With the continuous development of the industry, there are many kinds of waterproof materials, among which, flexible waterproof materials, such as rubber coil waterproof, polyurethane coating waterproof, have strong toughness, and can adapt to certain deformation, expansion and shrinkage, not easy to crack and other advantages. However, in practical engineering, if the operation and technical specifications are not followed strictly, the construction quality will be affected. Appear quality general disease, how should be medicated to the disease? Let's see.
Honeycomb appears on the coated surface
The reasons causing
During the construction of polyurethane waterproof coating, the environment is too humid or the coating is not dry and meets the situation of rain; During the construction of water-emulsion waterproof waterproof and waterproof coating, there is water accumulation on the surface of the base layer or the case of wet coating when wet coating is not dry, which will reduce the strength of the coating and lead to honeycomb on the surface.
Prevention and control measures
Construction is strictly prohibited in rainy weather. Before the film coating construction, the surface of the base layer should be checked to ensure that there is no bright water, and it is best to ensure that the coating is wet before it is dry after the construction, and appropriate rainproof measures should be taken to ensure the ventilation of the construction site.
There are sand holes or air holes in the coating
The reasons causing
For example, the water-emulsion waterproof waterproof and waterproof coating, during the construction, the surface coating will dry quickly due to the presence of floating ash, excessive dryness or excessive thickness of the coating at the base, and a film will be formed on the surface of the layer, and the gas will slowly escape out of the base layer, resulting in trachoma or porosity on the coating surface.
Prevention and control measures
Before painting waterproofing paint, it is necessary to clean the base layer to ensure that its surface is free of floating ash, bright water, etc., and to achieve a thin coating many times.
The waterproof material has lesions
The reasons causing
For example, polyurethane waterproof coating, due to its transport, loading and unloading process adopted in the wrong way, resulting in the coating in the bucket precipitation, increased consistency and other phenomena, even curing scrap situation. In addition, its long unused time may also lead to its pathogenesis.
Prevention and control measures
Transportation, loading and unloading of coatings shall be carried out in strict accordance with the instructions for use of the products. When the paint comes into play, it should be designed in strict accordance with the construction plan, and its dosage should be used as soon as possible after opening. In addition, for the storage of paint, it should be sealed in a ventilated and cool warehouse, and its principle of fire, sun and rain, transport process to ensure its packaging intact.
Slow drying rate after construction
The reasons causing
For example, waterproofing waterproofing waterproofing and waterproofing paint, it is through the paint itself moisture evaporation, and then curing into a film. In the actual construction process, if the ambient temperature is too low, the curing time of the coating will be too long. When the temperature is lower than 0 ℃, moisture to evaporate in coatings and leading to its conjunctiva, moreover also lead to an oil-in-water type emulsion coating at low temperature.
Prevention and control measures
Engineering, should avoid as far as possible under the environment of low temperature construction waterproof coating, should not be below 5 ℃ construction, and construction environment in a state of ventilation.
