news

The quality of road glass microbeads directly determines the reflective effect and service life of road markings. Many traffic engineering and road construction enterprises often face problems such as insufficient reflection, short service life and easy falling off of microbeads due to improper selection. Mastering scientific selection standards is the key to ensuring road marking quality and traffic safety.

First, judge by the refractive index, the core indicator of glass microbeads. The refractive index directly affects the retroreflective efficiency of microbeads. At present, mainstream road glass microbeads on the market are divided into standard refractive index (1.5 RI) and high refractive index types. The 1.5 RI microbeads conform to international road marking standards, with stable performance and high cost performance, suitable for most urban roads and ordinary highways. High refractive index microbeads have stronger light-gathering and reflection ability, and are more suitable for high-grade highways, mountain roads and fog-prone road sections with poor light conditions.

Second, select according to particle size and uniformity. Road glass microbeads have strict particle size classification standards. Microbeads with uniform particle size can be evenly dispersed in the marking paint and firmly attached to the road surface. Too large or too small particle size will lead to uneven reflection and easy shedding. Fine-grained microbeads have high instantaneous reflectivity, while coarse-grained microbeads have stronger wear resistance. Engineering projects can match particle size specifications according to road traffic flow and usage scenarios.

Third, focus on product purity and surface treatment process. High-quality road glass microbeads have high purity, no impurities, no bubbles and cracks inside, with a complete spherical structure, which ensures stable optical performance. In addition, coated glass microbeads are better than ordinary uncoated microbeads. The special surface coating can improve the adhesion between microbeads and marking paint, prevent microbeads from falling off due to vehicle rolling, and enhance corrosion resistance and weather resistance, adapting to long-term outdoor high and low temperature changes.

Finally, verify compliance with international industry standards. Formal road glass microbeads need to meet GB/T 24717-2020 and international traffic material standards. Qualified products have stable physical and chemical properties, no environmental pollution, and can adapt to long-term outdoor harsh environment operation, which is the basic guarantee for engineering quality acceptance.