LIANG Lian-kai\ YAN Yan-fei2 GE Jing-cao3 (1. Shenyang Xingda Construction & Installation Co., Ltd., Shenyang 110101, Liaoning, China; 2 Sujiatun District, Shenyang City, China; Construction Engineering Company, Shenyang 1101013, Liaoning, China Group, Shenyang 110001, Liaoning, China) I This paper describes the application prospects and construction considerations of polymer multilayer waterproof membranes. I 丨 polymer multi-layer waterproofing membrane; Construction; Note 1 Overview Waterproof material is an important functional material required by the construction industry and other related industries, is an important part of the building materials industry. With the rapid development of China's national economy, not only industrial buildings and civil buildings require high quality and variety of waterproof materials, but also high quality in industries and fields such as bridges, tunnels, national defense industry, agriculture and water conservancy, and transportation. Waterproof material. Since the reform and opening up, China's building waterproof material has achieved rapid development. Waterproof material has got rid of the lagging situation in the world of paper tarpaulin. At present, it has five categories, including asphalt linoleum (including modified asphalt linoleum), synthetic polymer waterproofing membrane, construction waterproof coating, sealing material, plugging, and rigid waterproof material. product. China's waterproof material has basically formed a waterproof material industrial system with complete categories, product specifications and grades, and technological equipment development that has begun to take shape. There are some foreign varieties that we basically have. At present, compared with foreign advanced countries, China's waterproof materials have the following main problems: First, the product structure is irrational. At present, the production and use of new waterproof sealing materials are very small, and the paper felt still accounts for 95% of the waterproofing materials; The product quality is generally low, and the fake and fair products flood the market. Third, the design and construction application technology needs to be improved and the building leakage is still quite serious. The waterproof material industry needs to adjust its structure and regulate the market. In accordance with the requirements of the cross-century development strategy of the building materials industry, “from big to strong, relying on new and strongâ€, the development of new types of waterproof materials and products will focus on the new words and promote industrial restructuring. 2 Construction of polymer multi-layered composite waterproofing membrane 21 Basic requirements The structural surface requires smooth surface, perpendicular wall intersections, and relevant drainage supporting facilities are installed firmly and fully prepared. The moisture content of the structural surface can not be higher than 40%, the hardness can be above 2.0 MPa or it can not be damaged after the person. 22 Construction and Technical Operation 221 Selection and production of adhesives Roof construction and toilets, surfing bathroom construction, and adhesives are self-made cement pastes. The joints can be properly selected according to the size of the project water pressure. Polyurethane glue. The main raw materials for the preparation of adhesives are cement and 108 glue. The proportion of its weight is generally 125 | 108 glue: water: cement, when the preparation of the first water and 108 plastic mixed, and then put the cement can be evenly mixed. 222 Construction Procedures Construction Preparation - Grassroots Clearance - Preparation of Binder - Node Construction - Main Waterproof Layer Laying - Closed Seam - Water Test - Protective Layer Construction - Quality Acceptance 3 Construction Operations ~ 5 Persons, | Buckets or Open Tanks , Two square shovels, two civilian scissors, cleaning tools and transport plastic bucket two, squeegee two (25m long) after the acceptance of the grass-roots level, remove the basic dust debris as required to prepare a good binder. The construction of the joints will be the first addition to the complicated parts such as the yin and yang angles, gutters, falling water outlets, exhaust outlets, and wall-piercing pipes. The main waterproof layer laying; laying adhesive layer on the inside, the laying direction of any choice, the order is to lay from the bottom to the height of the base, the first pre-release coil 5 ~ 10m to find the positive direction, adjust the adhesive surface, and then The intermediate position of the coil is fixed in position. From one end to the fixed position, the adhesive is evenly spread on the corresponding base surface of the coil, scraped to about 0.3m with a scraper, and the coil is rolled and lightened with a scraper. The surface of the coil is scraped, the air in the adhesive layer and the excess cement slurry are excluded, and the other end of the coil is laid in the same way, that is, the entire web of the coil is laid. The method of laying the next piece is the same, but the long-edge overlap of the coil must not be less than 10m. The short-edge overlap must not be less than 12m. The short-edge and short-edge spacing should not be less than 100m. The adhesion rate between the coil and the base must reach 85%. Hollow over a large area. Seams closed. After the waterproof layer is laid, a thorough inspection of the bonding quality and the waterproof layer shall be done in time. It is found that the waterproof layer has scratches, voids, curls, and empty drums that should be repaired immediately. After passing the repair, apply a brush to all the joints. Brush a layer of cement slurry and seal joints. In the water surface subject to water pressure, after the coils have passed the inspection, they shall be sealed with two-component polyether polyurethane glue at the edge of the coil. Two-component polyether polyurethane adhesives can also be used as adhesives. Attach a layer of additional cover strips. When the protective layer is applied, care must be taken to protect the waterproof layer. Quality acceptance. Additional layers should be firmly bonded without hollowing out of the drum. There is no damage to the edges, and the edges of the web and the web should be tightly sealed. The edge of the web edge should be sealed. After the water test, no leakage or leakage is acceptable. 4 Construction Precautions If there is any scratch on the coil during the construction process, it should be promptly repaired. Pay attention to the placement of the construction tools and prevent damage to the waterproof layer. The solidification time of the waterproof layer shall not be less than 48h. During this period, no person may trample on and appear to have construction behavior that affects the quality of the waterproof construction. Between ~30*C, protective measures shall be taken if there is rainy weather during the solidification of the waterproof layer. Avoid contact with oils and substances that affect the chemical properties of the polyethylene. â–³
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