The main reason for the damage is that the strength of the materials used in the body reflective road stud is not enough. In the process of practical use, the road stud will be subjected to static pressure load and impact load. The static pressure load is mainly formed by the tire pressure on the road studs when the vehicle is stationary; the impact load is mainly generated when the tire is running over the road studs.
The main way to improve the static pressure strength of the reflective road marker body is to improve the strength of the material of the reflective road stud body. At present, the AL type road stud sold in the domestic market are divided into metal material road stud (such as aluminum road stud), engineering plastic material road stud (such as polycarbonate, acrylic acid and other materials of engineering plastic road stud) and mixed material road stud (such as engineering plastic shell + quartz sand filled Road stud). Among them, the compressive strength of metal material is the highest, followed by engineering plastic material and mixed material.
The improvement of the impact strength of the reflective road stud body can also be achieved by improving the strength of the reflective road marker body material. In terms of materials, the impact strength of metal materials is the highest, followed by engineering plastics materials, while the impact strength of mixed materials is the lowest (due to the different deformation coefficients of different materials).
The reason for the invalid of the reflective road stud body to the ground rubber and the road surface is that the transverse shear force parallel to the road surface is greater than the joint force between the road surface and the road surface.. Therefore, it is particularly important to select different types of primer for different pavement. For asphalt pavement, the bonding effect of asphalt adhesive is the best, and for cement pavement, the bonding effect of epoxy resin adhesive is the best.
In addition, the effect of acting on the lateral shear force of the reflective road stud or strengthening the bonding strength between the road stud and the road surface can be achieved by optimizing the shape of the road stud.For example, the combination strength of the road stud and the road surface can be improved by use of the road stud with feet (the foot of the road stud is vertically inserted into the ground during installation); It can reduce the angle between the reflecting surface of the road stud and the road surface to reduce the transverse shear force of the reflective road stud. It can be seen from the stress analysis of the road stud body that the smaller the angle is, the smaller the transverse shear force the stud body bears, and the greater the pressure in the vertical direction.
