Concrete Joint Sealing Element Installation Without Split Formwork
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Solution Overview
Problem
The existing methods for installing waterstops in concrete joints are complex and require split formworks, which can be time-consuming and difficult to manage, especially for structures with complex geometries, and often necessitate mechanical retention that compromises the integrity of the concrete surface.
Innovation Solution
A method involving a sealing element with a center portion and side portions, where the sealing element is positioned between split expansion boards, deflected to align with continuous formwork, and embedded in concrete sections without the need for split formworks, using a functional coating for bonding with cementitious compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If split formworks are used to install waterstops, then the waterstop can be securely positioned, but the installation process becomes complex and time-consuming
Solution Approach 1:
The invention extracts the waterstop installation function from the complex split formwork system. By positioning the waterstop directly in the joint before concrete pouring and using a simple continuous formwork instead of a complex split formwork with retention mechanisms, the solution removes the unnecessary complexity while maintaining secure positioning through the concrete embedding process itself
Solution Approach 2:
The invention segments the formwork into a simple continuous type that doesn't require splitting or complex retention mechanisms. The waterstop installation is separated into independent positioning steps that don't require the entire formwork system to be complex, allowing straightforward installation without compromising security
2Reliability
If mechanical retention is used to secure waterstops, then the waterstop remains in position during concrete pouring, but the concrete surface integrity is compromised
Solution Approach 1:
The concrete itself serves as the retention mechanism rather than requiring separate mechanical retention devices. The waterstop is positioned and held in place by the concrete mass during pouring, eliminating the need for nails, clips, or other mechanical retainers that would compromise surface integrity
Solution Approach 2:
The invention removes mechanical retention mechanisms from the installation process. By relying on the concrete's own weight and formwork containment to hold the waterstop in position, the solution eliminates harmful mechanical retainers that would damage the concrete surface while maintaining position stability
3Adaptability or versatility
If split formworks are used for waterstop installation, then the waterstop can be installed in complex geometries, but the installation time increases
Solution Approach 1:
The continuous formwork serves multiple functions: it contains the concrete, positions the waterstop, and works for various joint geometries without requiring splitting or special retention mechanisms. This universal approach maintains adaptability to different geometries while significantly reducing installation time compared to split formwork systems
4Reliability
If mechanical retention mechanisms are used, then the waterstop is securely held, but the concrete surface requires additional waterproofing treatment
Solution Approach 1:
The invention removes mechanical retention mechanisms that create surface defects requiring additional waterproofing. By using concrete embedding and simple continuous formwork to hold the waterstop in place, the concrete surface remains intact and doesn't require additional waterproofing treatments
Solution Approach 2:
The concrete structure itself provides the retention function without requiring separate mechanical devices. This self-service approach maintains surface integrity and eliminates the need for additional waterproofing layers that would be required if mechanical retainers were used
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
This method simplifies the installation process, reduces complexity, and ensures a secure, waterproof seal without compromising the concrete surface integrity, enabling faster and more efficient sealing of concrete joints.
Implementation Method 1
a functional coating for bonding with cementitious compositions
Data Source
Figure 1~2iii
Figure 3~4vi
Figure 5~6
AI summary
The invention is directed to a method for installing a sealing element for a concrete joint, which avoids the use of split formworks. The sealing element used in the method comprises a body (2) having a center portion (3) and first and second side portions (4, 5) on opposite sides of the center portion (3). The invention is also directed to a sealed concrete construction obtainable by using the method of the present invention.