External wall waterproofing is a subdivisional waterproofing project to ensure that the structure of the building (structure) is not attacked by water and the internal space is not harmed by water. The external wall waterproofing project occupies an important position in the entire construction project. The external wall waterproofing project involves many exterior wall structures such as the basement exterior wall of the building (structure), the exterior wall of the house, etc. Its function is to make the building or structure within the design durability limit, and prevent rainwater, domestic water leakage and groundwater The corrosion of the building structure and interior space is not defaced, and it provides people with a comfortable and safe living environment.
1. Refilling parts and cold joints: For the refilling parts and cold joints of each layer, the binding effect between the concrete cannot be expected. If there is a small earthquake and the shrinkage of the concrete, the joints will be cut off, causing leakage. The rain situation. According to this situation, we have to configure the concrete and wall paint in the corresponding proportions, and use the brush to paint the exterior wall.
2. Concrete cracks: In the concrete poured on site, each layer has continuous filling joints or cold joints, which are prone to honeycomb or poorly filled parts, forming innate shrinkage cracks. This is especially true for walls with large spans or continuous waist walls protruding from the wall structure. We need to dilute the wall paint according to this specific situation and fill the cracks with wall brushes.
3. Around the opening: It is not limited to the concrete structure, and the area around the opening is the location that is prone to weak points in waterproof construction. In the case of pouring concrete or using the tile template pre-attachment method, just pay attention to the window sill. However, in the occasion of painting the decoration or attaching the tiles, cement floats or debris, voids, and the top of the concrete will appear around the window. In the case of horizontal or reverse slope, there will be parts full of defects.