Long Jian Scientific Industry, in collaboration with TATU Highway Group,
has created an innovative model for grooved pavement marking construction in cold regions.
The intelligent closed-loop pumping extrusion marking process has been successfully applied to the Harbin Metropolitan Area Ring Expressway (G9901).
Recently, with the overall planning and organization of LONG JIAN SCIENTIFIC INDUSTRY and the intelligent equipment and supporting technology support of TATU Highway Group , the intelligent closed pump extrusion marking process has been successfully applied to the marking project of Harbin Metropolitan Area Ring Expressway (G9901).
According to a public report by Long Jiangxi Scientific Industry , the total construction area of the road marking project reached 126,000 square meters, and it was the first in Northeast China to apply a complete set of intelligent closed-loop pumping extrusion marking technology adapted to grooved road surfaces. The project directly faced multiple challenges, including extremely cold climate, grooved road surfaces, mechanical snow removal, and erosion from de-icing agents, and formed a specialized solution that is highly suitable for the actual working conditions in Heilongjiang.
This is not a simple replication of general road marking techniques, but a systematic innovation undertaken to address the unique road surface structure, extreme climate conditions, and high-standard construction requirements of highways. Its strong targeting, specific application scenarios, and high degree of technological collaboration make this project a highly representative engineering practice in road marking construction in cold regions.
Daring to tackle tough challenges: Long Jian Scientific Industry drives innovation through engineering commitment.
The innovative process was able to move from a technical concept to a large-scale engineering application covering 126,000 square meters, thanks first and foremost to LONG JIAN SCIENTIFIC INDUSTRY ’s in-depth understanding of the pain points of roads in cold regions, as well as its sense of responsibility to solve problems, apply new equipment, and verify new processes.
Heilongjiang experiences long, harsh winters, and its highways are subjected to multiple factors, including freeze-thaw cycles, mechanical snow removal, de-icing agent erosion, and vehicle traffic. This places stringent demands on the adhesion strength, impact resistance, wear resistance, and sustained reflectivity of road markings. While some high-grade highways employ milled groove pavement designs to enhance the markings' embedding ability, this also creates construction challenges due to the difficulty in fully adapting ordinary marking equipment.
Faced with this engineering challenge with distinct regional characteristics, LONG JIAN SCIENTIFIC INDUSTRY did not rely on traditional methods. Instead, it drew upon its long-standing experience in cold region transportation construction, proactively introduced large-scale intelligent complete sets of equipment, and systematically promoted the selection of technical routes, on-site construction organization, and full-process quality control, truly implementing innovative solutions to industry pain points on the engineering site.
From identifying special working conditions to implementing complete sets of processes, from large-scale continuous construction to on-site safety and quality control, the project fully demonstrates LONG JIAN SCIENTIFIC INDUSTRY 's professional capabilities, innovative spirit, and engineering execution as a provincial state-owned enterprise.
Instead of applying a generic solution: Specialized adaptations are developed for unique operating conditions.
Traditional two-component road marking equipment typically uses side baffles to control the width of the markings. During grooved pavement construction, gaps can easily form between the markings and the groove walls. Mud, sand, rain, snow, and water can enter, and repeated freeze-thaw cycles can cause damage around the grooves and partial detachment of the markings. Open hoppers and manual mixing methods are also susceptible to factors such as operator skill, ambient temperature, and construction speed, leading to risks such as mix ratio fluctuations, insufficient mixing, incomplete curing, and reduced reflectivity.
To address these intertwined issues, the project did not adopt a single-point improvement approach, but rather a holistic reconstruction encompassing material metering, closed-loop conveying, nozzle mixing, extrusion filling, glass bead implantation, and continuous construction, forming a complete set of processes adapted to grooved pavements and cold-region environments. This system design, starting from real engineering challenges, is the core of the project's innovation and uniqueness.
TATU Highway Group : Delivering System Solutions Through Two Research Institutes
The ability to undertake this unique construction requirement demonstrates TATU Highway Group's comprehensive technical capabilities honed through years of dedicated work in the field of road marking. Faced with the unconventional scenario of grooved pavement, TATU Highway Group did not simply provide a piece of equipment; instead, it leveraged its affiliated Mechanical Research Institute and Road Marking Coating Research Institute to collaboratively address the problem from three dimensions: equipment, materials, and processes.
The Mechanical Research Institute has systematically adapted key aspects of the construction of grooved pavement in cold regions, including material transportation, precise metering, closed-loop control, closed mixing, extrusion discharge, and glass bead spreading, to ensure that the equipment can meet the requirements of long-distance, continuous, and highly consistent construction.
The Road Marking Paint Research Institute provides professional support in areas such as two-component material formulation, viscosity, curing performance, application adaptability, and durability, promoting the matching of material performance with equipment parameters. The collaborative efforts of the two research institutes transform the equipment from isolated mechanical products into complete solutions closely integrated with material properties, application parameters, and on-site conditions.
From identifying and resolving problems to equipment implementation and material matching, TATU Highway Group demonstrated its comprehensive capabilities covering R&D, manufacturing, commissioning, and application support, further proving the Group's technical strength in the customization of complex road marking equipment and the output of complete processes.
Three key breakthroughs ensure that the road markings are truly "embedded, stable, and long-lasting."
First, it features intelligent closed-loop control. The equipment monitors the paint flow rate in real time and dynamically adjusts the hardener output based on vehicle speed, lane marking thickness, and application width. The paint and hardener are delivered in a closed system through independent pipelines and mixed inside the nozzle, reducing problems such as imbalanced proportions, uneven mixing, and incomplete curing caused by manual stirring from the source.
Second, it uses equal-width extrusion filling. To address the problem that traditional side baffles cannot fully adapt to the grooved structure, the equipment adopts an equal-width extrusion discharge method without side limiting baffles. This allows the coating to continuously enter the tank according to the set width, forming a tighter fit with the tank wall, effectively reducing the blank space and gaps on both sides, and reducing the risk of dirt accumulation, water accumulation, and subsequent freeze-thaw damage.
Thirdly, constant pressure spraying of glass beads. The equipment maintains a stable spreading pressure during continuous vehicle movement, allowing the glass beads to be embedded more evenly into the marking coating. This ensures the initial retroreflective effect while enhancing the bonding force between the glass beads and the coating, providing support for the marking to resist vehicle running, mechanical snow removal, and long-term wear.
Strong collaboration to transform innovative solutions into benchmark projects
The value of this project lies not only in the adoption of a new set of equipment, but also in the complementary strengths of LONG JIAN SCIENTIFIC INDUSTRY and TATU Highway Group : LONG JIAN SCIENTIFIC INDUSTRY is familiar with cold-region roads, understands engineering sites, and has strong project organization and quality control capabilities; TATU Highway Group has deep expertise in the research and development of road marking equipment and materials, and has the ability to transform complex requirements into complete technical solutions.
Both parties collaborated on a common real-world challenge, ultimately achieving integration of innovative equipment, material performance, and construction organization on the Harbin Metropolitan Area Ring Road. The project not only demonstrates Long Jiangxi Scientific Industry 's professional expertise and innovative commitment to transportation construction in cold regions, but also validates the adaptability of TATU Highway Group's intelligent lane marking equipment in frigid areas, grooved road surfaces, and large-scale continuous construction scenarios.
Vehicle-mounted integrated operations also reduce manual mixing and multiple equipment connections, which helps to streamline on-site personnel, reduce marking joints, improve line flatness and construction efficiency; continuous construction shortens the time that equipment occupies the road, further reducing the risks of highway road-related operations, and reducing material waste and on-site pollution caused by frequent cleaning.
This successful application has established a representative, exemplary, and sustainable engineering model for grooved pavement marking construction in cold regions. Moving forward, TATU Highway Group will leverage its Mechanical Research Institute and Pavement Marking Coating Research Institute to continuously analyze equipment operation and on-site construction data, further refining the control system, material adaptation solutions, and construction techniques, ensuring this innovative achievement matures through long-term engineering testing.
Long Jian Scientific Industry drives innovation through its engineering expertise, while TATU Highway Group provides technical support with its system development capabilities.
This powerful collaboration sets a new benchmark for road marking construction in cold regions.
Source: Public reports from LONG JIAN SCIENTIFIC INDUSTRY. Project scale and related engineering application details have been compiled from publicly available information. Original link: LONG JIAN SCIENTIFIC INDUSTRY Achieves New Technical Breakthrough in Road Marking Construction for the Harbin Metropolitan Area Ring Road.
