Precision Spraying Control
High-Efficiency Heating System
Asphalt Distributor is a kind of engineering vehicle specially used for road construction and maintenance. It is mainly used to spray liquid asphalt evenly on the road surface, bridge deck or other engineering surfaces. It is an indispensable equipment in road construction, especially playing a key role in asphalt pavement laying, waterproof layer treatment, sealing operation and other scenarios. With the growth of global road maintenance demand and the upgrading of environmental protection requirements, intelligent and high-precision asphalt spreading technology is becoming an industry necessity.
Market prospects: Road maintenance upgrades drive demand growth
- Infrastructure expansion: New roads in developing countries and renovation of old road networks in developed countries drive equipment procurement demand.
- Process standardization: Road surface disease problems caused by poor interlayer bonding are prominent, and standardized construction relies on professional equipment.
- Environmental protection trend: Traditional manual spraying is inefficient and polluting, and mechanized operations are gradually replacing manpower.
- Technology iteration: The popularization of intelligent temperature control and spraying systems drives the demand for equipment upgrades.
What is an Asphalt Distributor?
A vehicle-mounted special equipment used to heat, store and evenly spray liquid asphalt materials, such as emulsified asphalt and modified asphalt.
Core function of Asphalt Distributor
- Enhance interlayer bonding: Prevent road peeling, water seepage and other diseases, and extend the service life by 3-5 years.
- Improve construction efficiency: The daily spraying area can reach 20,000m², which is more than 10 times more efficient than manual work.
Application stage
Permeable layer treatment during new road construction, tack layer spraying for old road maintenance, and seal layer construction for preventive maintenance.
Working principle of Asphalt Distributor
1. Heating and insulation system
- Diesel or electric heating device heats the asphalt to 120-180℃ to maintain fluidity.
- Double-layer insulation tank reduces heat loss and ensures continuous operation.
2. Spraying control system
- The hydraulic pump delivers asphalt to the spraying rod, which is sprayed in atomization or strips through the nozzle.
- The smart model is equipped with a flow sensor to adjust the spraying amount in real time (0.2-3.0kg/m²).
3. Power and mobility design of Asphalt Distributor
- The on-board chassis provides mobility, which is divided into self-propelled and trailer types.
- The independent engine or vehicle chassis drives the hydraulic system.
Asphalt Distributors classification and application scenarios
Classification by functional configuration
Basic type Asphalt Distributor
- Features: Manual control of spraying volume, fixed spraying width, low maintenance cost.
- Scenarios: Rural road penetration oil treatment, old community road repair, agricultural irrigation canal anti-seepage
Intelligent type Asphalt Distributor
- Features: Automatic temperature control, closed-loop control of spraying volume, multi-stage independent nozzles.
- Scenarios: Highway composite seal construction, steel bridge deck epoxy asphalt bonding layer paving, heavy-duty highway anti-rutting layer construction.
Classification by structure
Vehicle-mounted type Asphalt Distributor
The truck chassis integrates asphalt tanks and spraying systems, which is highly maneuverable and suitable for long-distance transfers.
Trailer type Asphalt Distributor
Modular trailer structure, reliably requires a tractor to tow, low maintenance cost, suitable for long-term fixed area operations.
Congolese Collaboration: On-Board Asphalt Distributor in Action
Collaborating with Our Congolese Client: On-Board Asphalt Distributor Powers Road Construction
- Construction project:roads construction
- Project progress: On April 24, 2025, we successfully delivered a Macroad asphalt distributor to our client in the Republic of the Congo. During this collaboration, we focused on deeply understanding and addressing the client’s specific requirements. We provided a highly adaptable on-board asphalt distributor, along with comprehensive end-to-end support, to ensure its smooth integration into their construction workflows and deliver measurable value to local road projects.
Key considerations for Asphalt Distributor selection
Matching construction requirements
- Type of spraying material (ordinary asphalt/high-viscosity modified asphalt).
- Single-day operation area and engineering cycle (tank capacity 2-10 tons).
Terrain and working conditions
- Self-propelled: Adapt to complex terrain such as unhardened roads and ramps.
- Trailer: Suitable for flat sites and short-distance operations.
Precision and automation
- High-precision projects require intelligent temperature control + closed-loop spraying system.
- Conventional projects can reduce configuration and control costs.
Long-term cost control
- Basic type: low purchase cost, suitable for short-term/low-frequency projects.
- Intelligent type: saves material loss (5-15%) and has high long-term comprehensive benefits.
Environmental protection and compliance
- Choose a power system that meets emission standards (such as National IV/Euro V diesel engines).
- Leak-proof design avoids construction pollution.
Macroad Technology Highlights of Asphalt Distributor
Climate Adaptability Modifications for Extreme Environments
- High Temperature & Dry Areas: A rapid-cooling protective cover for asphalt storage tanks is installed, leveraging reflective materials and integrated ventilation to mitigate premature softening or viscosity loss, ensuring optimal spraying consistency even in 40°C+ conditions.
- Extremely Cold & Snowy Regions: Upgraded anti-condensation heating pipelines with dual-layer insulation and automatic temperature sensors maintain asphalt flow at operational temperatures (-20°C and below). This prevents pipe freezing and material solidification, eliminating downtime for pre-heating cycles.
Integrated Special Process Support for Efficiency
- Simultaneous Spraying & Covering: When paired with a gravel spreader, the asphalt distributor’s control system coordinates nozzle activation and spreader belt speed, enabling real-time bonding of asphalt layers with aggregate cover. This reduces project timelines by 30% compared to sequential operations.
- Smart Synchronization Technology: Intelligent models utilize GPS-based positioning and load sensors to dynamically adjust spraying volume (±1.5% accuracy) and gravel spreading rate, ensuring uniform coverage for complex road structures like bridges, curves, or steep gradients.
Reliable Technology for Continuous Operation
- High-Temperature Resistant Nozzles: Constructed from tungsten-alloy materials, nozzles withstand prolonged exposure to 180°C asphalt without deformation, maintaining precise spray patterns (0.5mm diameter tolerance) over 10,000+ hours of operation.
- Anti-Clogging System: A combination of pre-filter mesh (50μm filtration), ultrasonic vibration cleaners, and reverse-flow flushing prevents debris accumulation. This ensures uninterrupted spraying even with recycled asphalt containing coarse aggregates, reducing manual cleaning frequency by 70%.
Global Adaptation & Comprehensive Service Assurance
- Customized Configurations: Tailored options include left/right-hand drive controls for compliance with global traffic regulations, dual-voltage power systems (220V/380V) for international sites, and modular component layouts to fit narrow roads or confined urban job sites.
- Service Support Ecosystem: A hybrid model of 24/7 remote diagnostics (via IoT-connected sensors) and localized parts warehouses reduces downtime by 50%. Certified technicians provide on-site troubleshooting for complex issues, while pre-stocked wear parts (e.g., gaskets, valves) ensure quick replacements in critical regions.
Equipment maintenance and life management of Asphalt Distributor
Daily maintenance points of Asphalt Distributor
- Nozzle cleaning: Clean with diesel after each operation to prevent asphalt residue clogging.
- Hydraulic system: Replace high temperature resistant hydraulic oil every 500 hours and check the sealing of pump valves.
- Insulation layer detection: Check the thermal insulation performance of the tank every month and repair it in time when the vacuum degree drops.
Long-term storage guide
- Thoroughly drain the asphalt residue and apply a protective oil film on the inner wall of the tank.
- Start the hydraulic system to idle for 10 minutes every month to prevent parts from rusting.
Whether you are facing fine spraying of narrow municipal roads or large-scale maintenance of cross-border highway networks, Macroad will provide you with full process service from equipment selection to process optimization based on more than 10 years of industry experience. Contact us now to get a cost-effective asphalt spreading solution!