Standoff Cladding System for Concrete Structure Repair
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Solution Overview
Problem
Concrete structures, especially those with embedded reinforcement, face degradation due to corrosion and environmental factors, leading to compromised structural integrity, and there is a need for effective methods and apparatus to repair, restore, and protect these structures.
Innovation Solution
A method and apparatus involving standoff retainers, standoffs, and cladding panels are used to create a formwork system where a curable material is introduced between the panels and the existing structure, allowing it to cure and form a repair structure that enhances the structural integrity and protects against environmental damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If concrete structures are exposed to environmental factors and time, then structural degradation and corrosion occur, but repair and restoration capabilities are needed to maintain integrity
Solution Approach 1:
The patent applies preliminary action by installing protective coatings and corrosion inhibitors on reinforcement bars before concrete placement, and by providing detailed repair protocols to be executed at early stages of degradation. This prevents severe deterioration and maintains structural integrity throughout the extended service life of the structure.
2Strength
If repair structures are added to existing concrete structures, then structural integrity is enhanced, but the complexity of the repair process increases
Solution Approach 1:
The patent segments the repair process into distinct modular components: surface preparation, reinforcement installation, concrete placement, and curing stages. Each stage has specific protocols and quality checks, making the complex repair process manageable and systematic while enhancing structural strength through properly executed each segment.
Solution Approach 2:
The patent applies local quality by tailoring repair methods to specific degradation conditions and locations. Different repair techniques are specified for surface cracks, deep spalling, corrosion-damaged reinforcement, and structurally critical areas, optimizing strength restoration while managing complexity through localized rather than universal approaches.
3Strength
If reinforcement material is embedded in concrete, then structural strength is increased, but corrosion of the reinforcement material occurs over time
Solution Approach 1:
The patent applies preliminary anti-action by installing protective measures against corrosion before it can damage the reinforcement. This includes applying corrosion-inhibiting coatings, using epoxy-coated or galvanized reinforcement bars, ensuring proper concrete cover thickness, and controlling concrete mix design to minimize permeability. These preliminary protective actions prevent corrosion while maintaining the strength benefits of embedded reinforcement.
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 effectively repairs and reinforces concrete structures by creating a durable repair structure that addresses corrosion and environmental degradation, enhancing the structural integrity and providing protection against further damage.
Implementation Method 1
a curable material is introduced between the panels and the existing structure, allowing it to cure and form a repair structure
Data Source
AI summary
Methods are provided for repairing an existing structure to cover at least a portion of the existing structure with a repair structure. Such methods comprise mounting one or more standoff retainers to the existing structure; coupling one or more standoffs to the standoff retainers such that the standoffs extend away from the existing structure; coupling one or more cladding panels to the standoffs such that the panels are spaced apart from the structure to provide a space therebetween; and introducing a curable material to the space between the panels and the existing structure, the panels acting as at least a portion of a formwork for containing the curable material until the curable material cures to provide a repair structure cladded, at least in part, by the panels. Corresponding apparatus for effecting such methods are also provided.