Problems and solutions of road line marking--crack

On the highway construction, road marking, we often encounter the some kind of problems. I have accumulated some experienceam through learning and practice in the long-term highway construction, the following are several common problems and solutions on the hot-melt marking construction i will share with you.

cracks of road line marking

Due to the aging S-line cracks. Surface of the painting material degradation and natural weathering, so that marking cracks, aging marking paint cracks but also because long-term exposure on the road to withstand sun and rain, spring, summer autumn and winter, temperature difference between day and night and seasonal temperature changes, subjected to ultraviolet light role, subject to cyclical expansion and contraction arising. Cracks generated due to aging can only start from the selection of suitable painting to prevent premature aging painting, in the standard line of construction, strict control of temperature, to ensure the quality of pre-construction surface treatment to prevent foaming.

Microporous and bubbling Because of the hole in the air, water or dry the next Paint, in the painting under high temperature caused by expansion or vaporization. Expanding gas bubble is caused by painting from the top, porous painting is the expansion of gases, leaving behind holes pierced, so that painting the more common defects. Wet pavement porous and increase the chances of blistering, it is because the road is full of water or moisture in porous, high-temperature painting so that the water left in the micro-gasification and expansion of micro-bubbles formed, the next Paint contains some of low boiling point components, easy to dry, when the residue in the cavity was dry in the next Paint when the temperature painting, the play to the rapid gasification of the material expansion, the formation of micro-bubbles under the paint by. Microporous, marking not only affect the appearance of blistering, but also reduced the painting and the surface area of reality and seriously affect the paint adhesion and longevity. Therefore, opt for a variety of good fluidity of paint. To ensure dry and full sunshine after the rain has to go through before construction. Choose dry the next Paint fast, strictly control the temperature should pay attention to the construction with the ambient temperature.