In the reflective thermoplastic marking construction process, road cracks, marking layer spalling is a common problem, how can we avoid, need to comprehensively consider a number of factors, and take appropriate preventive measures. Here are some specific recommendations:
First, prevent pavement cracks
1, Improve the construction quality of roadbed engineering:
Pavement cracking is one of the main causes of pavement marking reflective surface cracks. Therefore, in the process of roadbed construction, the construction quality should be strictly controlled to ensure that the cracks caused by expansion or closure of roadbed materials are effectively controlled. For the newly paved concrete pavement, should ensure that it is in a stable state for marking construction, generally recommended that the road surface to maintain more than 2 weeks before marking operations.
2, choose the right construction season:
winter construction, the coating cold contraction may cause thermal stress, resulting in cracks. Therefore, should try to avoid construction in the cold winter, or take appropriate measures to reduce the impact of cold on the coating.
3, reasonable selection of hot melt marking coating:
According to different seasons and road conditions, select the appropriate hot melt marking coating and its ratio. For example, in the summer high temperature conditions, should choose the heat resistance of the coating; in the winter cold conditions, should choose the cold resistance of the coating.
Second, the prevention of marking layer peeling
1, to ensure that the road surface is clean and dry:
Before construction, the road surface should be thoroughly cleaned to ensure that the road surface is free of oil, water and other impurities. At the same time, the road surface is dry and then construction, to avoid the road surface is wet, resulting in marking layer and road surface bonding is not firm.
2, the correct use of undercoating agent:
The undercoating agent is an important material to enhance the bond between the marking layer and the road surface. In the use of undercoating agent, should ensure that it is coated evenly, no leakage, and in the undercoating agent dry immediately after the marking construction, to avoid prolonged exposure to lead to dust contamination.
3, control the construction temperature and environmental conditions:
Construction, should ensure that the paint melting temperature is appropriate, to avoid too high a temperature leading to paint scorching or too low a temperature affecting the bonding force. At the same time, pay attention to the impact of environmental temperature on the construction quality, try to construction in the appropriate temperature range.
4, improve the level of construction technology:
Construction personnel should have a certain level of technology and experience, and be able to master the use of road marking machine and process requirements. In the construction process, should be strictly in accordance with the operating procedures for construction, to ensure that the quality of the marking layer meets the standard requirements.
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