High-performance pavement rehabilitation machinery engineered for high-throughput heavy-duty highway applications.
Transforming Pavement Preservation through Polymer-Modified Emulsions, Precise Aggregate Gradation, and High-Yield Equipment Technology.
Microsurfacing is an advanced polymer-modified cold-mix paving technology designed to extend pavement service life, restore surface friction, seal structural micro-cracks, and correct wheel rutting up to 38 mm (1.5 inches) deep. Unlike conventional hot-mix asphalt (HMA) resurfacing or basic slurry seals, microsurfacing uses a specialized mixture of polymer-modified cationic emulsified asphalt (typically CQS-1h or LMCQS-1h), 100% crushed high-hardness mineral aggregate, mineral filler (Portland cement or hydrated lime), water, and chemical break-control additives.
The resulting chemical reaction causes the mix to set rapidly without relying solely on thermal evaporation. This unique cold-mix chemical break mechanism allows traffic restoration within 45 to 60 minutes under standard ambient conditions, making it an essential solution for high-volume highways, urban expressways, and airport runways.
Highway authorities and civil engineering contractors globally are shifting from reactive reconstruction to proactive Pavement Preventive Maintenance (PPM). Industrial microsurfacing provides significant cost advantages over total mill-and-overlay procedures:
| Pavement Preservation Method | Typical Thickness | Curing Time to Traffic | Rut Filling Capability | Expected Lifespan | Relative Cost Index |
|---|---|---|---|---|---|
| Polymer Microsurfacing (ISSA A143) | 6 mm - 12 mm | 45 - 60 Minutes | Up to 38 mm (Rut Box) | 6 - 8+ Years | Medium-Low (1.0x) |
| Conventional Slurry Seal (ISSA A105) | 3 mm - 6 mm | 3 - 8 Hours | Not Suitable (Minor fills < 3mm) | 3 - 5 Years | Low (0.7x) |
| Chip Seal (Synchronous Surface Dressing) | 10 mm - 15 mm | 2 - 4 Hours | None | 4 - 6 Years | Low (0.8x) |
| Hot Mix Asphalt (HMA) Overlay (40mm) | 40 mm - 50 mm | 4 - 6 Hours | Excellent (Via Milling/Paving) | 10 - 12 Years | High (3.5x - 4.2x) |
HEM Group integrates automated proportional control, high-torque twin-shaft mixing, and real-time electronic metering to guarantee uniform slurry consistency.
Precision is vital in micro-surfacing chemistry. Our slurry seal and microsurfacing pavers feature closed-loop hydraulic metering systems synced via CAN-bus controllers. The aggregate feed rate, asphalt emulsion pump displacement, water flow meter, and additive injection pump adjust dynamically to speed changes, maintaining strict mix tolerance (±0.5%).
Equipped with wear-resistant Ni-Hard alloy mixing paddles, the continuous twin-shaft pugmill forces immediate homogeneous blending of aggregates, mineral filler, emulsion, and liquid additive. This eliminates un-coated aggregate streaks and prevents premature emulsion break inside the mixing chamber.
Our micro-surfacing box incorporates twin augers for even lateral distribution of high-viscosity slurry across the full paving width (2.5m to 4.2m). Hydraulic screed strike-off seals deliver clean joint alignment and optimal macrotexture without surface tearing.
HEM Group was founded by a group of professors from Chang'an University (China's leading highway engineering research institution) and senior road building industry experts in 1998, initially named Xi'an Hongda Communications Technology Co., Ltd. It stands as one of the earliest high-tech enterprises focusing on independent R&D and manufacturing of specialized road construction and pavement maintenance machinery in China.
In 2006, HEM Group was officially recognized as a "High-Tech Enterprise" by the Shaanxi Provincial Department of Science and Technology. Driven by advanced mechanical dynamics, engine power matching, hydraulic transmission, and digital electronic control research, the group launched HME TOP Machinery Equipment Co., Ltd. in 2017 to manage global export operations, international technical exchanges, and global engineering field support.
More than 20 to 30 years of OEM factory supply capability, tailoring chassis and tank configurations for complex site demands.
Comprehensive guidance on asphalt emulsion chemistry, aggregate testing, and micro-surfacing batching formulas.
Distribution teams & hubs in Russia, Malaysia, South Africa, Uzbekistan, Ghana, Kenya, Indonesia, and Sri Lanka.
Round-the-clock remote troubleshooting and rapid deployment of spare parts to eliminate machine downtime.
See HEM TOP equipment performing high-yield paving and road maintenance across challenging global environments.
HME TOP Machinery Equipment Co. Ltd is a leading R&D, manufacturing, and export enterprise specializing in high-performance road construction equipment and mining machinery. Integrated since 2005, our operations bridge scientific research with factory floor precision.
Our complete road maintenance product chain includes milling machines, intelligent bitumen distributors, asphalt pavers, chip sealers, slurry seal / micro-surfacing machines, road wideners, and paver feeders, alongside crushers, screening machinery, and earthmoving loaders.
Exported to over 60 countries: India, Sri Lanka, Indonesia, Nigeria, South Africa, Eritrea, Mozambique, Congo, Australia, Fiji, Bolivia, and beyond.
Wheel loaders, excavators, backhoe loaders, and graders designed for bridge, tunnel, seaport, industrial park, and real estate civil projects worldwide.
Complete machinery chains including asphalt mixing plants, micro-surfacing pavers, synchronized chip sealers, milling machines, and vacuum sweeping units.
Mobile primary screening stations, jaw crushers, and cone crushing plants supporting quarry operations and aggregate grading for micro-surfacing jobs.
Strategic considerations for international contractors, tender authorities, and fleet managers procuring microsurfacing machinery from China.
When procuring micro-surfacing slurry pavers, international buyers must analyze total lifetime operational costs. HEM Group machines optimize TCO through three design pillars:
Navigating global logistics demands robust protective preparation and documentation compliance:
Rigorous physical and chemical laboratory benchmarks ensuring long-term pavement adhesion and shear resistance.
Compliant with ISSA TB-100. Measures long-term aggregate loss under underwater wearing simulation. Maximum allowable loss < 538 g/m².
Compliant with ISSA TB-109. Determines maximum sand adhesion to prevent excess bitumen flushing/bleeding under heavy wheel loads (< 538 g/m²).
Compliant with ISSA TB-139. Verifies early set torque limits: 12 kg-cm minimum at 30 min (traffic opening readiness capability).
Compliant with ISSA TB-144. Tests compatibility between specific polymer modified emulsified asphalt binders and candidate aggregate mixes.
Explore our full line of specialized pavement markers, asphalt plants, excavators, and road wideners.
Snapshots of our 5,000m² manufacturing facility, R&D labs, and international partner network.
Expert answers regarding microsurface machine procurement, mix chemistry, project execution, and factory support.
HME Machinery
