7.7 It is noted that the quality of

7.7 It is noted that the quality of pores, bubbles: material mixing method and the mixing time is not uniform mixing of the material; construction employed should be power, but a high speed stirrer. Another reason is that the treatment of the base layer is not clean. The base layer should be carefully cleaned before coating. There should be no sand and dust, and there should be no pores on the base layer. The pores in each layer of the coating film should be treated in accordance with the process requirements to prevent damage to the coating film. Cause leakage. Drumming: The base layer has peeling, sanding, cracking, and non-drying, so that the coating film is not well bonded. The base layer construction should be carefully operated and maintained. After the base layer is dry, first coat the primer, and after curing, follow the waterproof layer construction process Apply layer by layer.7.8 Treatment of special parts: the weak links such as the roots of the pipes, drains, yin and yang angles, and deformation joints that highlight the roof should be made a waterproof additional layer before large-scale painting, and the fiber cloth should be cut into the yin and yang angles after the surface of the primer is dry. A cloth with the same size and shape as the root of the pipe and a 200mm widening around it should be spread over the roots of the pipe at the Yin and Yang angles. At the same time, apply the waterproof paint, and then apply the second and third coats of waterproof paint after the surface is dry for about 4 hours at room temperature. After 8 hours of drying, a large-area coating waterproof layer can be constructed. 7.9 Coating thickness control test and thickness inspection: The thickness of the coating is a key factor affecting the waterproof quality of the coating. It is more difficult to control the coating thickness correctly by manual operation. Because each coating has to be brushed several times to complete, and each coating should not be too thick. If the paint is too thick, it will appear that the surface of the paint has dried to form a film, but the water or solvent of the internal paint cannot evaporate or volatilize, making it difficult for the paint to dry and form a waterproof film with a certain strength and waterproof ability. Of course, too thin painting will also cause unnecessary waste of labor and delays in the construction period. Therefore, before coating waterproof construction, the thickness of each coating must be determined in advance according to the amount of coating per square meter, the thickness of the coating and the properties of the coating material required by the design. According to our unit’s previous construction experience and calculations, the total amount of paint should be controlled at 1.5kg/m2, and each scraping of paint should be 0.8kg/m2. Only through accurate material control can the thickness of the coating be accurately controlled, so that each The coating can be hard-dried to ensure the waterproof construction quality of the coating. The total thickness of the waterproof coating can be checked by appropriate sampling with a vernier caliper. Then repair the sampling site. 7.10 Coating film curling: the edge of the waterproof layer and the overlapping part of the sub-brush, the phenomenon of peeling and curling from the base layer appears. The main reason is that the base layer is not clean or dry, the closing operation is not meticulous, the sealing is not good, and the adhesion of the bottom coating is not strong. Therefore, the grassroots must be clean and dry, and the operation must be meticulous. 7.11 Damage: During the layered construction of the coating film waterproof layer or after all the coating film has been constructed, the coating film will be damaged or scratched before the coating film is cured before being operated by a person or placing tools and materials. The integrity of the coating film should be protected during construction. 8. Waterproofing coiled material construction: See the basement waterproofing coiled material construction for details. 9. Precautions for roof construction9.1 Strictly select roof waterproof materials. According to the types, specifications and performance requirements of the waterproof materials indicated in the design documents, select waterproof materials that meet the quality standards. The roof waterproof materials must have a factory certificate and a permit, and they must be used before use. Sampling shall be submitted for inspection according to regulations, and it can be used only after passing the retest. 9.2 The base layer of the roof and the structure of the protruding roof (parapets, joints of deformation joints, and downspouts, roof ridges, and gutters at the corners of the base layer) should be made into circular arcs.