Fiberglass Loop Tie Rod Structure for Rust-Free Concrete Forms
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Solution Overview
Problem
Conventional metal tie rods for concrete forming systems are expensive, labor-intensive, prone to rusting, difficult to install and remove, and can mar the finished concrete wall, while non-metallic ties are weaker and provide poor water sealing.
Innovation Solution
A loop tie rod constructed from fiberglass wound around thimble elements, which are coated with a curing agent, offering strength comparable to metal rods and improved thermal expansion matching with concrete, with a channel design to enhance water sealing and ease of installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal tie rods are used in concrete forming systems, then strength and structural integrity are improved, but rusting, cost, and difficulty of installation/removal increase
Solution Approach 1:
The patent applies composite materials by combining fiberglass (non-metallic reinforcement) with resin (matrix material) to create a tie rod that provides both strength and corrosion resistance. The fiberglass-resin composite structure maintains the structural integrity needed for concrete forming while eliminating the rusting problems associated with metal tie rods.
2Strength
If metal tie rods are used, then strength is improved, but the finished concrete wall surface quality deteriorates due to marred walls
Solution Approach 1:
The fiberglass-resin composite tie rod eliminates metal contact with the concrete surface, preventing the marring effect. The non-metallic composite material allows for cleaner removal or snapping off without leaving metal residues or stains on the finished concrete wall surface.
3Object-affected harmful factors
If conventional fiberglass tie rods with parallel fibers are used, then non-metallic properties are achieved, but strength decreases
Solution Approach 1:
The patent applies local quality by orienting fiberglass fibers in specific directions within the resin matrix to maximize strength in critical areas. The fiber orientation is strategically designed to bear the tensile and bending loads experienced during concrete pouring, creating localized reinforcement where needed most while maintaining overall non-metallic properties.
Solution Approach 2:
The patent uses composite materials with strategically oriented fiberglass fibers embedded in a resin matrix to achieve both non-metallic properties and high strength. The composite structure leverages the tensile strength of fiberglass fibers while the resin matrix provides structural continuity and load distribution.
4Ease of operation
If complex fastening hardware is used to secure fiberglass rods, then installation capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the fastening function from separate complex hardware components and integrates it directly into the tie rod structure itself. The fiberglass-resin composite tie rod is designed with built-in features such as embedded lugs, slots, or molded attachment points that provide secure mounting to formwork without requiring external bearing plates, tensioning nuts, or wedge gripper assemblies.
Solution Approach 2:
The tie rod design integrates multiple functions into a single component: structural reinforcement, corrosion resistance, and built-in fastening capability. The fiberglass-resin composite structure incorporates attachment features directly, eliminating the need for separate fastening hardware and simplifying the overall system.
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 fiberglass loop tie rod provides strength equivalent to metal rods, reduces water pathways, and ensures clean removal without marred walls, suitable for applications requiring non-magnetic and aesthetically clean finishes.
Implementation Method 1
a continuous fiber wound around a pair of opposed thimble elements to form the tie rod
Implementation Method 2
thimble elements, which are coated with a curing agent
Data Source
AI summary
A tie rod suitable for use with known concrete forming systems is constructed from a non-metal fiber, such as fiberglass, that is wound about a pair of opposed thimbles. The resultant tie rod is as strong as a metal tie rod without the drawbacks of conventional metal tie rods. Each of the thimbles has a main body with a channel formed in an outer surface of the main body. The continuous fiber is disposed within the channel when wound thereabout. The continuous fiber is wound to have a depth greater than the thimble in the direction perpendicular to a plane of the thimble.