3. Asphalt waterproofing membrane: Asphalt waterproofing membrane is a coiled sheet waterproof material made by coating asphalt on base tires (such as base paper and fiber fabrics) and then spreading powdery or sheet isolation materials on the surface.
3. Modified asphalt waterproofing membrane: Compared with traditional oxidized asphalt, the application temperature range of modified asphalt is greatly expanded, and the membrane made is smooth and soft, which can be made into 4-5 mm thick and can be used in a single layer, with reliable waterproofing effect, 15-20 years. Can be divided into: 1, elastomer modified asphalt waterproofing membrane (SBS membrane). Plastic modified asphalt waterproofing membrane (APP membrane).
Answered on July 27, 2022
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What are the waterproof materials for building foundation?
There are still more than two months before the 20 17 first-class constructor exam, and many candidates are nervously preparing for the exam. In order to facilitate your study, we have compiled some test sites from Luyou Education Department for your study. Knowledge points: frequency index of waterproof material ★★★★ 1. Flexible waterproof materials include: waterproof coiled material, waterproof coating, sealing material and plugging grouting material. 2. Waterproof membrane mainly includes asphalt waterproofing membrane, polymer modified asphalt waterproofing membrane and polymer (polymer) waterproofing membrane. 3. Characteristics and application scope of SBS and APP materials (1)SBS coiled material is suitable for roof and underground waterproofing of industrial and civil buildings, especially for building waterproofing in low temperature environment; (2)APP coiled material is suitable for roofing and underground waterproofing of industrial and civil buildings, as well as waterproofing of roads, bridges and other projects, especially for buildings in high temperature environment. 4. Main performance of waterproof coiled material The main performance of waterproof coiled material includes: (1) Waterproofing: commonly expressed by impermeability, impermeability and other indicators; (2) Mechanical properties: commonly expressed by tensile force, tensile strength and elongation at break; (3) Temperature stability: common indexes such as heat resistance, heat resistance and brittle temperature; (4) Atmospheric stability: common indicators such as aging resistance and performance retention rate after aging; (5) Flexibility: Flexibility, low-temperature flexibility, flexibility and other commonly used indicators. 5. Types and scope of application of waterproof coatings: Waterproof coatings can be divided into roof waterproof coatings, underground waterproof coatings and road and bridge waterproof coatings according to the parts used. According to the molding category, it can also be divided into volatile type, reactive type and reactive volatile type. Generally, it is classified according to the main types of film-forming substances. Waterproof coatings are divided into acrylic, polyurethane, silicone, polymer modified asphalt and other waterproof coatings. Waterproof coating is especially suitable for waterproofing of various complicated and irregular parts, and can form a seamless and complete waterproof film. The coated waterproof coating is not only the main body of the waterproof layer, but also the adhesive, so the construction quality is easy to ensure and the maintenance is relatively simple. Waterproof coatings are widely used in roof waterproof engineering, basement waterproof engineering, ground moisture-proof and seepage control, etc. Shorthand review focuses on the application scope of SBS and APP coiled materials and the main performance of waterproof coiled materials. Classic example 1. The aging resistance index of waterproofing membrane can be used to express the () performance of waterproofing membrane. A. Stretching B. Atmospheric stability C. Temperature stability D. Elastic answer B. Analyze this question to examine waterproofing membrane. The main properties of waterproof coiled material include: (1) Waterproofing: commonly used indicators such as impermeability and impermeability; (2) Mechanical properties: commonly expressed by tensile force, tensile strength and elongation at break; (3) Temperature stability: common indexes such as heat resistance, heat resistance and brittle temperature; (4) Atmospheric stability: common indicators such as aging resistance and performance retention rate after aging; (5) Flexibility: Flexibility, low-temperature flexibility, flexibility and other commonly used indicators.
Baidu netizen d5 19ef06
The answer? 2020-09- 19
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What waterproof materials are commonly used in engineering?
1. Asphalt waterproofing membrane, commonly known as linoleum, is a curled sheet waterproof material made by impregnating asphalt with base materials such as base paper, fiber fabric and fiber felt, and spreading powdery, granular or sheet materials on its surface. Paper linoleum and glass fiber linoleum are commonly used. 2. Polymer modified asphalt coiled materials are coiled materials made of synthetic polymers (such as styrene-butadiene rubber and reclaimed rubber). ) Modified asphalt is the coating, fiber fabric or fiber felt is the matrix, and powdery, granular, flaky or film-like materials are the covering materials, which are called polymer modified asphalt coiled materials. Polymer modified asphalt coiled material is suitable for roof waterproofing and basement plane waterproofing. At present, the main varieties are SBS modified asphalt hot-melt coil, APP modified asphalt hot-melt coil, APAO modified asphalt hot-melt coil, reclaimed rubber modified asphalt hot-melt coil and so on. 3.SBS modified asphalt waterproofing membrane SBS modified asphalt waterproofing membrane is an elastic asphalt waterproofing membrane. It is made by modifying asphalt (hereinafter referred to as "elastomer asphalt") with asphalt or thermoplastic elastomer (such as styrene-butadiene block polymer SBS) and impregnating tire carcass. It has the advantages of high elasticity, high tensile strength, difficult deformation and good low temperature performance. SBS modified asphalt waterproofing membrane is widely used in waterproof and moisture-proof projects of various buildings, especially in cold areas and buildings with frequent structural deformation. 4.APP modified asphalt waterproofing membrane APP modified asphalt waterproofing membrane is a kind of plastic asphalt waterproofing membrane. It is a waterproof coiled material made by impregnating the tire base (generally polyester felt or glass fiber felt) with asphalt or plastic (such as polypropylene) modified asphalt, coating plastic asphalt on both sides, and then using fine sand and polyethylene film as isolation layers. Polyester felt tire coil has high tensile strength, large elongation and strong puncture and tear resistance. APP modified asphalt waterproofing membrane has excellent high temperature resistance, aging resistance and radiation resistance. APP modified asphalt waterproofing membrane is especially suitable for building waterproofing in areas with high temperature or strong solar radiation. 2 Synthetic polymer waterproofing membrane Synthetic polymer waterproofing membrane is a coiled sheet waterproof material made of synthetic rubber, synthetic resin or their mixture, with appropriate chemical additives and fillers, through mixing, calendering or extrusion. It has the advantages of high tensile strength, good heat resistance and low temperature flexibility, corrosion resistance and aging resistance, cold construction and so on. At present, the suitable synthetic polymer waterproofing materials mainly include EPDM waterproofing materials, PVC waterproofing materials, chlorinated polyethylene waterproofing materials and chlorosulfonated polyethylene waterproofing materials. 1. EPDM waterproofing membrane EPDM waterproofing membrane is a kind of waterproofing membrane made of EPDM as the main body, adding proper amount of vulcanizing agent, accelerator, softener and filler. Through a certain process. It has the best aging resistance, strong adaptability to expansion or cracking of base course, wide application temperature range, good high and low temperature resistance, high tensile strength and acid and alkali corrosion resistance. EPDM waterproofing membrane is suitable for civil engineering with high waterproof requirements and long service life. Such as: basements, tunnels, etc. 2.PVC waterproofing membrane PVC waterproofing membrane is a kind of waterproofing membrane made of PVC resin as the main material and adding modifiers, antioxidants and ultraviolet absorbers. Through a certain process. It has the characteristics of strong adaptability to base deformation, good heat resistance and corrosion resistance. Polyvinyl chloride (PVC) waterproofing membrane is suitable for waterproofing works such as roofs, pools and dams of various buildings. 3 rigid waterproof material 1. Waterproof concrete a) Ordinary waterproof concrete is a kind of concrete that can improve its compactness and impermeability by adjusting its mixture ratio. B) Waterproof concrete with admixture is a kind of concrete that can improve the compactness and meet the impermeability requirements by adding chemical admixture. Commonly used are air entraining agent waterproof concrete, water reducing agent waterproof concrete, triethanolamine waterproof concrete, ferric chloride waterproof concrete, shrinkage compensating concrete (expansive cement waterproof concrete) and so on. C) Other Waterproof Concrete In recent ten years, some new types of waterproof concrete have appeared, such as fiber crack-resistant waterproof concrete, self-compacting high-performance waterproof concrete and polymer cement concrete. , which significantly improves the compactness and crack resistance of concrete, has its own characteristics and is called new waterproof concrete. 2. Lead alloy waterproofing membrane Lead alloy waterproofing membrane is a kind of waterproofing membrane with lead, tin and other metal alloys as the main materials, which has the properties of ductility, weldability, X-ray resistance and aging resistance. 3. "Membrane structure" waterproof roofing coil is the main material of new membrane structure building roof, which is both waterproof and roofing material. It is characterized by no need for roof truss and rigid roof panel, and only steel brackets and steel cables are used to support and fix the membrane material. Membrane structure waterproof roof is used in stadiums, exhibition halls, etc. Such as: Water Cube Gymnasium Building. 4 Waterproof coating Waterproof coating is a kind of fluid or semi-fluid substance, which is coated on the surface of the base by brushing, spraying and other processes to form a continuous film with certain elasticity and thickness, which isolates the surface of the base from water and plays a waterproof and moisture-proof role. Widely used in building roof waterproof engineering, especially basement waterproof engineering. Waterproof coatings can be divided into polymer modified asphalt waterproof coatings and synthetic polymer waterproof coatings according to the main components of film-forming substances. Polymer modified asphalt waterproof coating is suitable for high-grade waterproof roofs, floors, concrete basements and toilets. Synthetic polymer waterproof coating is suitable for roofs, floors, basements and bathrooms with low waterproof requirements.