Direct OEM Factory Supply for Global Infrastructure & Pavement Preservation Projects
Redefining Global Pavement Preservation with Low-Carbon, All-Weather OEM Engineering
In the modern paradigm of civil infrastructure engineering, traditional hot-mix asphalt (HMA) applications face severe economic, environmental, and operational bottlenecks. High fuel consumption during thermal blending, significant greenhouse gas (GHG) emissions, elevated transport logistics costs, and strict ambient temperature application windows have driven municipal transit authorities and industrial contractors toward advanced Cold Mix Asphalt (CMA) and Cold Mix Premix formulations. Engineered as an instantly deployable, high-tenacity aggregate-binder composite, cold mix premix eliminates thermal heating requirements, drastically reducing Scope 1 and Scope 2 carbon footprints while offering all-weather road repair capabilities.
As premier OEM Cold Mix Premix Manufacturers & Factories, industrial partners must deliver not merely off-the-shelf chemical binders or standard aggregates, but fully integrated material and equipment ecosystems. Modern cold mix solutions rely on precisely engineered cationic asphalt emulsions, specialized workability solvents, reactive anti-stripping additives, and high-quality graded mineral aggregates. Supported by robust manufacturing technology—including automated bitumen emulsification plants, precision dosage systems, and heavy-duty milling and paving machinery—OEM suppliers form the backbone of modern pavement maintenance worldwide.
| Performance Metrics | Traditional Hot Mix Asphalt (HMA) | Standard Cutback Cold Mix | Advanced OEM Polymer Cold Mix Premix |
|---|---|---|---|
| Application Temp. Range | 140°C – 170°C (Requires Heating) | 0°C – 30°C (Moderate) | -25°C to 50°C (All-Weather Instant Use) |
| Storage Stability / Shelf Life | Use Immediately (Hours) | 1 – 3 Months | 12 – 24 Months (Bagged or Bulk Stockpile) |
| Environmental Impact | High Carbon Footprint & Fumes | High VOC Evaporation | Zero Thermal Emissions / Low-VOC Formulations |
| Marshall Stability (kN) | 8.0 – 12.0 kN | 3.5 – 5.0 kN | 8.5 – 14.0 kN (Industrial Grade) |
| Water Resistance & Stripping | Moderate (Temperature Dependent) | Poor to Moderate | Superior (Polyamide Anti-Stripping Agent) |
Founded by Chang'an University Professors & Senior Highway Engineering Experts in 1998
HEM Group was established in 1998 (originally Xi'an Hongda Communications Technology Co., Ltd.) by a distinguished collective of academic professors from Chang'an University—China's premier institution for highway engineering, vehicle dynamics, and pavement material science. From its inception, HEM Group was engineered as a high-tech enterprise dedicated to bridging fundamental mechanical chemistry research with heavy industrial manufacturing.
Over two decades of rigorous scientific innovation have yielded numerous state invention patents and technical breakthroughs across mechanical dynamics, engine power matching, high-shear hydraulic transmission, digital electronic metering control, and specialized polymer bitumen chemistry. Recognized as a certified "High-Tech Enterprise" by the Shaanxi Provincial Department of Science and Technology in 2006, HEM Group maintains an authoritative leadership position in global road maintenance machinery and bitumen plant manufacturing.
To deliver seamless global trade, localized engineering assistance, and export compliance, HEM Group founded its dedicated international export arm, HME TOP Machinery Equipment Co., Ltd. in 2017. HME TOP integrates international logistics, technical consultation, field commissioning, and spare parts supply across more than 60 countries and regions worldwide.
High-Performance Bitumen Emulsion Chemistry, Aggregate Skeleton Design & OEM Plant Architecture
Superior cold mix performance requires high-shear colloidal emulsification. OEM binders incorporate Styrene-Butadiene-Styrene (SBS) or Styrene-Butadiene Rubber (SBR) latex, combined with specialized organo-silane coupling agents and polyamide anti-stripping compounds. This ensures cationic charge compatibility with acidic siliceous aggregates, guaranteeing 100% bitumen coating and zero stripping under heavy moisture exposure.
Cold mix premix structural integrity relies on stone-on-stone skeletal contact. Our material formulations utilize crushed basalt, granite, or limestone aggregate matrices adhering to strict ASTM C136 and EN 933 grading curves. By maintaining optimized air void distributions (3% to 6% post-compaction), the premix achieves immediate load-bearing capacity upon compaction without rutting or bleeding.
Achieving a 24-month stockpile shelf-life without premature hardening demands precise fluxing agent kinetics. OEM formulas leverage bio-based fatty acid methyl esters (FAME) or specialized low-VOC petroleum distillates. These solvents keep the binder liquid during packaging and storage, but volatilize or chemically react rapidly once compacted under traffic load, curing into a rigid asphalt matrix.
Producing cold mix premix on an industrial scale requires seamless synchronization between chemical binder preparation and mechanical aggregate blending. As full-spectrum machinery and plant manufacturers, HEM Group provides turnkey OEM plant installations configured for high-volume cold mix production:
Our automated asphalt emulsification units utilize precision German-engineered colloid mills capable of producing droplet sizes under 3 microns. This ultra-fine particle distribution guarantees emulsion stability during extended transport and high shear resistance during aggregate mixing.
Featuring dual-shaft counter-rotating paddle mixers equipped with variable-frequency drives (VFD) and automated liquid injection nozzles, our plants ensure uniform binder dispersion without crushing sensitive aggregate fractions.
Streamlined Solutions for Municipal Departments, OEM Distributors & Highway Maintenance Concessionaires
To serve diverse procurement channels, OEM Cold Mix Premix is manufactured in multiple supply formats: vacuum-sealed 20kg/25kg UV-resistant polypropylene bags for retail and municipal rapid response units, 1-ton bulk bags (FIBC) for regional depots, and bulk loose delivery for major roadway paving projects.
Every production batch undergoes stringent laboratory validation in accordance with AASHTO, ASTM, and EN standards. Quality control parameters include Marshall Stability testing (>9 kN), Hamburg Wheel Tracking for rut depth analysis (<4mm at 10,000 passes), and 5-day water immersion storage stability testing.
Export logistics are optimized through moisture-proof barrier lining, palletization with shrink-wrap stabilization, and containerized freight configuration. HME TOP Machinery manages full export documentation, phytosanitary checks, customs clearance, and multi-modal transit to over 60 global ports.
OEM Cold Mix Premix is engineered for high-durability performance across a wide array of civil infrastructure repair scenarios:
Instant repair of deep asphalt potholes and utility trench cuts without requiring tack coats or heavy rollers. Can be compacted using hand tampers or small vibratory plates.
High-adhesion patching for concrete bridge decks and airport taxiways where rapid curing is required to reopen traffic lanes within minutes.
Precision filling of degraded pavement edges and shoulder drops, preventing dangerous edge drop-offs on rural highways.
Flexible surrounding matrix for utility manhole frames and bridge expansion joints capable of absorbing continuous thermal expansion and heavy axle vibration.
Unmatched OEM Capability, Technical Support, and Global Infrastructure Partnerships
Direct academic engineering heritage from Chang'an University ensuring cutting-edge material chemistry and machine dynamics.
We do not just sell machines; we supply local aggregate testing, bitumen emulsion chemical formulas, and batch mixing protocols.
Tailor-made machinery specifications including specialized paving widths, automated digital metering systems, and custom chassis integration.
Dedicated engineers, rapid spare parts dispatch, and regional service hubs across Russia, South Africa, South America, Southeast Asia, and the Middle East.
Our road maintenance machinery and bitumen plants are actively operating in over 60 countries, including India, Sri Lanka, Indonesia, Nigeria, South Africa, Eritrea, Mozambique, Congo, Australia, Fiji, Bolivia, Russia, Uzbekistan, and beyond.
Next-Generation Bio-Binders, Autonomous Paving Technology, and Carbon Reduction Solutions
Research and development teams at HEM Group are actively pioneering bio-renewable fluxing agents derived from agricultural by-products. These bio-binders replace volatile organic compounds (VOCs) entirely, reducing atmospheric toxicity while facilitating 100% recycling of Reclaimed Asphalt Pavement (RAP) in cold-mix operations.
Modern road maintenance machinery manufactured by HEM Group incorporates real-time radar speed sensors, closed-loop electro-hydraulic flow control, and cloud-based telematics. This guarantees precision binder application rates within ±1% accuracy, eliminating material waste and ensuring consistent structural bonding.
By eliminating aggregate drying burners standard in hot-mix asphalt plants, OEM Cold Mix Premix production cuts CO2 emissions by up to 80-90 kg per metric ton. This massive carbon reduction enables civil contractors to secure green building credits (LEED, BREEAM) and trade carbon offsets under international environmental protocols.
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