When Bonsal American introduced the Sakrete U.S. Cold Patch at the National Pavement Expo (NPE) in 2009, the product represented a step forward in cold asphalt patching technology. The demonstration at the Amguard/GemSeal booth gave attendees a look at a ready-to-use, recycled cold asphalt material designed for permanent patching of potholes, cracks, and other blacktop surface defects. Understanding how How Hma Plants Can Boost Revenue With Cold patch production partnerships can expand contractor capabilities is important for any pavement maintenance professional. This article examines the technology behind cold patch asphalt, the lessons demonstrated at NPE 2009, and the implications for contractors seeking durable pavement repair solutions.
The Sakrete Cold Patch Product Launch at NPE 2009
The National Pavement Expo has long served as a platform where manufacturers showcase innovations in pavement maintenance. In February 2009, Sakrete Product Manager Bob Schmidt presented the new Sakrete U.S. Cold Patch to attendees at the Amguard/GemSeal booth. The demonstration compared the new cold patch formulation directly against Sakrete existing Blacktop Patch product.
Key Features Highlighted in the Demonstration
The demonstration focused on several distinguishing characteristics of the new cold patch. Bob Schmidt walked attendees through the physical properties and performance differences that set the U.S. Cold Patch apart from conventional patching products.
- Reduced oil content: The new formulation contained significantly less oil than the existing Blacktop Patch, improving workability and reducing mess
- Ready-to-use formulation: The material required no mixing, heating, or special preparation
- Instant set capability: The cold patch could be driven on immediately after installation, minimizing traffic disruption
- Recycled material content: The product incorporated recycled asphalt, reducing its environmental footprint
- Reduced VOC emissions: Lower volatile organic compound levels compared to traditional cold patch alternatives
Live Comparison Testing
A central element of the demonstration was the side-by-side comparison between the new U.S. Cold Patch and the existing Blacktop Patch. Schmidt showed how the two materials differed in workability and handling. The new formulation was visibly less oily and easier to work with, while providing the immediate compaction and traffic-ready performance that contractors demand on active roadway repairs.
Trade shows like NPE serve an important educational function by giving contractors the opportunity to see products in action before making purchasing decisions. Understanding How Construction Trade Shows Educate Builders On Product specification and industry standards is essential for professionals who want to stay current with evolving material technologies.
How Cold Patch Asphalt Technology Works
Cold patch asphalt materials are designed to provide permanent pavement repairs without the need for hot mix equipment or specialized application machinery. The technology behind products like the Sakrete U.S. Cold Patch relies on a combination of aggregate selection, binder formulation, and additive chemistry to create a material that remains workable in storage yet sets quickly once compacted into a repair cavity.
Composition and Material Properties
Cold patch materials consist of aggregate blended with a specially formulated liquid binder that remains pliable at ambient temperatures. The binder system is the key differentiator between products. Traditional cold patch materials rely on cutback asphalt, where petroleum solvents are added to reduce viscosity. The Sakrete U.S. Cold Patch formulation minimized solvent content while maintaining adequate workability, resulting in lower VOC emissions and improved environmental performance.
Performance Characteristics
Contractors evaluating cold patch products should consider the following performance properties:
- Workability: The material must be easy to handle and place within the repair area without specialized tools
- Cohesion: Once compacted, the patch must hold together under traffic loads without raveling or separating from the pavement edge
- Adhesion: The material must bond effectively to the existing pavement walls to prevent water infiltration and edge failure
- Durability: The repaired area must withstand freeze-thaw cycles, traffic loading, and environmental exposure
- Shelf life: The material must remain usable after extended storage for emergency repairs
Comparison to Hot Mix Asphalt and Traditional Blacktop Patch
Understanding how cold patch compares to hot mix and traditional blacktop patch materials helps contractors select the right product for each repair scenario.
| Property | Hot Mix Asphalt | Traditional Cold Patch | Sakrete U.S. Cold Patch |
|---|---|---|---|
| Application temperature | 250-350 F, requires plant heating | Ambient, no heating required | Ambient, no heating required |
| Equipment needed | Hot mix plant, paver, roller | Hand tools, plate compactor | Hand tools, plate compactor |
| Set time | Cools and sets within hours | Settles over days to weeks | Sets instantly, traffic-ready same day |
| Oil content | Moderate, varies by mix design | High, significant residual oil | Reduced, less oily |
| VOC emissions | Moderate during placement | High from solvent evaporation | Reduced, lower solvent content |
| Shelf stability | Must be used same day | Months in sealed containers | Months in sealed containers |
| Recycled content | Varies by region | Limited | Recycled asphalt content |
| Sealability | After curing | Requires extended waiting | Sealable same day |
The Sakrete U.S. Cold Patch addressed several limitations of traditional cold patch, particularly in oil content reduction and instant set capability. The NPE demonstration showed that a well-formulated cold patch could approach the performance of hot mix while retaining the convenience of a stockpile material.
Practical Applications for Pavement Maintenance Contractors
Cold patch materials serve a critical role in pavement maintenance programs, particularly for emergency repairs, small-scale patching, and locations where hot mix availability is limited.
Pothole Repair Procedures
The following procedure represents industry best practices for achieving durable pothole repairs with cold patch asphalt:
- Remove all loose debris, water, and deteriorated pavement from the repair area. The cavity should have clean, vertical edges
- Apply the cold patch material, filling approximately one-third more than cavity depth to account for compaction
- Spread the material evenly using a lute or shovel, ensuring complete contact with cavity walls
- Compact using a vibratory plate compactor, starting from the outer edges toward the center
- Fill low spots with additional material and re-compact until the patch is slightly crowned
- Open to traffic immediately after compaction is complete
Edge Repairs and Utility Cut Restorations
Pavement edges that have deteriorated from traffic loading or water infiltration can be restored using cold patch. Utility cuts and service trench restorations also benefit from cold patch when immediate traffic restoration is required. The ability to apply at ambient temperatures and open repairs immediately makes cold patch ideal for emergency situations where hot mix is not available.
Best Practices for Cold Patch Application
- Surface preparation: Remove all loose debris, standing water, and deteriorated material. Clean, dry cavity walls improve adhesion
- Proper compaction: Use mechanical compaction equipment. Hand tamping is inadequate for long-term durability
- Traffic management: Avoid directing heavy truck traffic onto fresh repairs for several hours when possible
- Temperature: Cold patch performs best in dry conditions above freezing. Application in wet conditions reduces bond strength
- Storage: Keep cold patch in sealed containers or covered stockpiles. Moisture degrades the binder
Environmental and Economic Benefits of Recycled Cold Patch
The introduction of the Sakrete U.S. Cold Patch at NPE 2009 coincided with growing industry awareness of environmental sustainability. The product recycled asphalt content and reduced VOC formulation addressed two trends: reducing waste sent to landfills and complying with increasingly stringent air quality regulations.
VOC Reduction and Environmental Compliance
Traditional cold patch materials rely on significant quantities of petroleum solvents to keep the binder liquid at ambient temperatures. These solvents evaporate during and after application, releasing VOCs. The Sakrete Cold Patch formulation reduced solvent content while maintaining adequate workability, achieving lower VOC emissions without sacrificing performance. This reduction is particularly important for contractors working in regions with air quality regulations that restrict VOC emissions from construction materials.
Recycled material content offers additional environmental benefits. The use of reclaimed asphalt pavement reduces demand for virgin aggregate and binder materials. Understanding how Worlds Top Concrete Product Manufacturers approach material sustainability provides useful context for evaluating the environmental credentials of asphalt patching products.
Cost Efficiency for Maintenance Operations
- Reduced equipment costs: No need for hot mix plant access or specialized paving equipment
- Lower labor requirements: A two-person crew with basic hand tools and a plate compactor can complete repairs
- Emergency capability: Stockpiled material allows immediate response to pothole damage, preventing further deterioration
- Reduced waste: Unused material can be stored for future use, unlike hot mix
- Seasonal flexibility: Cold patch can be applied when hot mix plants are closed for the season
Material Specifications and Quality Standards
Contractors evaluating cold patch products should look for materials that meet established specifications. The Sakrete demonstration highlighted the importance of standardized testing and quality assurance. Understanding how Product Category Rules Concrete Masonry Units Pcrs Epds apply to building material specification helps contractors evaluate the documentation that reliable manufacturers provide for their products.
Storage and Inventory Management
The Sakrete U.S. Cold Patch was available in 50-pound bags and bulk, giving contractors flexibility in inventory management. Bagged materials should be stored in a dry location, stacked off the ground, and used on a first-in, first-out basis. Bulk stockpiles should be covered and placed on a paved surface to prevent contamination. With proper storage, high-quality cold patch materials can remain viable for six months or longer.
The product demonstration at NPE 2009 showed that cold patch technology had evolved significantly from the oily, slow-curing materials many contractors had experienced. The Sakrete U.S. Cold Patch prioritized workability, environmental performance, and rapid return to service without compromising durability. For contractors evaluating cold patch options, the lesson from the 2009 demonstration remains relevant: the best materials balance immediate handling characteristics with long-term performance. The combination of reduced oil content, recycled materials, lower VOC emissions, and instant set capability made this product a notable advancement in cold patching technology.