Waterproof doggerel: a pithy formula for waterproof engineering construction

Construction Formula 1

Indoor waterproof shall be safe, and the base course shall be solid without falling bricks.

Dust also has a great impact, delaying construction and poor quality.

This sentence is about the requirements of indoor toilet waterproof for the grass-roots level. If the strength of the base course is low, resulting in poor adhesion between the waterproof layer and the structural base course, hollowing and falling off will be caused under the self weight of the subsequent protective layer and finishing layer, which will seriously affect the normal life of residents. The so-called firmness can be understood as no sanding. You can use your nails to peel the surface of the base course to see if there is cement gravel falling off. If it falls off, it can be leveled and repaired with polymer cement mortar.

Before waterproof construction, ensure that the base course is clean, and the existence of dust will isolate between the base course and the waterproof layer. Waterproof coatings, especially organic waterproof coatings, have large surface tension during construction and are not easy to infiltrate and spread. If there is dust, the coating can not be fully bonded with the solid base, and the waterproof film is still in danger of falling off. Similar situations have occurred in a construction site in Fangshan. After the waterproof layer is formed, it will fall off in a large area by gently tearing, The back is full of dust that has not been cleaned.

Construction formula 2

Do not have moisture, blistering is very anxious.

Large surface construction is in the back, and small nodes are given priority.

This sentence is about the requirements of indoor toilet waterproof for the grass-roots level. If the strength of the base course is low, resulting in poor adhesion between the waterproof layer and the structural base course, hollowing and falling off will be caused under the self weight of the subsequent protective layer and finishing layer, which will seriously affect the normal life of residents. The so-called firmness can be understood as no sanding. You can use your nails to peel the surface of the base course to see if there is cement gravel falling off. If it falls off, it can be leveled and repaired with polymer cement mortar.

Before waterproof construction, ensure that the base course is clean, and the existence of dust will isolate between the base course and the waterproof layer. Waterproof coatings, especially organic waterproof coatings, have large surface tension during construction and are not easy to infiltrate and spread. If there is dust, the coating can not be fully bonded with the solid base, and the waterproof film is still in danger of falling off. Similar situations have occurred in a construction site in Fangshan. After the waterproof layer is formed, it will fall off in a large area by gently tearing, The back is full of dust that has not been cleaned.

Construction formula 3

First brush a coating layer and strengthen the mesh cloth in it.

It refers to the method of node processing. For example, the internal corner shall be painted with waterproof paint first. Then lay reinforced mesh cloth. Brush the second coat of paint to ensure that the reinforcing layer is in the middle of the film and effectively protect the waterproof layer from damage by stress and other factors.

It is recommended to construct three times and dry the next layer.

After the node treatment, the waterproof construction of large surface can be carried out. Three times of construction can be adopted during construction, and the next construction can be carried out after each side is dry. If the fruit is not dry, one is that the film has no strength, and the film is seriously damaged during operation. In addition, the water vapor in the dry film will also cause damage to the waterproof layer.

Construction formula 4

The film shall be painted twice and three times, and the vertical painting shall be completed.

Coating protection is very important. There is no money for rework.

In the process of coating, only brushing in one direction will cause some exposed white spots to be unable to be filled effectively. The vertical brushing of the next coating can effectively break the balance of surface tension around the exposed white spots, which is conducive to the spreading of the coating, so as to ensure the integrity of the coating.

After the construction of all waterproof layers is completed, later protection shall be carried out. Many examples show that the closed water test is conducted after the coating to ensure no water leakage, but there is still leakage in the closed water test after the completion of all decoration, which shows that the later damage also has a great impact on the waterproof. The construction of protective layer and the installation of building accessories shall be reasonably arranged to minimize the impact on the waterproof layer.

Construction formula 5

All dry for two days, closed water experiment is safer.

Here is the question of when to do the closed water test after the film is dried. Whether it is an organic film or an aqueous film, the strength of the film has a process of strength growth. Due to the different climate and weather conditions in various places, it can not be considered that the closed water test can be carried out two or three days after the coating. It is recommended to confirm that the film is fully dry and has good strength and toughness before closed water test.


Post time: Aug-13-2021