Micro surface and fine surface, these two construction methods are to improve the road condition and maintain the construction technology of asphalt pavement, with the aim of increasing its service life. Although they have some similarities, there are significant differences between the two in terms of construction methods, scope of application, and material selection.
The micro-surface is a construction method for mixing cementing materials and aggregates. It uses a micro-surface paver to mix various raw materials evenly according to a certain proportion to form a flowing mixture. These raw materials include minerals, fillers, cement, polymer-modified emulsified asphalt, additives and water. The main features of the micro-surface are the ability to open up traffic quickly, as well as its high slip resistance and durability. Therefore, micro-surface is mainly used in highway, urban arterial line, airport runway and other occasions that require high friction coefficient and durability. Through the micro surface, the oil poor condition of the original pavement can be solved, the fine cracks can be filled, and the service life of the pavement can be improved.
The construction technology of layer paving is adopted at the fine surface, and there is no need to mix, nor does it need to consider the compatibility of the adhesive material and aggregate, mixing time and other issues. It is a thin layer of asphalt pavement formed by using single-particle gravel and high-density and high-adhesive adhesive materials, and then sprinkling stable materials on the gravel sealing layer with high coverage. The fine surface is mainly used for the surface wear layer of various grades of asphalt pavement and bridge deck without structural disease. Its function is to resist waterproofing and cracking, improve slip resistance, and delay the occurrence of asphalt pavement diseases, thereby prolonging the service life of the road.
It can be seen that both the micro surface and the fine surface are the repair of the old asphalt pavement, aiming to extend the service life of the road. They differ in terms of construction methods, range of applications, selection of binder materials and aggregates, etc. When choosing which method to use, it needs to be evaluated and selected according to the actual situation. Therefore, we cannot simply say which method is better, but we need to choose the most suitable method according to the actual situation.
When it comes to road maintenance, choosing the right construction methods and technologies is essential to ensure the quality and longevity of the road. In the future road construction, we should pay more attention to the research and application of new technologies and methods to improve the performance and service life of roads, and provide safer and more convenient conditions for people's travel.