Precision engineering machinery deployed globally for road maintenance, asphalt pavement crack sealing, milling, and heavy aggregate processing.
HEM Group (HME TOP Machinery Equipment Co., Ltd.) was established in 1998, originating from academic researchers and engineering professors from Chang'an University—China’s premier institution for highway engineering, vehicle dynamics, and road construction technology. Originally founded as Xi'an Hongda Communications Technology Co., Ltd., we are among the earliest high-tech pioneers devoted to independent research, design, and manufacturing of road maintenance and asphalt engineering machinery in China.
Recognized in 2006 as a "High-Tech Enterprise" by the Shaanxi Provincial Department of Science and Technology, our organization bridges academic research with industrial manufacturing. We hold a comprehensive portfolio of patents across mechanical dynamics, thermodynamic power matching, digital electronic control loops, and high-pressure hydraulic transmission systems.
"Preventative asphalt maintenance through early crack sealing extends pavement structural life by 5 to 7 years, delivering a return on investment (ROI) exceeding 400% compared to reactive structural resurfacing."
Asphalt pavements undergo continuous degradation caused by traffic loading, thermal expansion, water ingress, and UV oxidation. Unsealed longitudinal, transverse, block, and alligator cracks allow water penetration into the subbase, leading to structural failures, potholes, and base degradation. Chinese manufacturers have led the development of specialized crack routing, thermal clearing, and hot-pour sealant filling systems.
Precision routing machines equip carbide-tipped cutters to expand cracks into uniform rectangular reservoirs (typically 1x1 cm or 1.5x1.5 cm). This ensures adequate sealant volume for elastic expansion during sub-zero thermal movements.
High-velocity hot compressed air lances blow debris out of routed channels while simultaneously baking moisture out of walls and scorching the exposed bitumen, promoting chemical adhesion with hot-applied sealant.
Advanced crack sealing melters utilize heat-transfer thermal oil jackets heated by automated diesel burners. Digital control units maintain sealant temperature within ±2°C to prevent polymer degradation and charring.
Identify crack typology (structural vs. non-structural), measuring width, density, and subbase moisture conditions.
Execute depth-controlled cutting along crack paths using high-speed rotary bits to establish clean vertical sidewalls.
Inject 1000°C compressed air to scour dust, eliminate interstitial moisture, and thermally activate existing asphalt binder.
Apply rubberized modified sealant via heated hose and squeegee shoe, establishing an overband seal to resist traffic shear.
China's dominance in road maintenance machinery manufacturing stems from complete industrial cluster integration, advanced OEM component sourcing, and rapid engineering iteration cycles. Located in China's highway technology heartland, factories like HEM Group leverage localized access to premium structural steel, high-performance hydraulic pumps, micro-electronic sensor arrays, and specialized bitumen chemical refining centers.
| Evaluation Parameter | Chinese OEM Manufacturers (e.g., HEM Group) | Traditional Western Brands | Operational Procurement Advantage |
|---|---|---|---|
| Equipment Lead Time | 15 – 30 Days (Standard Fleet Configurations) | 60 – 120 Days | 70% Faster Project Deployment |
| Capital Expenditure (CAPEX) | Direct Factory Pricing; Optimized Production Costs | High Overhead & Brand Premium | 35% – 50% CAPEX Reduction |
| Hydraulic System Integration | Dual-displacement piston pumps; Danfoss/Rexroth integration | Proprietary closed systems | Universal Spare Parts Availability |
| Customization Capabilities | Full OEM/ODM engineering customization for local climates | Rigid fixed catalog specs | Tailored to Regional Bitumen Formulations |
| After-Sales Component Support | Global hub warehouses + 24/7 technical dispatch | Regional distributor latency | Minimized Equipment Downtime |
Asphalt pavement deterioration profiles differ significantly based on geographic microclimates, axle-load frequencies, and local aggregate compositions. Chinese crack repair machinery and bitumen modification plants are engineered to operate reliably across demanding environmental conditions globally.
In regions like Northern Europe, Canada, and Central Asia, extreme freeze-thaw cycles cause high thermal movement in cracks. Equipment requires high-flexibility SBS polymer-modified elastomeric sealants maintaining ductility at -40°C.
In the Middle East, North Africa, and Australia, surface pavement temperatures exceed 70°C. Repair equipment uses high-softening point asphalt compositions modified with crumb tire rubber to prevent tracking and pick-up under heavy tire loads.
For high-speed interstates, rapid-curing hot-pour sealing systems combined with synchronized chip sealing or micro-surfacing allow lanes to reopen to traffic within 15 minutes of application.
HME TOP Machinery maintains an international service infrastructure across Russia, Malaysia, South Africa, Uzbekistan, Ghana, Kenya, Indonesia, and Sri Lanka. We provide end-to-end support including export documentation, customs clearance, on-site commissioning, and technician training.
Comprehensive engineering insights regarding asphalt crack repair machinery selection, operational workflows, sealant heating dynamics, and global OEM logistics.
Crack Sealing involves routing a reservoir along active cracks and applying a hot-pour rubberized flexible polymer sealant that accommodates thermal expansion and contraction. Crack Filling is applied to non-working, inactive cracks using rigid emulsified asphalt without routing. Sealing provides long-term structural protection (5-7 years), whereas filling is a short-term temporary maintenance treatment (1-2 years).
Modern Chinese crack sealing melters utilize a double-jacketed thermal oil kettle design coupled with automatic digital thermostatic controls. The diesel burner heats heat-transfer oil within the jacket, which indirectly heats the bitumen polymer mass while motor-driven vertical or horizontal agitators continuously sweep material off the inner tank walls to prevent localized overheating, charring, or polymer break-down.
Yes. Manufacturers like HEM Group specialize in OEM/ODM customizations. Bitumen distributors, chip sealers, and crack sealing systems can be engineered with custom subframes, mounting points, and hydraulic PTO drives compatible with international truck chassis brands including SINOTRUK, ISUZU, MAN, VOLVO, Mercedes-Benz, and FAW.
Equipped with high-efficiency Italian Riello or Beckett diesel burners combined with optimized heat exchange geometry, our kettles heat cold polymer rubberized bitumen blocks to application temperature (185°C to 195°C) within 35 to 45 minutes from a cold start, maximizing daily field productivity.
Our crack routing machinery features electric or electro-hydraulic depth adjustment controls mounted directly on the operator handle. Operators can adjust cutting depth from 0 to 30mm on-the-fly while maintaining precise line tracking along irregular crack paths, protecting subbase integrity.
HEM Group equipment is certified under ISO 9001:2015 Quality Management Standards and CE Certification for European safety compliance. Sealant application systems are designed to process sealants conforming to international standards including ASTM D6690, AASHTO M324, and EN 14188-1.
Comprehensive fleet machinery including walking excavators, aggregate crushers, smart asphalt sprayers, and soil stabilization spreaders.
HME Machinery
