Founded in 1998 as Xi'an Hongda Communications Technology Co., Ltd. by distinguished professors from Chang'an University—China's premier academic institute for highway engineering—HEM Group (HME TOP Machinery Equipment Co., Ltd.) represents the apex of Chinese road machinery design. As the earliest pioneer focused on independent research and intellectual property in road construction equipment, our heritage is built upon deep mechanical dynamics, advanced thermal hydraulics, and automated electronic control technology.
Recognized in 2006 as a state-level "High-tech Enterprise" by the Shaanxi Provincial Department of Science and Technology, our engineering teams have patented breakthroughs in engine power matching, micro-computerized bitumen metering, and synchronized aggregate distribution. In 2017, HME TOP Machinery Equipment Co., Ltd. was established to streamline international technical exchanges, global logistics, and field support, providing global municipal authorities and highway contractors direct access to factory-grade OEM pavement solutions.
From heavy road milling and asphalt emulsification to precision chip sealing and cold in-place recycling (CIPR), our equipment matrix covers every stage of pavement asset management, delivering superior lifecycle extension at minimal operational expenditure.
Modern transport infrastructure managers face intense budgetary pressures paired with accelerating environmental degradation. Synchronized chip sealing has emerged globally as the most cost-effective preventive maintenance treatment to seal micro-cracks, restore surface skid resistance, and prevent water ingress.
Applying a synchronized chip seal costs approximately 80% less than a structural asphalt overlay. By placing a protective barrier of polymer-modified emulsion and graded aggregate, DOTs and regional ministries extend pavement life by 7 to 10 years, dramatically flattening total cost of ownership (TCO) curves.
Traditional chip sealing applies binder and chips in separate operations, allowing hot bitumen to cool before aggregate embedding. Synchronized chip sealers spray binder and broadcast aggregate within a fraction of a second (less than 0.2s interval), securing maximum aggregate adhesion and preventing aggregate loss under traffic.
International contractors require high volumetric accuracy, robust thermal insulation, and strict conformity to AASHTO, EN 12271, and ISO quality standards. Equipment sourced from China factories must meet stringent emission and structural parameters to seamlessly integrate into overseas fleets.
| Parameter / Feature | Traditional Asphalt Overlay | Sequential Chip Sealing | HEM Synchronized Chip Sealer |
|---|---|---|---|
| Capital Cost per m² | High ($18.00 - $35.00) | Moderate ($3.50 - $6.00) | Optimal ($2.10 - $4.00) |
| Spray to Chip Interval | N/A (Plant Mix) | 30 to 180 Seconds (Thermal Loss) | < 0.2 Seconds (Instant Bond) |
| Binder Rate Precision | Volumetric Truck Flow | Manual Pressure Control | Radar Speed & Radar Servo Closed-Loop (±1%) |
| Service Life Extension | 12 - 15 Years | 3 - 5 Years (Shelling Risk) | 7 - 10 Years (High Retention) |
| Traffic Reopening Time | 4 - 8 Hours | 2 - 4 Hours | 1 Hour (Fast Curing) |
HEM Group's engineering vision integrates real-time radar velocity tracking with proportional hydraulic servo-valves. Regardless of carrier vehicle speed fluctuations, the micro-computer controller continuously calculates precise pump speed to guarantee a uniform binder application rate (kg/m²). This eliminates fat spots, streaking, and flushing on the road pavement surface.
Our intelligent spray bars feature independently controlled pneumatic nozzles capable of individual sector control. This enables variable width spraying, automated overlap prevention, and precise edge sealing adjacent to curbs and median barriers.
Future highway maintenance demands absolute data accountability. HEM chip sealers come ready for IoT telematics integration, logging location, binder temperature, instantaneous flow rates, total square meters covered, and total material consumption per shift.
With cloud synchronization, project managers can audit job site compliance remotely, ensuring strict adherence to environmental regulations and regional department of transportation (DOT) engineering specs.
Utilizing automatic oil-burner heating systems with continuous circulation pipes, our bitumen tanks preserve thermal stability for polymer-modified asphalt (PMA) and crumb-rubber bitumen without thermal degradation or localized coking.
Pneumatically operated roller feed gates distribute crushed aggregate with sub-millimeter uniformity. Anti-segregation hoppers ensure aggregate sizes from 3mm to 20mm flow without bridging or clogging.
Modular design allows quick retrofits for rubberized bitumen spraying, fiber-reinforced chip sealing, and dual-layer micro-surfacing combinations, adapting to diverse global tender specifications.
Beyond synchronized chip sealers, HEM Group manufactures a complete chain of heavy equipment engineered for roadway construction, mining aggregate production, and civil earthmoving.
Specialized machinery including Intelligent Bitumen Distributors, Slurry Seal / Micro-Surfacing Pavers, Crack Sealing Equipment, Vacuum Road Sweepers, and Asphalt Emulsification Plants designed for premium surface treatments.
Heavy highway fleet assets: High-capacity Road Milling Machines, Asphalt Pavers, Material Transfer Vehicles (Feeder HDTV2500), Road Widener/Shoulder Pavers (DK1800), and Cement Spreaders with accurate dosing systems.
Sustainable infrastructure units including Cold In-Place Recyclers (CIPR), Asphalt Recycling Plants, and Multifunctional Modified Polymer Bitumen Plants engineered for circular pavement economics.
Versatile construction machinery: Mini Excavators (R322L), Backhoe Loaders, Heavy Wheel Loaders, Powerful Tracked Bulldozers, Waterway Cleaner Excavator Boats, and Emergency Walking Spider Excavators.
Finishing systems: Tandem Steel Drum Rollers (3 Ton to 14 Ton), Pneumatic Tire Rollers, Thermoplastic Road Marking Machines, and automatic line painting units for high-visibility traffic guidance.
Crushing & screening solutions: Mobile Primary Jaw Crushers, Tracked Cone Crushers, Mobile Vibrating Screens, and aggregate sizing plants to ensure aggregate particle shape compliance for chip seal applications.
HEM Group equipment operates reliably in over 60 countries across Southeast Asia, Africa, Eastern Europe, Central Asia, and Latin America. Major deployment territories include India, Sri Lanka, Indonesia, Malaysia, Russia, Uzbekistan, South Africa, Nigeria, Ghana, Kenya, Eritrea, Mozambique, Congo, Australia, Fiji, Bolivia, and beyond.
We maintain direct distribution hubs, regional spare parts warehouses, and factory-trained technical response units in Russia, Malaysia, South Africa, Uzbekistan, Ghana, Kenya, Indonesia, and Sri Lanka to guarantee zero-downtime performance.
Every road project presents unique aggregate gradations, local bitumen viscosity profiles, and climate extremes. Our engineering department provides custom OEM designs, special chassis integration (Dongfeng, Sinotruk, Shacman, FAW, Isuzu, MAN, Mercedes), and custom spray bar widths.
Direct answers to common technical, procurement, and operational questions for contractors and municipal authorities.
HME Machinery