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Causes and treatment methods of hot melt marking
With the same hot-melt marking paint, the quality of the marking may be very different when different construction teams work on the same pavement. Some markings can be guaranteed for 12 months, and some can be guaranteed for 6 months. Some will fall off within a few days. Of course, the quality of coatings is important, and the construction process is particularly important in the construction of marking lines.
Let ’s take a look at the reasons that cause the hot melt marking to fall off: there is moisture on the pavement, the temperature difference is large, the undercoating agent is not dry, the undercoating agent is not applied, the road surface is not clean, and the old line is not firmly combined.
Reason: The road surface is treated with water: After the road surface is completely dry, it is necessary to blow dry or toast the construction road before construction. Open the large hopper before the fire. Cause: The temperature difference is too high, the road temperature will cause the marking to fall off. Preheat the construction pavement when necessary due to fire: The undercoating agent is not dry. The undercoating agent (primer) is unevenly coated, the coating is too thick, and the interval is short. If the undercoating agent is not dry, it will cause the marking to fall off. After coating, evenly dry, draw the line. Reason: No paint is applied. Treatment: Evenly apply the paint. Reason: The road is not clean. The road is dusty, sandy, oily, etc. Treatment: Cleaning and blowing off the soil and oily soil on the road. After grinding and blowing, the reason for construction is: the combination with the old line is not strong, the undercoating agent is not applied, the undercoating agent is not uniform, the undercoating agent is not dry, and the old line is aging. When the undercoat agent is dry, draw a line