With the wide application of road studs in domestic high-grade highways and municipal roads, more attention has been paid to the quality and service life of road studs. However, in the actual application process, the phenomenon of road stud damage and service life reduction often caused by installation problems occurs frequently. Based on years of construction experience, the author summarizes the problems that often occur during the installation of road studs, and proposes a reasonable installation method, hoping to discuss with colleagues in the transportation industry.
The following are the issues that need to be paid attention to during the installation of road studs:
1. Install on the marking line. The marking line is also a resin material, which itself is attached to the ground, and its connection force with the ground has a certain limit. If the road stud is installed on the marking line, the impact force of the road stud is completely transferred to the marking line, so that the road stud is easy to be impacted off, and the marking line will also be glued off.
2. The road stud installation position is not flat. The direct consequence of this is that the force of the spike is uneven, and the pressure on the spike is almost concentrated on the convex and concave parts. Road studs are easy to break if encountered with large tonnage vehicles.
3. The road stud installation location is not clean. The firmness of the road studs depends on the close combination of the road studs, glue and the ground. If the installation location is not clean, the dust in the middle will absorb most of the adhesive force of the glue, resulting in the road stud not being firmly bonded, and it will easily fall off when it is impacted by external forces.
4. The amount of glue is not enough or the amount is too much. Insufficient dosage will reduce the firmness of the road stud bonding and reduce its service life; if the dosage is too much, the excess glue will seep out from around the road stud, and it is easy to wipe on the reflective sheet of the road stud, affecting its reflective brightness.
5. The glue is not applied evenly. When installing road studs, the glue should not only be used in an appropriate amount, but also applied evenly, so as to ensure that all parts of the road studs are evenly stressed and avoid being crushed due to uneven stress.
6. The ambient temperature is not enough when the epoxy resin glue is prepared. Epoxy resin glue is a two-component glue. The glue and curing agent must be proportioned according to a certain ratio, and can only be effective after stirring evenly. However, since the epoxy resin glue condenses more strongly in low temperature weather in winter, it is not easy to stir evenly, so it must be heated before use to soften the glue before use.
7. The method of pinching the spikes is unscientific. When holding the road studs, be sure to hold the two sides without the reflector, so as to avoid the glue sticking to the reflector and affecting the reflective brightness of the reflector.
8. The installation holes of German road studs are shallow and thin. This is mainly for cast aluminum spikes. Cast aluminum spikes have better impact resistance, compression resistance and longer service life because they are partially deep into the ground. However, during the installation process, if the hole is too shallow or too thin, the bottom surface of the road stud cannot fully contact the ground, which affects the firmness of the bonding.
9. The glue does not have enough time to cure after installation. After the road studs are installed, the glue needs a period of time to solidify to connect the road studs to the ground tightly. During this time, the author recommends 4 hours. However, in the actual process, many people removed the installation isolation facilities within two hours after installation; in this case, if the road studs are impacted and rolled by vehicles, the light spikes will be deformed, and the heavy spikes will fall off.