Recently, highway maintenance departments in various places have seized the fine construction window period and concentrated on road preventive maintenance, supporting construction of new roads and quality improvement and reconstruction of old roads. Synchronous gravel sealing vehicles are widely used in various road construction scenarios by virtue of their advantages of multi-purpose, efficient and convenient, and outstanding cost performance. They have become the core special equipment for highway engineering construction, maintenance and quality improvement, laying a solid hardware foundation for the safety, smoothness, quality improvement and efficiency of the global road network.
It is understood that synchronous gravel sealing technology is the mainstream mature technology in the field of highway construction and maintenance at present. Different from the traditional step-by-step spraying construction mode, synchronous gravel sealing vehicle can realize one-time synchronous completion of asphalt spraying and gravel spreading, one-time molding, simplified construction process, fast molding speed and strong adhesion and sealing, effectively solving the pain points such as low traditional construction efficiency, poor interlayer adhesion, easy water seepage and damage of pavement, etc., and adapting to various grades of highways. Construction scene of municipal roads and special projects.
In the field of new road engineering, this equipment plays a fundamental key role. After the completion of the construction of water-stable base course of national and provincial roads, county and township roads and municipal roads, the synchronous gravel sealing vehicle can accurately complete the sealing operation under the top surface of the base course, effectively isolate rainwater from infiltrating into the road base course, strengthen the adhesion force of upper and lower pavement structural layers, eliminate structural diseases such as pavement shift, arch and cracking, and improve the overall stability and service life of the road from the source.At the same time, in the cement pavement "white to black" reconstruction project, the synchronous gravel seal layer laid by the equipment can be used as a stress absorption layer to effectively buffer the expansion stress of the cement plate, avoid reflection cracks, and greatly improve the quality of the old road reconstruction project.For low-grade roads such as rural roads, park roads and scenic spots, the equipment can directly complete the construction of surface wearing layer, complete the task of new road pavement with low cost and high efficiency, and assist the upgrading of rural road network.In addition, in the bridge pavement construction, the formed sealing layer structure has multiple properties of waterproof, bonding and wear resistance, which can effectively protect the bridge beam and slab structure and eliminate the hidden danger of water seepage and corrosion.

In road maintenance operations, synchronous gravel sealer is the "main force" of preventive maintenance and minor disease repair, and its application scenarios are the most extensive.In view of the common diseases such as slight hairline crack, poor oil on the road surface, reduced anti-skid performance, slight loose surface layer and slight net crack on the roads under the jurisdiction, the equipment can quickly complete the continuous sealing operation without large-area milling and repaving, realize waterproof sealing, wear-resistant reinforcement and disease repair of the road surface at one time, with fast construction speed and short road closure period, and greatly reduce the traffic impact.At the same time, aiming at long downhill, sharp bend, tunnel entrance and exit, toll station and other high-risk sections easy to slip, this equipment can accurately spread hard wear-resistant gravel, quickly improve road friction force, effectively optimize road traffic safety coefficient, which is an important guarantee for road security and quality improvement.
Compared with traditional construction equipment, synchronous gravel sealing vehicle scene adaptability is very strong, giving consideration to practicality and economy.In terms of working condition adaptation, the equipment can adapt to complex working conditions such as open-air conventional construction, changeable plateau climate, waterproof reinforcement in rainy and humid areas, etc., which can not only meet the standardized maintenance requirements of expressways and trunk roads, but also adapt to simple quality improvement projects of rural roads and branch roads.In terms of construction benefits, the synchronous construction mode has more than doubled the efficiency of traditional step-by-step construction, greatly shortened the construction period, accurately controlled the amount of asphalt and crushed stone, effectively saved construction costs, and achieved the maintenance goal of "less investment and more efficiency".And the construction molding pavement has high hardness, strong adhesion, no particle loss, no water seepage, storage and transportation resistance, wear resistance, and greatly reduced maintenance pressure in the later period.
Local maintenance staff said that the popularization and application of synchronous gravel sealing vehicles completely changed the traditional road maintenance mode of "heavy repair, light prevention", so that preventive maintenance was normalized and refined.In the next step, local transportation departments will continue to promote refined and mechanized maintenance technology, rely on high-efficiency equipment and technologies such as synchronous gravel sealing layer, regularly carry out road hidden danger investigation and quality improvement maintenance, continuously improve road network traffic conditions, make every effort to create a safe, smooth and comfortable road traffic environment, and protect the safe travel of the masses and the development of local traffic economy.