Cold-Patch Asphalt Using Recycled Oil Binder
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Solution Overview
Problem
Traditional asphalt patching compounds are difficult to apply, expensive to manufacture, and often fail due to lack of water repellency and pliability, leading to traffic interruptions and ineffective repairs.
Innovation Solution
A cold-patch asphalt composition made from recycled materials, primarily bituminous material and an oil binder, which is mixed and applied without heat, using a ratio of ground particulate bituminous material to oil binder that forms a unitary pliable material under pressure, allowing for quick and efficient repair with minimal traffic disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hot-patch asphalt compounds are used, then the patching material can fill cracks effectively, but the application process requires heat and specialized equipment, causing traffic interruptions and increased complexity
Solution Approach 1:
The invention changes the temperature parameter from hot (traditional asphalt) to cold (ambient temperature application). The cold-patch compound is formulated to remain pliable at ambient temperatures through specific binder compositions, eliminating the need for heating equipment and allowing direct application to cracks while maintaining effective filling properties.
Solution Approach 2:
The invention replaces the thermal system (heating equipment, hot application) with a mechanical system (cold application, manual or mechanical placement). The compound achieves crack filling through mechanical placement and compaction rather than thermal flow, eliminating specialized heating equipment and simplifying the application process.
2Reliability
If traditional patching compounds with multiple ingredients are used, then the composition can achieve desired properties, but the manufacturing process becomes expensive and time-consuming
Solution Approach 1:
The invention uses recycled asphalt pavement (RAP) material with locally varying properties rather than requiring uniform virgin materials. The cold-patch compound accepts variations in RAP composition and particle size distribution, eliminating the need for precise ingredient control and reducing manufacturing complexity while maintaining adequate performance.
Solution Approach 2:
The invention creates a composite material using recycled asphalt pavement particles bound with a specialized binder. This composite approach allows the use of variable-quality recycled materials while the binder system ensures cohesive performance, reducing reliance on multiple precisely-controlled ingredients and simplifying manufacturing.
3Ease of manufacture
If traditional patching compounds are used, then the material can be applied to road surfaces, but the compounds fail to repel water and remain pliable, leading to cracking under thermal and moisture exposure
Solution Approach 1:
The invention changes the chemical composition parameters of the binder to achieve both water repellency and pliability retention. The specialized binder system includes hydrophobic components that repel water while maintaining flexible bonding properties, preventing the cracking that occurs with traditional compounds exposed to moisture and temperature cycles.
Solution Approach 2:
The invention uses cost-effective recycled materials that provide adequate performance for the application lifecycle. The cold-patch compound is designed for specific service conditions and can be reapplied when needed, providing economical durability without requiring expensive premium materials that promise indefinite service life.
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 composition is cost-effective, easy to transport and apply, and remains pliable and effective in various weather conditions, reducing the need for external heat and minimizing traffic interruptions during application.
Implementation Method 1
Use of used motor oil, having a viscosity otherwise lower than the corresponding new motor oil, may be advantageous because it penetrates and/or is absorbed by the particles better than the new oil.
Implementation Method 2
mixing the ground particulate bituminous material with the oil binder to form a mixture comprising oil-coated ground particulate bituminous material
Implementation Method 3
The mixture can form a unitary pliable material in response to an applied pressure of, for example, about 50 PSI (about 345 kPa) to about 150 PSI (about 1034 kPa) or more.
Data Source
AI summary
An asphalt cold-patch compound composition and method are disclosed. The compound can include bituminous material and an oil binder mixed according to a ratio. For example, recycled roofing shingles and used motor oil can be mixed according to a ratio of about 9:1 to about 20:1. The compound is suitable for patching surfaces, such as roads, and can be placed in service without heating. The asphalt cold-patch compound can be made from recycled materials and can be applied without specialized heating equipment.