Thin coated epoxy floor water bubbles often appear on the first floor or basement, occasionally on the second floor or above. Thin coated epoxy flooring blisters are usually discovered shortly after construction, and some blisters are found in the afternoon when the thin coated epoxy flooring pavement is laid. The blister develops continuously from small to large and stops when it reaches a certain level. The higher the temperature, the more likely water bubbles are to appear and develop faster. Bubbles come in different forms and sizes. Some water bubbles have a diameter exceeding 1 meter and a height of 20-50 millimeters.
The reason for foaming is a concern for everyone. When the blisters were cut open, it was found that all blisters contained water or inflammatory yellow fluid. The base layer of the thin coated epoxy floor is separated from the lower layer, and the adhesive material adhered to the lower layer is pulled into a peak nest shape, as shown in Figure 1-1. According to the explanation of physics, in a closed container containing a liquid, the evaporation of the liquid results in a temperature pressure relationship with three saturation curves.
In a closed container, the pressure containing saturated water vapor increases with temperature. When the temperature is 20 degrees. The pressure inside the drum is 0.01 megapascals, but when the temperature is 70-80 ℃. It rises to 0.1 megapascals. The extreme radiation heat on the ground can reach 70% in many areas. A hot summer. At such high temperatures, epoxy cement will still soften and greatly reduce its adhesive strength, so it is like gradually blowing into the tire, causing the epoxy base to expand and pulling the cement into a honeycomb. The bonding between the epoxy layer without bubbles and the grounding part is unstable. Careful observation of the contact area will also reveal some incurable parts.
1. For the lower layer, such as the cement mortar leveling layer, the high moisture content should be controlled at 12%, and the high moisture content of the lower layer should be controlled to be greater than that of the leveling layer.
The dehydration of other components in epoxy resin is endless.
During the construction period, epoxy resin cannot be well integrated with the lower layer, leaving behind the chemical activity of both the leisure and epoxy resin itself. If it is not completely cured, it may be due to residue or gas encountering wetting gas and not completely cured.
4. Wetting gas penetrates into the lower underground layer.
From the above four aspects, the moisture of the lower layer is key, while the lower layer is not dry. The moisture content cannot determine whether thin coated epoxy flooring will have water bubbles. Some moisture and epoxy residue in the lower layer are encapsulated in the epoxy resin and lower layer, resulting in bubbles of different sizes. Because the epoxy resin layer itself is impermeable and non breathable, it cannot exclude moisture, leaving behind bubbling root seedlings. Therefore, bubbles appear on the plane, mainly between the lower layer and the epoxy resin layer. The moisture in the lower layer is difficult to prevent.