Grid-Reinforced Concrete Strengthening Without Adhesive Crack Repair
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Solution Overview
Problem
Existing concrete strengthening methods face limitations in fire resistance, corrosion prevention, and applicability to structures with limited working space or curved surfaces, particularly in infrastructure like tunnels and ports, due to issues with organic adhesives, weight, and complexity of installation.
Innovation Solution
A method using a grid reinforcement material, specifically a carbon fiber textile grid, mounted with a grid fixing device and filled with non-shrink grout to strengthen concrete structures, which automatically fills cracks and prevents corrosion, allowing for easy application on both flat and curved surfaces without the need for separate crack repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If organic adhesive is used to bond carbon fiber sheet to structure, then bonding strength is improved, but fire resistance deteriorates and toxic gas is generated
Solution Approach 1:
The patent removes the organic adhesive component from the strengthening system and replaces it with a mechanical bonding method using grout injection. The carbon fiber reinforcement is attached to the concrete surface and secured through grout injection holes, eliminating the need for organic adhesives that cause fire safety issues and toxic gas generation.
2Object-affected harmful factors
If textile reinforcement material is used with mortar spraying, then fire resistance is improved, but construction complexity increases
Solution Approach 1:
The patent extracts and removes the mortar spraying equipment and process from the construction system. Instead of using complex mortar spraying machinery and procedures, the invention employs a simpler grout injection method where grout is pumped through injection holes to secure the reinforcement material, significantly reducing construction complexity.
3Strength
If section enlargement is performed for strengthening, then load capacity is improved, but working space requirement increases
Solution Approach 1:
The patent uses thin carbon fiber reinforcement materials (sheets, fabrics, or grids) that can be applied directly to the existing concrete surface without requiring additional space for section enlargement. These thin reinforcement layers provide the necessary load capacity enhancement while maintaining the original structural dimensions and working space requirements.
4Strength
If carbon fiber sheet is bonded using adhesive, then strengthening effectiveness is improved, but applicability to curved surfaces deteriorates
Solution Approach 1:
The patent employs reinforcement materials with high flexibility and adaptability that can conform to curved and irregular surfaces. The grout injection method allows the reinforcement to be securely attached to complex geometries without requiring flat surfaces, enabling effective strengthening of curved bridges, arches, and other non-planar structures.
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 method provides enhanced fire resistance, prevents corrosion of reinforcing bars, and facilitates quick and easy construction by automatically filling cracks with non-shrink grout, overcoming the limitations of traditional techniques in terms of space and surface complexity.
Implementation Method 1
the gap is filled with non-shrink grout so that the non-shrink grout is cured therein to strengthen the old concrete structure
Data Source
AI summary
The present disclosure provides a concrete structure strengthened using a grid reinforcement material and non-shrink grout and a method of strengthening the same in which, when strengthening a concrete structure such as a concrete slab or a concrete wall body that is damaged or deteriorated, a grid reinforcement material is mounted on one side of the concrete structure, a formwork is formed on an outer side of the grid reinforcement material to have a required gap, and then the gap is filled with non-shrink grout so that the non-shrink grout is cured therein to strengthen the old concrete structure, thereby being able to automatically fill and repair cracks formed in the concrete structure just by injecting the non-shrink grout without separately performing crack repair on the old concrete structure. Also, the grid reinforcement material may be easily fixed or mounted using a grid fixing device and may be easily applied to strengthening of a concrete structure having a curved surface as well as a concrete structure having a flat surface such as a concrete slab or a concrete wall body. In addition, reinforcing bars may be additionally arranged in a gap between a surface of the concrete structure and the grid reinforcement material so that the grid reinforcement material increases a cover thickness, and thus the concrete structure is remarkably strengthened.