Cold Mix Asphalt Binder System
Rapid, high-strength pavement repair
Urethane-modified cold mix asphalt (CMA) provides a fast, high-performance solution for repairing damaged pavements in various settings. The Cold Mix Asphalt Binder System uses a two-part binder that combines a urethane-modified asphalt premix (Part A) with an activator (Part B), which is mixed on-site with construction aggregate to create a durable CMA. Once mixed and compacted, the material is strong enough to support heavy traffic, such as fully loaded F-15E aircraft, within two to four hours of placement.
No heating or specialized equipment is required; the mix can be prepared and applied in the field using standard tools like shovels and buckets. Designed for rapid deployment, shelf stability, and minimal curing time, the composition of this CMA enables effective road and airfield repairs even in environments with limited resources. Compared to traditional CMAs, this technology offers superior rut resistance, durability, and early strength development, rivaling or exceeding the performance of conventional hot mix asphalt.
Maintaining asphalt roads using hot mix asphalt requires the material to be mixed at a plant, stored, transported, then applied using specialized equipment, which limits its usability to certain locations. Alternatively, conventional CMA can be stored and applied without special equipment, making it ideal for patching potholes and other temporary road repairs especially in settings with limited access to heat, energy, and stabilizing materials. However, CMA suffers from low early strength, long curing times, and high moisture susceptibility. To overcome these limitations, researchers developed enhanced CMA that improves strength and resilience while still not requiring specialized equipment.
Benefits:
- Rapid readiness: Full strength and ready for traffic in just 2-3 hours
- Simplified application: Can be mixed and applied on-site using basic tools
- Superior performance: Outperforms conventional CMA in strength and durability
Applications:
- Airfield damage repair
- Remote road maintenance
- Emergency infrastructure repair
Patents
- 20250092260 (Search patent)