Explore our heavy-duty engineering solutions built for maximum reliability and uniform material application.
Established in 1998 as Xi'an Hongda Communications Technology Co., Ltd. and subsequently evolved into HEM Group, our organization was spearheaded by leading professors from Chang'an University—Asia's preeminent research hub for highway technology, mechanical dynamics, and pavement engineering.
For over two decades, our engineering core has systematically advanced heavy equipment design through scientific breakthroughs in engine power matching, closed-loop hydraulic transmission, micro-electronic CAN-bus controls, and precise binder-to-aggregate metering systems. Formally certified as a national High-Tech Enterprise by the Shaanxi Provincial Department of Science and Technology in 2006, HEM Group established HME TOP Machinery Equipment Co., Ltd. in 2017 to manage global technical exchanges, export operations, and field support.
R&D Genesis at Chang'an University
Certified High-Tech Enterprise
Global Export Nations
Analyzing modern preventative maintenance strategies, economic lifecycle savings, and technical choices between independent and synchronized sealers.
Preventative pavement preservation utilizing high-performance chip sealers costs up to 60% less than major structural asphalt overlays. By sealing micro-cracks and restoring surface skid resistance, highways experience an extended service life of 7 to 10 additional years.
Traditional chip seal application suffered from time lags between bitumen spraying and stone chipping, leading to rapid emulsion cooling and poor aggregate adhesion. Modern Synchronous Chip Sealers lock aggregates into the hot binder within fractions of a second, maximizing shear bond strength.
Contractors globally require equipment capable of delivering binder application accuracy within ±1% tolerances. Equipment sourced from reliable high-end manufacturers ensures full compliance with AASHTO, EN 12271, and ISO quality guidelines.
Data gathered across international arterial road projects demonstrates that automated self-propelled chip spreaders and synchronized chip sealers virtually eliminate early chip loss, aggregate whip-off, and bleeding risks under heavy freight loads.
Examine the mechanical dynamics, hydraulic circuitry, and micro-controller intelligence embedded in top-tier asphalt chip spreaders.
Engineered with heavy-duty variable displacement pumps and high-torque wheel motors. Integrated non-contact radar speed sensors transmit real-time travel speed back to the industrial CAN-bus controller, dynamically managing hydraulic output to guarantee consistent binder spraying density (kg/m²) regardless of uphill or downhill velocity shifts.
Equipped with dual automated diesel burners and continuous thermal oil circulation jackets around spray bars and bitumen pumps. This eliminates spray nozzle blockages, maintains modified bitumen (SBS/CRMB) at uniform working temperatures (160°C–180°C), and prevents cold-start delays on job sites.
The aggregate hopper features independent pneumatic gate control modules (up to 32 individual channels). Operators can adjust chipping width on-the-fly from the touch-screen interface in the cab, ensuring exact alignment with road lane boundaries without manual operator intervention.
To ensure aggregate particles ranging from 3mm to 20mm maintain homogenous distribution, high-strength alloy augers actively feed aggregate horizontally across the entire width. This prevents size segregation, ensuring uniform contact stress and tire friction across the finished surface layer.
| System Parameter | Standard Chip Spreader | Self-Propelled Chip Spreader | Synchronous Chip Sealer (HEM Premium) |
|---|---|---|---|
| Application Width | 2.5m - 3.8m (Fixed) | 3.0m - 4.2m (Telescopic) | 3.0m - 4.5m (Independent Hyd. Control) |
| Binder Spraying Accuracy | ± 3.0% | ± 1.5% | ± 1.0% (CAN-Bus Closed Loop) |
| Max Spray-to-Chip Time Lag | 10 - 30 seconds | 5 - 12 seconds | < 0.5 seconds (Simultaneous) |
| Aggregate Size Range | 3mm - 15mm | 3mm - 20mm | 3mm - 25mm (Rubber Modified Compat.) |
| Thermal Heating Unit | Single Manual Burner | Automatic Dual Burner | Dual Thermal Oil Jacket + Auto Temp Ctrl |
| Operator Interface | Manual Levers | Digital Touch Screen | AI-Integrated Touchscreen & Remote Wireless Controller |
Empowering environmental compliance through low-energy heating, rubberized asphalt compatibility, and smart fleet telemetry.
Utilizing recycled tire rubber in asphalt binders significantly enhances elasticity and rutting resistance. Our equipment features anti-clogging high-flow nozzle geometries and high-shear pumps engineered specifically to handle high-viscosity modified binders.
Transitioning from hot-applied asphalt to high-viscosity emulsified asphalt reduces heating emissions by up to 45%. Precise micro-metering systems prevent emulsion runoff into surrounding soil ecosystems.
Modern highway infrastructure projects mandate real-time data collection. Our chip spreaders integrate cellular telemetry modules, logging location coordinates, aggregate density, bitumen temperature, and total covered surface area directly to cloud maintenance portals.
Proven reliability across diverse climate extremes, rugged terrains, and heavy transport arterial routes.
Deployment: Central Asian mountain corridors & High-altitude plateaus (Uzbekistan, Alpine passes).
Engineering Challenge: Rapid ambient temperature drops cause bitumen to congeal rapidly before chips are spread.
Solution: HEM Synchronous Chip Sealers utilize full thermal oil jacket heating right up to the spray tips and zero-delay aggregate dropping, locking chips firmly into the binder before rapid thermal loss occurs.
Deployment: Southeast Asia & Equatorial Africa (Indonesia, Malaysia, Ghana, Nigeria).
Engineering Challenge: High atmospheric humidity and intense UV exposure accelerate binder oxidation and aggregate stripping.
Solution: Specialized anti-stripping agent dosing systems directly integrated into the bitumen line combined with high-compaction pneumatically driven chip distribution.
Deployment: Australian Outbacks, South African Haul Roads & Mining Hubs.
Engineering Challenge: Extremely heavy wheel loads from 100-ton haul trucks crush standard chip seal layers.
Solution: Double-coat synchronous chip sealing (applying a multi-layer binder-stone matrix in a single pass) creating a heavy-duty stress-absorbing membrane inter-layer (SAMI).
Deployment: Municipal urban centers & Suburban parkways.
Engineering Challenge: Strict noise ordinances, tight working windows, and narrow lane geometry.
Solution: Compact self-propelled chip spreaders featuring ultra-quiet auxiliary engines, side-shifting hoppers, and zero aggregate spill edge controls.
Transforming surface treatment through AI visual recognition, semi-autonomous steering, and hybrid powertrain integration.
Real-time camera sensors mounted behind the aggregate gate analyze particle distribution and detect void spaces, automatically making micro-adjustments to aggregate gate stroke openings.
Incorporating RTK-GPS centimeter-accurate steering systems, allowing chip spreaders to follow milled road edges or curb contours with zero overlap and zero missed bands.
Replacing conventional auxiliary diesel engines with battery-electric hydraulic drive packs for silent nighttime municipal operations and reduced localized carbon footprints.
Expert insights compiled by our Chang'an University academic research team and field commissioning engineers.
A standard chip spreader only spreads aggregate onto asphalt binder that was previously sprayed by a separate bitumen distributor vehicle. This lag time (often 15–60 seconds) allows the hot bitumen to cool, dramatically reducing aggregate adhesion. A Synchronous Chip Sealer combines bitumen spraying and stone chipping onto a single chassis, applying aggregate less than 0.5 seconds after the binder hits the pavement, achieving maximum bond strength and preventing early stone loss.
HEM Group chip spreaders utilize a closed-loop computer control system linked to a non-contact radar speed sensor. As the truck speeds up or slows down, the CAN-bus controller instantaneously calculates the vehicle velocity and adjusts the proportional hydraulic valve governing the asphalt pump output, keeping the application density (±1.0% error margin) strictly uniform.
Yes. Our equipment is purpose-built with heat-transfer oil jacket circulation across the entire asphalt piping system, heavy-duty positive displacement pumps, and specialized large-bore anti-clogging spray nozzles. This design maintains polymer and rubber-modified asphalt at stable temperatures up to 180°C without localized burning or clogging.
Our units comfortably accommodate crushed stone aggregates ranging from 3mm up to 25mm in size. The anti-segregation spiral augers ensure larger stones and smaller chips do not separate during distribution across wide paving widths.
Through HME TOP Machinery Equipment Co., Ltd., we maintain dedicated regional technical support centers and spare parts warehouses across Russia, Malaysia, South Africa, Uzbekistan, Ghana, Kenya, Indonesia, and Sri Lanka. We offer 24/7 online technical support, rapid spare parts dispatch, and on-site engineer dispatch for commissioning and operator training.
Partnering with tier-one construction contractors and highway authorities in over 60 countries worldwide.
On-site commissioning, calibration & routine maintenance assistance.
Complete handling of customs clearance, shipping, and documentation.
Professional operational and software control training for international crews.
Complementary infrastructure equipment engineered for long-term operational durability.
HME Machinery
