The asphalt pavement report number is divided into seven labels according to asphalt penetration, namely 160, 130, 1 10, 90, 70, 50 and 30. According to the relevant information, asphalt penetration: mainly indicates the consistency of asphalt, and is also used to name the label of asphalt. Measured by penetrometer in the laboratory, that is, the sample is put into the standard test cup, and the standard test needle with the weight of100g freely falls into the asphalt sample within 5 seconds, which is calculated as 0.0 1 mm, so the asphalt pavement report number is used.