Expansion Joint Seal with Composite Foam and Fabric Membranes
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Solution Overview
Problem
Conventional expansion joint seal systems face challenges in providing both water and fire resistance while maintaining flexibility and movement capabilities, often requiring additional coatings or impregnations that increase cost and reduce movement range, and fail to adequately address vertical shifts and curved joint designs.
Innovation Solution
The system comprises multiple bodies of varying sizes and compressibilities, with specific dimensions and adhering properties, allowing for localized areas of increased density and integrated load transfer, along with a flexible barrier for enhanced water and fire resistance, and optional sensors for monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional expansion joint seal systems use additional coatings or impregnations to provide water and fire resistance, then water and fire resistance is improved, but device complexity and cost increase, and movement range is reduced
Solution Approach 1:
The joint seal system uses a composite structure consisting of a foam core body combined with fabric-reinforced waterproofing membranes. The foam core provides compressibility and movement accommodation, while the fabric-reinforced membranes provide water and fire resistance. This composite approach integrates multiple functions into a unified system, eliminating the need for separate coatings or impregnations while maintaining reliability and reducing device complexity.
Solution Approach 2:
The patent changes the physical parameters of the joint seal by using a foam core with specific compressibility characteristics combined with fabric-reinforced membranes that have controlled permeability and fire resistance properties. This parameter-based design allows the system to accommodate movement through compression while maintaining water and fire resistance, without requiring additional coatings that would restrict movement.
2Ease of manufacture
If conventional joint seals use uniform density throughout, then manufacturing is simplified, but localized load distribution and water resistance are insufficient
Solution Approach 1:
The joint seal system implements local quality by combining a foam core with uniform density with fabric-reinforced waterproofing membranes positioned at specific locations where water resistance and load distribution are most needed. The fabric reinforcement is strategically placed to provide localized areas of increased density and strength, while the foam core maintains uniform density for ease of manufacture. This approach provides enhanced local performance without requiring the entire structure to be complex.
Solution Approach 2:
The system segments the joint seal into distinct functional components: a foam core body for compression and movement accommodation, and fabric-reinforced waterproofing membranes for localized water resistance and load distribution. This segmentation allows each component to be optimized for its specific function while maintaining overall manufacturing simplicity.
3Device complexity
If conventional expansion joints are designed for horizontal movement only, then design is simplified, but vertical shifts and curved joint designs cannot be accommodated
Solution Approach 1:
The joint seal system implements dynamics by using a compressible foam core that can deform in multiple directions and planes. The foam core's cellular structure allows it to accommodate not only horizontal expansion and contraction but also vertical shifts and curved movements. The fabric-reinforced waterproofing membranes are designed to flex and conform to the foam's deformation, enabling the system to adapt to various movement patterns while maintaining structural integrity.
Solution Approach 2:
The system achieves universality by designing a joint seal that can perform multiple functions: horizontal expansion/contraction, vertical movement accommodation, and curved joint sealing. The combination of compressible foam core and flexible fabric-reinforced membranes creates a multi-functional system that can adapt to different joint configurations and movement patterns without requiring separate specialized components for each type of movement.
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 provides a cost-effective, flexible, and durable expansion joint seal that maintains water and fire resistance across a wider range of movements, including vertical shifts, while reducing the need for additional coatings and improving load distribution, thus enhancing the structural integrity and longevity of the seal.
Implementation Method 1
a foam core body combined with fabric-reinforced waterproofing membranes
Implementation Method 2
fabric-reinforced waterproofing membranes that may be adhered to each other and/or to the joint substrate
Data Source
AI summary
A system for creating a joint filler or seal in the gap between adjacent panels or assemblies. An expansion joint seal system includes multiple bodies of differing sizes and compressibilities, which when compressed provide water resistance and localized areas of increased density.