Polyurethane Foam Surface Repair Composition
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Solution Overview
Problem
Existing repair processes for deteriorated asphalt and concrete surfaces, including those around manholes, are expensive, ineffective, and lack long-term durability, often requiring costly equipment and labor with inadequate strength and adhesion properties.
Innovation Solution
A surface composition comprising a liquid binder, catalyst, and primer that undergoes an internal exothermic reaction to rapidly cure, providing a durable, waterproof, and long-lasting repair solution for roadway voids and manhole structures, which can be applied using conventional equipment and techniques, reducing repair time and increasing the lifespan of the repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional repair materials (cold-patch asphalt, hot-patch asphalt, oil, tar) are used to fill roadway voids, then the repair cost is low, but the repair effectiveness, durability, and adhesion are inadequate
Solution Approach 1:
The patent changes the chemical and physical parameters of the repair material by using a two-part polyurethane system (isocyanate and polyol) that undergoes exothermic chemical reaction to form a rigid foam. This transformation from simple bituminous materials to reactive polymer systems fundamentally improves adhesion, strength, and durability while maintaining cost-effectiveness through efficient material utilization and reduced labor requirements
Solution Approach 2:
The invention creates a composite repair material consisting of polyurethane foam embedded with aggregates, fibers, and other additives. This composite structure combines the adhesive and expanding properties of polyurethane foam with the structural strength of aggregates and the reinforcement of fibers, achieving superior repair effectiveness that addresses both reliability and cost considerations
2Ease of operation
If special equipment and labor are used to apply conventional repair materials, then the repair can be performed, but the total cost becomes significant due to equipment, labor, traffic re-routing, and permits
Solution Approach 1:
The polyurethane foam exhibits self-service properties by expanding and self-leveling after application, eliminating the need for complex compaction equipment and extensive manual finishing. The material automatically fills voids and conforms to surrounding surfaces through its expanding foam structure, significantly simplifying the application process and reducing labor requirements while maintaining high repair quality
Solution Approach 2:
The patent utilizes the phase transition of polyurethane from liquid components to expanding foam during the exothermic reaction process. This phase change enables the material to automatically fill irregular voids and conform to complex geometries without requiring specialized application equipment, thereby improving ease of operation while reducing the time needed for repair completion and traffic re-routing
3Strength
If existing repair processes are used, then the initial repair can be completed, but the adhesion and strength properties remain inadequate according to ASTM standards
Solution Approach 1:
The patent replaces expensive, short-lived conventional repair materials with a cost-effective polyurethane foam system that provides long-term durability. The foam's ability to expand, adhere, and form a flexible bond with surrounding materials creates a repair solution that meets or exceeds ASTM standards for adhesion and elongation, significantly extending the service life of repairs while remaining economically viable
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces repair time and costs, enhances the durability and longevity of the repaired surfaces, and provides improved adhesion and resistance to temperature changes, moisture, and wear, making it a cost-effective alternative to traditional methods.
Implementation Method 1
The surface compositions may cure rapidly through an internal exothermic reaction process to form the repair and/or the safety flooring
Implementation Method 2
A surface composition comprising a liquid binder, catalyst, and primer that undergoes an internal exothermic reaction to rapidly cure
Data Source
AI summary
Various embodiments provide surface compositions and methods for repairing durable and/or load-bearing surfaces including roadway voids, manhole structures, and/or safety flooring. Compositions and methods may comprise utilizing a liquid binder, catalyst, and/or primer to provide durable, waterproof, and/or long-lasting surface compositions to dispose within the roadway voids and/or to coat flooring. The surface compositions may cure rapidly through an internal exothermic reaction process to form the repair and/or the safety flooring. In some embodiments, filler materials may be disposed within the liquid binders to provide elasticity, compression, slip resistance, heat transfer, reduced cure time, and/or a desired surface texture to the surface composition.