Separable Concrete Expansion Joint Insert for Clean Removal
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Solution Overview
Problem
Traditional expansion joint inserts made of materials like wood, paper, and asphalt are difficult to remove in one piece without breaking, and more recent recycled rubber inserts also face this issue, complicating the sealing process.
Innovation Solution
A concrete expansion joint insert with a separable design featuring a separation support member, such as a metal wire or polymer, and a separation feature along the interface between portions, allowing easy removal of one portion without breaking, facilitated by a reinforcement mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional expansion joint inserts are made of materials like wood, paper, and asphalt, then they provide basic expansion joint functionality, but they are difficult to remove in one piece without breaking
Solution Approach 1:
The insert is divided into two distinct portions: a removable first portion and a retained second portion. The separation feature creates a predetermined break line between these portions, allowing the first portion to be removed cleanly without breaking while leaving the second portion in place to maintain joint functionality.
Solution Approach 2:
The insert incorporates a separation support member made of a material different from the main insert material. This composite structure provides differential properties where the support member maintains structural integrity during handling but allows clean separation at the interface, solving the contradiction between ease of removal and structural integrity.
2Reliability
If recycled rubber expansion joint inserts are used, then they provide improved material properties and durability, but they still face the issue of being difficult to remove without breaking
Solution Approach 1:
Even with durable recycled rubber material, the insert is segmented into removable and retained portions. The separation feature creates a controlled weak point that allows the first portion to be removed without breaking the durable second portion, maintaining both reliability and ease of operation.
Solution Approach 2:
The separation support member acts as an intermediary element between the two portions. It provides a controlled separation interface that allows easy removal of the first portion while the durable second portion remains intact, resolving the contradiction between durability and ease of removal.
3Ease of operation
If the insert is designed to be completely removable, then sealing becomes simpler, but the structural integrity and support during service may be compromised
Solution Approach 1:
The segmentation into two portions allows the first portion to be completely removed for simplified sealing operations, while the second portion remains to maintain structural stability and joint support during service. The separation feature ensures clean separation without compromising the integrity of the retained portion.
Solution Approach 2:
The first portion is designed to be extracted or removed completely from the joint assembly. This extraction simplifies the sealing process by providing full access to the joint space, while the second portion remains in place to maintain structural stability, resolving the contradiction between ease of sealing and structural integrity.
Data Source
AI summary
A concrete expansion joint insert includes a body having a length between a first end and a second end, a thickness between a first side and a second side, and a height between a first edge and a second edge. The body includes a first portion having the thickness, the length, and a first amount of the height. The body includes a second portion having the thickness, the length and a second amount of the height. The first portion of the body is predisposed to be separable from the second portion of the body. A separation support member is situated within the first portion along a substantial portion of the length.