The problem of frost cracking in traffic markings and its solutions

1. During winter construction measures, the coating shrinks when cold, causing thermal stress, which can easily cause cracks when placed in one location; The cracks caused by severe cold are related to the construction season and the characteristics of building coatings, as well as to the ground conditions. Especially for newly paved concrete floors with sensitive mortar layers or plastic film maintenance, it is very easy to cause cracks. To prevent cracks caused by severe cold, it is necessary to first select a suitable construction season and minimize the construction of road marking projects in severe winter. In addition, it is important to pay attention to the reasonable use of hot melt coatings, and choose building coatings that are consistent with each other during different seasons. The newly paved concrete floor should be maintained for at least 2 weeks. Sensitive mortar layers or maintenance plastic films on the ground should be cleaned and tidy before the construction of traffic marking projects.

2. Reflection surface cracks caused by cracks in roadbed engineering. Cracks in road markings caused by swelling or folding of raw materials in roadbed engineering, or uneven downward movement resulting in cracks. In general, it cannot be prevented, which can improve the construction quality of roadbed engineering.

3. Cracks caused by the loosening of the ground can occur in some areas with an average temperature of over 40 ℃ in summer. Under scorching sun, asphalt roads can reach temperatures of over 60 ℃, causing asphalt to loosen. However, building coatings are relatively hard, which is likely to cause soft ground cracks under the impact load of vehicle wheels. The root cause of soft ground cracks is the mismatch between the hard and soft levels of building coatings and the ground, which is caused by the impact load effect. Adjusting methods as much as possible can reduce it.

4. The surface cracks of the coating are irregular network structure cracks that appear on the surface after the construction of the coating project. These cracks are shallow in depth, but usually develop further on this basis into brittle cracks, causing the coating to be damaged. To avoid surface cracking of the coating, it is necessary to start by using epoxy resin and anti-corrosion agents with good solubility, and pay attention to controlling the construction temperature of the project.

5. Cracks appear due to embrittlement of road markings. The deterioration and natural erosion of the surface material of the coating cause cracks and embrittlement in road markings. The cracks are also caused by the long-term exposure of the marking coating to the ground, which can withstand sunlight and rain. Throughout the year, the temperature difference between day and night, as well as seasonal temperature changes, are affected by the effect of ultraviolet light, and are regularly inflated and closed. The cracks caused by embrittlement can only be avoided by selecting suitable architectural coatings to avoid premature embrittlement of the coating. At the construction site of road markings, temperature control is strictly enforced to ensure the quality of the ground solution before construction and avoid bubbles.