Road cleaning machine, blowing machine strictly control the dosage of tar oil and evenness in previous daub oil bitumen coating process para, workers only judging by their own subjective experience of asphalt oil daub a quantity to whether meet the requirements, are often difficult to grasp the dosage and uniformity, high pressure water in addition to the line of each of the daub after each position clear line, the line between the dosage of great deviation and evenness. So we conducted the test.

1. After each cylinder in saturated oil absorbing asphalt, with 1.5 m long lines, namely each marking points and four blocks, at the early stage of the clean completely clean, by bitumen coating oil workers to control the dosage of oil bitumen coating process.

2. After repeated experiments, the results show that the segmentation daub, simple to daub evenly and asphalt oil amount reaches the goal of 0.25 kg / ㎡. Saves cost reduce material waste, daub evenly daub another quality goals.