The waterproof layer is an important protective layer, which can effectively block moisture and prevent moisture leakage. If the waterproof layer is not properly constructed, cracks are prone to occur. So, how to deal with cracks in the waterproof layer? Let's take a look at it with the waterproof duck editor.
First, the waterproof layer has a crack treatment method
1. When cracks appear in the waterproof layer, the cause should be identified first. If it is a temperature crack, the concrete layer should be cut at the crack location, parallel or vertical angle can be used to form a dividing seam, the width is generally 1.5 to 3 cm, the depth is between 2 and 2.5 cm, and the waterproof layer cannot be destroyed too deeply. After that, a waterproof plugging agent is embedded. The dividing seam is generally controlled at about 4 meters.
2. General cracks appear in the waterproof protective layer. Cracks and crevices need to be picked out first, and loose surfaces such as stones, dust, and gravel need to be cleaned. After wetting the base surface with water, apply a layer of cement mortar, then fill it with polymer crack-resistant plaster mortar, and wet the base surface with water after the surface layer is dried.
3. Sand surface appears in the waterproof protective layer. The surface layer is first cleaned and moistened with water, followed by an anti-crack mortar, evenly smoothed, and the surface is covered with plastic film or felt for sprinkler maintenance.
4, the cement surface cracks and accompanied by the phenomenon of empty drum on the base surface, clean up the empty drum layer, re-do the cement mortar layer, you can also use gypsum self-leveling, so that the base surface is leveled, in order to achieve a smooth effect.
Second, the waterproof layer has cracks
1. The roof is exposed to the sun and rain for a long time, and the concrete surface layer will be carbonized, and the base surface will harden and age, resulting in the shelling and sand of the waterproof layer, causing leakage.
2. The seam deformation displacement caused by uneven settlement and deflection of the foundation leads to cracking and leakage of the waterproof layer.
3. The waterproof structure of the deformation seam, the waterproof structure of the extended roof pipe, the flood structure, the waterproof structure of the split seam, the waterproof structure of the water drop mouth and other roof details do not meet the requirements of the specification, resulting in roof leakage; In addition, due to the inconsistency between the deformation of the daughter wall, gable and roof panel, if the detail structure of the junction is not handled properly, it is easy to crack at the junction and form leakage.
4. If the basic process of roof caulking is not paid attention to during construction, before the caulking, the floating sand, stone chips and other clips in the seam are not removed, resulting in the caulking is not dense, resulting in roof leakage; In addition, the adhesion, flexibility and anti-aging ability of the caulking material are poor, and it cannot adapt to the deformation of the waterproof layer and produce cracks. Cracking and leakage of waterproof layer treatment measures Different climatic conditions around the world, different local waterproofing materials and differences in construction technology and construction level, roof waterproofing practices are different, so the causes of quality diseases such as cracking and leakage of concrete rigid roofs are also different, and should be treated differently in construction.
The above is the waterproof layer with cracks brought by the waterproof duck Xiaobian, I hope to help everyone.