After years of construction experience and observation, found that the main reasons for foaming after the construction of epoxy floor paint are as follows: 1, the temperature is too low, resulting in whitening of epoxy materials after construction, affecting the surface effect; 2, the base of the floor did not do a good waterproof layer, water vapor can not be removed; 3, epoxy and base construction did not clean grinding to Position and so on. In summary, some water vapor, epoxy residues and gases in the base layer are wrapped in epoxy and the base layer, forming bubbles of different sizes. Because the epoxy layer itself is impervious to water, water vapor can not be discharged, leaving bubbling root seedlings.
In order to prevent the epoxy layer from blistering, it is necessary to put an end to three things in the construction of epoxy floor paint: (1) water; (2) exposure to sunlight; (3) dust.
Measures are taken to prevent blisters from occurring.
(1) Make a waterproof layer on the ground base to prevent water vapor from seeping upward, strictly control the moisture content in the base or waterproof layer within 8%, the compressive strength is greater than 20 MPa, and the ground should not only reach the surface dry, but also to dry, and then carry out epoxy construction.
(2) Increase the adhesive force between epoxy layer and base layer or waterproof layer, overcome the expansion force when the initial blistering to avoid blistering.
(3) In the construction of epoxy coatings, good quality materials should be selected for the bottom coatings: 1) let the epoxy resin base penetrate into the base or waterproof layer to form a whole; 2) improve the adhesive force, leaving less residual substances or chemical gases after curing.
(4) avoid sunshine after the construction of epoxy, reduce the temperature difference between the epoxy layer and the inner surface.
(5) the construction of grass roots or waterproof layer must clean up dust and sundries. After construction, there is no gap between epoxy layer and base course or waterproof.
According to the introduction, the epoxy floor base for waterproofing, waterproofing materials in the selection must have the following points: 1) impermeability; 2) compressive resistance, strength greater than 20 MPa; 3) and the ground has a strong adhesion; 4) and epoxy resin easily bonded to form a whole. In addition, the waterproof layer should not be heavily stressed during the 3 days after completion of construction, and protect the finished product.
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