Pervious asphalt mixture is selected according to the conditions of asphalt gravel in urban road engineering.
I. Asphalt varieties
1. When the minimum monthly average temperature in our country is lower than -10°C, it is divided into cold regions such as Heilongjiang, Jilin, Gansu, Xinjiang, Qinghai, Ningxia, Tibet, and Inner Mongolia, Shanxi, Hebei, Shaanxi, and Liaoning. area. Should choose the oil pitch AH-90, AH-110, AH-130, AH-100, AH140 and other types.
2. The minimum monthly average temperature in China is between -10~0°C, such as Beijing, Tianjin, Shandong and other provinces, urban areas and Liaoning, Shanxi, Hebei, Shaanxi, Gansu, Henan, Jiangsu, Anhui, Sichuan and other provinces. In some areas. Should choose the oil pitch AH-90, AH-110, A-100, A-140 and other types.
3. When the minimum monthly average temperature in China is above 0°C, such as Shanghai, Guangdong, Guangxi, Hainan, Hunan, Hubei, Fujian, Zhejiang, Jiangxi, Yunnan, Guangzhou, Chongqing, Taiwan and other provinces, cities, and Henan, Jiangsu In some areas of Anhui, Shaanxi, Sichuan and other provinces and regions, the petroleum bitumen AH-50, AH-70, AH-90, A-100, A-60, etc. should be selected.
II. The quality requirements for different grades of petroleum asphalt are shown in the following table.
Petroleum asphalt quality requirements table 1
Labeling Pilot projects | AH-130 | AH-110 | AH-90 | AH-70 | |
Penetration (25°C, 100g, 5s) (0.1mm) | 120~140 | 100~120 | 80~100 | 60~80 | |
Ductility (25°C 5cm/min, 15°C) not less than (cm) | 100 | 100 | 100 | 100 | |
Softening Point (Ring and Ball Method) (°C) | 40~50 | 41~51 | 42~52 | 44~54 | |
Flash point (coc) is not less than (°C) | 230 | ||||
Wax content (distillation method) is not more than (%) | 3 | ||||
Density (15°C)(g/cm3) | Recorded | ||||
Solubility (not less than) (%) | 99.0 | ||||
Film heating test 163 °C 5h | Loss of quality not more than (%) | 1.3 | 1.2 | 1.0 | 0.8 |
Penetration ratio is not less than (%) | 45 | 48 | 50 | 55 | |
Ductility (25°C) not less than (cm) | 75 | 75 | 75 | 50 | |
Ductility (15°C)(cm) | Recorded | ||||
Petroleum asphalt quality requirements Table 2
Labeling Pilot projects | A—140 | A-100 A | A—1002 | A—60 | |
Penetration (25°C, 100g, 5s) (0.1mm) | 120~160 | 90~120 | 80~120 | 50~80 | |
Ductility (25°C 5cm/min) not less than (cm) | 100 | 90 | 60 | 70 | |
Softening Point (Ring and Ball Method) (°C) | 38~48 | 42~52 | 42~52 | 45~55 | |
Flash point (coc) is not less than (°C) | 230 | 230 | 230 | 230 | |
Solubility (trichloroethylene) not less than (%) | 99.0 | 99.0 | 99.0 | 99.0 | |
Evaporation loss Loss test 163°C5h | Loss of quality not more than (%) | 1 | 1 | 1 | 1 |
Penetration ratio is not less than (%) | 60 | 65 | 65 | 70 | |
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