After completing the construction of an epoxy resin wear-resistant floor coating, blistering can occur due to several factors. As a professional in the field, I’d like to share some insights on why this happens.
Firstly, if the ambient temperature is too high, it can cause the epoxy cement to soften and lose its viscosity, weakening its bonding capability. Secondly, if the base layer is damp or retains moisture, the trapped water vapor cannot escape effectively, leading to blistering. Thirdly, improper construction can create gaps between the epoxy layer and the base layer, allowing air and moisture to get trapped beneath the surface.
In essence, gases such as water vapor, residual epoxy compounds, and other volatile substances can become encapsulated within the epoxy layer, forming bubbles of varying sizes. Given that epoxy coatings are typically non-permeable to moisture, these trapped gases often result in visible blisters forming over time.
To avoid blistering in epoxy flooring, three key elements need to be addressed during the construction process: moisture, direct sunlight, and dust contamination. Here are some practical steps to prevent this issue:
(1) Before applying the epoxy, ensure the ground base has a proper waterproofing layer to stop water vapor from rising. The moisture content in the base layer or waterproofing layer should be kept below 8%, with a compressive strength exceeding 20MPa, before proceeding with the epoxy application.
(2) Enhance the bond between the epoxy layer and the base layer or waterproofing layer to counteract any swelling forces that could lead to blisters.
(3) Use high-quality primer materials during the initial layer application. This ensures that part of the epoxy penetrates the base layer or waterproofing layer, creating a seamless connection. It also improves adhesive properties while minimizing leftover residues or harmful chemicals post-curing.
(4) After completing the epoxy application, avoid exposing the floor to direct sunlight to minimize temperature fluctuations within the epoxy layer.
(5) Ensure thorough cleaning of the base layer or waterproofing area prior to construction to eliminate dust and debris. This guarantees there are no gaps between the newly applied epoxy layer and the underlying surfaces.
By following these guidelines, you can significantly reduce the risk of blistering in your epoxy flooring projects. Proper preparation and attention to detail are crucial at every stage of the process to achieve optimal results.
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