Expandable Anode Assembly for Reinforced Concrete
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Solution Overview
Problem
Existing anode assemblies for reinforced concrete structures face challenges such as difficulty in installation, limited durability, susceptibility to contaminants, and inconsistent contact with the concrete surface due to varying gap sizes and damage during installation.
Innovation Solution
An expandable anode assembly with a compressible material sealed in a flexible enclosure, allowing the anode to expand and maintain contact with the concrete surface, even if the enclosure is damaged, and accommodating varying gap sizes by adjusting the number of assemblies and their expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inflatable anode assembly is used to maintain contact with concrete, then the anode can adapt to gap variations, but the deformable material is susceptible to damage and corrosion causing loss of contact
Solution Approach 1:
The patent changes the physical state of the expandable member from inflatable (gas-filled) to compressible solid material (foam). This allows the member to be compressed during installation and then expand autonomously through material recovery, eliminating the need for gas management systems and reducing susceptibility to degradation from fluid leakage.
Solution Approach 2:
The compressible material is designed as a self-contained, non-reusable component that is compressed during installation and then permanently expands to its operational volume. This disposable approach eliminates the need for complex recovery mechanisms and reduces long-term maintenance concerns.
2Ease of operation
If anode assemblies are forcibly inserted into gaps, then installation is achieved, but the risk of damage during installation increases
Solution Approach 1:
The expandable member is pre-compressed during manufacturing and packaging, creating a compact form factor that can be easily inserted into gaps. After insertion, the member autonomously expands to its operational volume, eliminating the need for forceful insertion and reducing damage risk.
Solution Approach 2:
The anode assembly transitions from a static, rigid structure to a dynamic system where the expandable member changes volume from compressed to expanded state. This dynamic behavior allows the assembly to adapt to gap variations and reduces installation forces required.
3Adaptability or versatility
If the deformable material is used in the anode assembly, then the anode can expand to contact concrete, but the material is susceptible to attack by contaminants
Solution Approach 1:
The patent changes the material state from inflatable (gas-filled deformable material) to compressible solid (foam). This eliminates the fluid barrier that is susceptible to contaminant attack, while the foam material itself is inherently resistant to degradation from road contaminants.
Solution Approach 2:
The expandable member is constructed from composite foam materials that combine compressibility for gap adaptation with inherent chemical resistance to contaminants. The foam structure provides both the necessary deformation capability and protection against environmental factors.
4Manufacturing precision
If anode assemblies are made to fit specific gap sizes, then the design is optimized for that gap, but the ability to accommodate varying gap sizes is limited
Solution Approach 1:
The anode assembly incorporates a dynamic expandable member that can change volume from compressed to expanded state. This allows a single standardized assembly design to accommodate varying gap sizes, as the member expands to match the specific gap dimensions during installation.
Solution Approach 2:
The compressible expandable member serves multiple functions: it acts as both the structural support and the gap-adaptation mechanism. A single universal assembly design can be used across different gap sizes, eliminating the need for multiple specialized designs.
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
Facilitates easy installation, enhances durability by protecting against contaminants, and ensures consistent contact with the concrete surface over extended periods, accommodating gaps of any size and reducing storage and transportation costs.
Implementation Method 1
a compressible material sealed in a flexible enclosure, allowing the anode to expand and maintain contact with the concrete surface
Data Source
AI summary
An array of anode assemblies for insertion at a plurality of locations in a gap between a section of a reinforced concrete structure and another solid structure is provided. Each anode assembly comprises an expandable member, an anode attached to the expandable member for protecting a steel reinforcement in the reinforced concrete structure, and an anode connector for interconnecting the array of anode assemblies. During use, each anode assembly of the array of anode assemblies is inserted into the gap, between the section of the reinforced concrete structure and the solid structure, at the plurality of locations. The expandable member of each anode assembly is configured to expand so as to press the anode into contact with a surface of the reinforced concrete structure.