Calculation method for asphalt and aggregate stripping rates of asphalt pavement

[0042] In step 1), coarse aggregates with a particle size of 13 mm to 19 mm and a regular shape are selected. After the coarse aggregate is coated with asphalt, soak in water and boil for 3 minutes, then take it out. Mass loss, which is used to characterize the asphalt exfoliation rate of asphalt-coated aggregates after water boiling.

[0043] The calculation process of the asphalt spalling rate of the asphalt-coated aggregate after boiling treatment is as follows:

[0044] 1) Take 5 washed and regular-shaped coarse aggregates (number 1 # ~5 # ) placed in an oven at 105°C±5°C for 1 hour, and then hung on an analytical balance with strings and weighed respectively, and the dry mass of 5 coarse aggregates was measured respectively, and weighed W 1 .

[0045] 2) Pour an appropriate amount of asphalt into a container, raise the temperature to 150°C, immerse the coarse aggregates that have been dried in step 1) and tied with thin threads into the asphalt, and keep the temperature s

[0068] Change the parameter settings of the water damage sensitivity tester in the step (1) of Example 1, set the temperature to 20°C, the pressure value to 30psi, and the number of dynamic water cycle damages to be 2000 times, and the rest of the steps are consistent with those in Example 1 . Substitute the parameters into the formula y=(a×f+b×t+c×p) / η(f is the number of dynamic water damage, t is temperature, p is pressure, a=0.004, b=0.2, c=0.2 are respectively The service life factors of dynamic water damage times, temperature and pressure, η is the real simulation degree of dynamic water damage), the real simulation degree of dynamic water damage η=95% of the water damage sensitivity tester, the temperature is 20 ℃, the pressure value is 30psi, dynamic water damage cycles of 2000 times correspond to the actual damage period of asphalt concrete pavement is 18.9 years;

[0069] Refer to Table 1 in Example 1 for the bitumen spalling rate of the boiling method, and see Table