Polishable Overlay Placement Using Uncoupling Mat
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Solution Overview
Problem
The application of polishable overlays is labor-intensive, time-consuming, and hazardous due to the need for multiple preparation steps, including the use of epoxy primers and broadcast sand, which can lead to airborne contaminant release and health risks, as well as issues with adhesion and cracking in the finished floor.
Innovation Solution
The method involves applying a polishable overlay directly over an uncoupling membrane secured to the substrate, eliminating the need for a primer and broadcast sand layer, which reduces preparation time and health hazards, and enhances adhesion and bonding through the use of a fabric-like mat and geometric patterns on the membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If epoxy primers and broadcast sand are used for adhesion, then bonding strength is improved, but health hazards and airborne contaminants increase
Solution Approach 1:
The patent removes the epoxy primer and broadcast sand layers from the traditional overlay application system, replacing them with a mechanically-locked wire mesh reinforcement embedded directly in the overlay concrete. This extraction eliminates the sources of airborne contaminants while maintaining adhesion through a different mechanism.
Solution Approach 2:
The wire mesh reinforcement acts as an intermediary element between the overlay concrete and the existing floor. Instead of using chemical adhesives (epoxy primer), the mesh provides mechanical interlocking and reinforcement, serving as a mediator that transfers and distributes stresses without requiring hazardous bonding agents.
2Strength
If multiple preparation steps including priming and sand broadcasting are performed, then adhesion is improved, but installation time increases
Solution Approach 1:
The patent combines the reinforcement and adhesion functions into a single integrated component - the wire mesh reinforcement embedded in the overlay. This merging eliminates the need for separate primer application and sand broadcasting steps, reducing the number of operations while maintaining structural integrity.
Solution Approach 2:
The wire mesh reinforcement is embedded in the overlay concrete during the pouring process itself, performing the adhesion and reinforcement functions simultaneously with the overlay installation. This preliminary integration eliminates subsequent preparation steps that would otherwise be required for proper bonding.
3Reliability
If epoxy primer and broadcast sand are applied, then crack-bridging capability is improved, but complexity of the application process increases
Solution Approach 1:
The patent extracts the crack-bridging function from the complex multi-layer primer and sand system and concentrates it in the wire mesh reinforcement. The mesh provides tensile strength and crack distribution throughout the overlay, achieving the same protective function with a simpler, more direct approach.
Data Source
AI summary
Methods, systems and polished overlays utilizing an uncoupling membrane between a substrate (e.g., floor) and a deposited polishable overlay. The overlay may be a self-leveling, polishable overlay. An uncoupling membrane is secured to a substrate followed by directly depositing a polishable overlay over and contacting the uncoupling membrane. The uncoupling membrane secures the polishable overlay to the substrate without use of a primer/broadcast sand layer. The polishable overlay may fill voids in the uncoupling membrane and may be deposited over the uncoupling membrane to a thickness residing above a top surface of the uncoupling membrane. The polishable overlay may be polished once cured whereby the uncoupling membrane reduces stresses in the overlay layer during polishing.