Explore our top-tier export equipment range engineered for ultra-durability, extreme precision, and seamless highway maintenance operations globally.
Modern highway infrastructure faces unprecedented stresses from expanding traffic loads, extreme temperature fluctuations, and environmental degradation. Standard surface seal treatments often fail prematurely due to micro-delay voids—where binder cools before aggregate embedding occurs, resulting in severe aggregate loss, bleeding, and water ingress. As premier Synchronous Chip Sealer suppliers and factories, HEM Group delivers computerized, integrated mechanical systems that resolve these engineering bottlenecks at the mechanical dynamic level.
Equipped with ultra-fast hydraulic actuators and radar-guided pulse metering, our machines precisely synchronize the asphalt spray nozzles and aggregate discharge gates. The aggregate contacts the asphalt film while the binder is at maximum surface tension state, ensuring 100% bitumen envelope bonding.
Featuring dual diesel heating burners, automatic thermal fluid jacket circulation, and high-density rock wool insulation layers, our binder storage units maintain bitumen viscosity within strict engineering tolerances (±2°C) even in sub-zero alpine paving environments.
Individual air-cylinder controlled aggregate gates enable dynamic width adjusting on the fly. Paired with anti-segregation roller devices, chip dispersion achieves absolute spatial uniformity across widths up to 4.2 meters.
As smart transport systems and green construction standards redefine pavement engineering, our R&D roadmap focuses on four key technological vectors:
Future iterations of our Synchronous Chip Sealers incorporate real-time 3D LiDAR scanners mounted on the front bumper. These sensors analyze existing pavement macrotexture, rut depth, and crack severity millisecond by millisecond, automatically commanding the PLC system to dynamically increase binder dosage over porous zones and decrease binder application on slick, polished surfaces.
Addressing stringent global carbon mandates, HEM Group is pioneering hybrid and fully electric auxiliary drive systems for aggregate spreaders and bitumen pumps. Electric drive units eliminate hydraulic fluid contamination risks, reduce operational noise levels during night urban paving, and deliver 95% energy efficiency conversion.
With global specifications shifting toward crumb-rubber modified asphalt (CRMA) and bio-based emulsifiers, our fluid delivery systems are engineered with high-shear stainless steel pumps, anti-clogging self-cleaning filters, and specialized high-atomization nozzle tips to handle non-Newtonian viscous fluids effortlessly.
Integrated telematics stream live metrics—including application rates (kg/m²), bitumen temp, total covered square meters, material payload levels, and GPS position—directly to cloud management dashboards. Fleet operators gain full visibility, predictive maintenance alerts, and automated job site compliance reports.
HEM Group (originally founded as Xi'an Hongda Communications Technology Co., Ltd. in 1998) brings over two decades of rigorous academic and industrial leadership to the machinery market. Emerging from research partnerships with Chang'an University—China's elite academic institution for highway engineering—we bridge theoretical mechanical dynamics with industrial production capability.
Recognized as an official "High-tech Enterprise" by the Shaanxi Provincial Department of Science and Technology in 2006, our engineering teams possess dozens of core invention patents across mechanical dynamics, engine power matching, high-pressure hydraulic transmission systems, and digital electronic control systems.
In 2017, HEM Group established HME TOP Machinery Equipment Co., Ltd. as its dedicated export sales and technical service hub. This arm coordinates worldwide equipment logistics, international customs compliance, technical training, and global spare parts supply chains with zero friction.
Our Factory 4.0 complex employs robotic laser cutting centers, automated CNC machining centers, ultrasound weld flaw detectors, and full-vehicle dynamic testing tracks. Every chip sealer undergoes continuous 8-hour load testing under real-world hydraulic pressure and heat conditions before release.
Synchronous chip sealing is not a one-size-fits-all process. HEM Group offers bespoke machinery configurations adapted to diverse macroeconomic infrastructure mandates across continents:
For high-speed, heavy-axle freight highways, our high-output Synchronous Chip Sealers apply polymer-modified asphalt (SBS) along with pre-coated aggregate chips. This creates a stress-absorbing membrane interlayer (SAMI) that inhibits reflective cracking and restores high friction values (skid resistance) instantly.
In developing regions across Africa, Southeast Asia, and South America, budget constraints often prevent traditional hot-mix asphalt (HMA) paving. Our self-propelled and truck-mounted chip sealers enable low-cost, long-lasting single or double surface treatments over graded gravel bases, opening vital trade routes efficiently.
Taxiways and aprons demand strict foreign object damage (FOD) control and fuel resistance. Utilizing synchronized latex-modified emulsified asphalt spreading, our equipment provides impervious waterproofing seals that prevent moisture penetration into base subgrades.
For international contractors, mining conglomerates, and municipal public works departments, purchasing heavy road machinery is a multi-year capital commitment. HEM Group streamlines global B2B procurement through transparent engineering standards, custom OEM capabilities, and total cost of ownership (TCO) optimization.
We tailor chassis configurations, auxiliary engine choices (Cummins, Weichai, Deutz), tank capacities (from 6,000L to 16,000L), and aggregate hopper volumes to align with your country's axle load regulations and local aggregate sizing requirements.
To eliminate costly job site downtime, we utilize international standardized hydraulic components (Danfoss, Rexroth, Parker) alongside proprietary modules. Spare parts kits are dispatched within 24 hours from localized logistics hubs.
By optimizing burner fuel efficiency, reducing asphalt pump wear via thermal jacketing, and ensuring zero waste in material spreading through computer-controlled metering, our machines deliver ROI within 14 months of active project deployment.
HEM Group equipment operates seamlessly across diverse regulatory zones, climate conditions, and working environments in over 60 countries—including Russia, Malaysia, South Africa, Uzbekistan, Ghana, Kenya, Indonesia, Sri Lanka, Bolivia, and Australia.
All machinery conforms to European Union CE directives, ISO9001 Quality Management Systems, ISO14001 Environmental Standards, and EAC Eurasian Customs Union safety standards.
Our multi-lingual service engineers provide on-site machine commissioning, dynamic asphalt/aggregate calibration, and operator safety certifications directly at your construction base camp.
We manage all aspects of international trade logistics, including RO-RO shipping, flat-rack container packaging, customs documentation, and door-to-port delivery guarantees.
Beyond Synchronous Chip Sealers, HEM Group manufactures a complete chain of heavy equipment for earthmoving, asphalt paving, milling, crushing, and aggregate screening operations.
We engineer heavy-duty wheel loaders, hydraulic excavators, backhoe loaders, motor graders, and walking spider excavators designed for extreme mining, urban infrastructure, real estate development, and emergency rescue tasks.
Our paving line-up includes Asphalt Mixing Plants, Asphalt Pavers, Road Milling Machines, Cement Spreaders, Slurry Seal Pavers, Cold In-Place Recyclers (CIPR), and Bitumen Decanters trusted worldwide.
Robust mobile jaw crushers, mobile roller crushers, and mobile vibrating screens engineered to process raw quarry stone, river pebbles, and recycled concrete aggregates efficiently on site.
Expert answers to common engineering, operational, and purchasing inquiries regarding Synchronous Chip Sealers.
The primary advantage is synchronization time. Synchronous chip sealers apply hot bitumen (or emulsified binder) and aggregate chips simultaneously within a millisecond window (under 0.5s). This prevents the binder from cooling or forming a skin before aggregate drop, guaranteeing up to 40% superior aggregate adhesion, preventing chip loss, and extending pavement service life by years.
Our equipment handles hot modified bitumen (SBS/SBR), crumb rubber modified asphalt (CRMA), emulsified asphalt, cutback asphalt, and bio-binders. It accommodates aggregate chip sizes ranging from 3mm to 25mm, provided aggregates are clean, dry, and consistently graded.
The operator sets target binder spray rates (kg/m²) and chip spread rates (L/m²) via an intuitive touchscreen PLC terminal inside the cab. Radar speed sensors continuously track vehicle ground speed, and the PLC dynamically adjusts hydraulic pump speeds and pneumatic gate openings to maintain absolute rate precision, regardless of driving speed variations.
We provide a comprehensive 12-month (or 2,000-operating-hour) full machine warranty. Our international support includes 24/7 online technical assistance, remote diagnostics via telematics, fast dispatch of original spare parts, and on-site engineering support for setup and training in key global regions.
Yes. As a direct manufacturer with deep academic research capabilities, we customize spray bar widths, nozzle configurations, tank heating capacities, engine emission specs (Stage V, Tier 4, Tier 3), chassis brands, and operating software languages according to buyer specifications.
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