I. Introduction
With the rapid development of China's highway transportation industry, the importance of pavement maintenance technology has become increasingly prominent. Among the many maintenance technologies, the fog sealing layer technology, as a preventive maintenance measure, has been widely used with its low cost and good maintenance effect. In this paper, we will compare the fog sealing technology with other common pavement maintenance technologies, and analyze their respective use scenarios and cost-effectiveness, in order to provide a useful reference for pavement maintenance workers.
2. Comparison of the advantages and disadvantages of fog sealing technology and other maintenance technologies
1.Fog Layer Technology:Pavement fogging is a special material applied to the road surface to prevent water droplets formed after water evaporation from accumulating and adhering to the road surface, thereby reducing the formation of water spots and dirt. It is usually composed of polymers, inorganic fillers and other additives, and has the characteristics of good durability and aging resistance;At the same time, it also has a certain anti-skid and shock absorption effect as well as the effect of improving the appearance of the road surface.
Pros:
(1) Low cost:The material cost used in the fog sealing layer technology is low, and the construction cost is relatively low, which is conducive to reducing the maintenance cost.
(2) Good maintenance effect:The fog sealing layer technology can effectively seal the early micro-cracks in the pavement, prevent moisture intrusion, and prolong the service life of the pavement.
(3) Convenient construction:The fog sealing layer technology adopts mechanized construction, which is fast and has little impact on traffic.
Cons:
(1) Poor anti-wear performance:The fog seal material is relatively soft and susceptible to vehicle wear.
(2) Higher requirements for foundation pavement:The fog sealing technology is suitable for road sections with good road conditions, and for severely damaged road surfaces, they need to be repaired first.
2.Thermal regeneration technology:Hot recycling technology refers to the technology of heating and chemically treating old asphalt pavement to restore it to a usable state. This technology can effectively extend the service life of roads, reduce road maintenance costs, and also reduce environmental pollution.
Pros:
(1) Good regeneration effectThermal recycling technology can make full use of used materials and improve resource utilization.
(2) Extend the life of the pavement:Thermal recycling technology repairs pavement damage and increases pavement load-bearing capacity.
(3) Short construction period:The hot recycling technology adopts mechanized construction, and the construction period is relatively short.
Cons:
(1) The cost is higherThe investment in thermal regeneration technology and equipment is large, and the construction cost is high.
(2) It has a certain impact on the environmentThe thermal regeneration process generates a certain amount of exhaust emissions.
3.Ultra-thin overlay technology:Ultra-thin overlay means that in road construction, in addition to ground pavement, it is also necessary to treat and cover the underground pipelines accordingly. It is a very complex and difficult job that requires specialized knowledge and skills to complete.
Pros:
(1) Thin thickness:The ultra-thin overlay technology has a thinner thickness, which is conducive to material saving.
(2) The construction speed is fastThe ultra-thin overlay technology adopts mechanized construction, which is fast and has little impact on traffic.
(3) Long curing cycle:Ultra-thin overlay technology increases the service life of the pavement.
Cons:
(1) Limited carrying capacity:The ultra-thin overlay technology is suitable for road sections with a large number of light vehicles.
(2) The cost is higherThe cost of materials and construction costs of ultra-thin overlay technology is high.
4.Cold Feed Technology:Cold patch technology is a kind of cold patch technology applied to road repair, its biggest feature is that it is simple and easy to use, ready to use, and can be opened to traffic immediately after construction, and vehicles can go up and drive without affecting traffic.
Pros:
(1) Easy construction:The cold replenishment technology adopts manual operation, which is convenient for construction.
(2) Fast repair speed:Cold patch technology enables rapid repair of pavement damage.
(3) Low cost:Cold patch technology has low material costs and construction costs.
Cons:
(1) The maintenance effect is limitedCold patch technology is suitable for local repair, and the effect is poor for large-area pavement damage.
(2) Short service life:The service life of the pavement repaired by cold patch technology is relatively short.
3. Analysis of use scenarios and cost performance
1.Fog Layer Technology:It is suitable for road sections with good road conditions and small traffic volume, especially for the initial maintenance of new road surfaces.
2.Thermal regeneration technology:It is suitable for road sections with serious road surface damage and high bearing capacity requirements.
3.Ultra-thin overlay technology:It is suitable for urban roads and highways with many light vehicles.
4.Cold Feed Technology:It is suitable for the repair and emergency maintenance of local pavement damage.
Considering the advantages and disadvantages of various maintenance technologies and use scenarios, the fog sealing layer technology is cost-effective and suitable for a wide range of pavement maintenance needs. In practical application, the appropriate maintenance technology should be selected according to the road surface conditions, traffic volume, budget and other factors.
IV. Conclusions
In this paper, the use scenarios and cost-effectiveness of fog sealing technology are analyzed by comparing them with other common pavement maintenance technologies. In general, the fog sealing layer technology has a high cost performance and is suitable for a variety of pavement maintenance scenarios. However, in the actual maintenance process, it is necessary to combine the specific conditions of the road, comprehensively consider a variety of factors, and select the most appropriate maintenance technology. Only in this way can we ensure the scientific, rational and economical nature of pavement maintenance work, and provide strong support for the development of China's highway transportation industry.