaporation % ≮ 5060 6570 Solubility % ≮ 99

8. It is determined by traffic, climates(Tab.9.4.3), pavement structure, types of mixture and construction condition. Climate subareaBituminous tab Cold area A—140 、 A—100 、 AH130 、 AH110 、 AH90 Soft area A—60 、 A—100 、 AH90 、 AH70 Quite hot area A—60 、 AH50 、 AH70 Tab.9.4.3Choice of Bituminous Concrete Tab in Different Climates Selection

9. Mineral Material Mineral Material Slag Fine Aggregate Coarse Aggregate Mineral material Classification It must ensure that bituminous mixture has enough density and larger angle of internal friction. Coarse aggregate, fine aggregate and slag are kinds of general mineral materials.

10.  Gravel  Strength: It can be divided into four grades according to saturation compression strength and abrasion(Tab.9.4.1).  Shape: close to cubes, coarse surface, needlelike aggregate ＜ 15%, water content ＜ 3%, mud content ＜ 1%  Cohesion with bitumen Cohesion with bitumen ≮ grade 3, otherwise antistripping agent is required. Mineral Material Mineral Material Coarse Aggregate

11. GradeCharacteristics Applications in bituminous concrete First grade The strongest rock Anti-slide cover coat of primitive bituminous pavement Second grade Strong rockCover coat Third grade Less stronger rock Cover coat, bottom coat, adjoining coat Fourth grade Softer rock— Tab.9.4.3 Strength grades of Coarse Aggregate Coarse Aggregate

12.  Fine aggregate: natural sand, stone chips Requirements:Hard, clean, dry, non-efflorescent, spotless  Slag: Alkalinous rock (limestone, mirror stone, marble etc.), fine stone powder, Alkalinous cinder, cement, fly ash etc.) Requirements: Dry, clean, loose, fine, strong cohesion with bitumen, hydrophilic index ＜ 1.00) Mineral Material Mineral Material