It has good waterproof and flexibility.
The specifications and varieties of building waterproofing membrane have developed from a single asphalt felt in the 1950s to dozens of new high and middle-grade waterproofing membranes with different physical properties. Common waterproofing membranes can be generally divided into three series according to the material composition: asphalt waterproofing membrane, polymer modified waterproofing membrane, polymer waterproofing membrane, in addition to flexible polymer cement membrane and metal membrane.
Brief introduction of performance Petroleum asphalt paper tire waterproofing membrane is a traditional waterproof material in China, and it is still dominant in roof engineering at present.
Low temperature flexibility is poor, the waterproof layer has a short service life, but the price is low. Three-felt, four-oil, two-felt and three-oil roofing project is hot-bonded. The cold-bonded waterproofing membrane of petroleum asphalt glass tire has high tensile strength, the matrix is not perishable, the material flexibility is good, and its durability is more than twice that of paper tire membrane. It is often used as the reinforced additional layer and thermal waterproof layer of paper tire linoleum. Construction of petroleum asphalt glass fiber felt tire waterproofing membrane with cold cement paste has good water resistance, corrosion resistance and durability, and its flexibility is better than that of paper tire asphalt membrane. Cold paste building petroleum asphalt hemp tire waterproofing membrane has high tensile strength and good water resistance, but the matrix material is perishable and is often used as an additional layer for roof reinforcement. Cold mastic bonded waterproof membrane for building petroleum asphalt aluminum foil tire has high vapor barrier permeability, and it is suitable for vapor barrier when used in combination with perforated glass fiber felt or alone. The high and low temperature resistance of SBS modified asphalt waterproofing membrane is obviously improved. The elasticity and fatigue resistance of the coil are obviously improved. The composite application of single-layer roof waterproofing project or plastic body (APP) modified asphalt waterproofing membrane laid by cold construction or hot melting method has good strength, extensibility, heat resistance, ultraviolet radiation resistance and aging resistance. It is suitable for laying PVC modified asphalt waterproofing membrane on the roof in areas with strong ultraviolet radiation by hot melting or cold bonding, and has good heat resistance and low temperature resistance. The lowest uncoiling temperature is-18℃, which is beneficial to the construction of negative warm operation or cold operation in winter. EPDM rubber film has excellent waterproof performance, good weather resistance, good ozone resistance, good chemical corrosion resistance, high elasticity and tensile strength, strong adaptability to base deformation and cracking, light weight, wide applicable temperature range and long service life, but its price is higher. Bonding materials need to be matched with industrial and civil buildings with high requirements for roof waterproofing technology and long requirements for reasonable service life of waterproof layer. Single-layer or composite butyl rubber waterproofing membrane with cold bonding or self-bonding method has good weather resistance, tensile strength and elongation. The low temperature resistance is slightly lower than that of EPDM waterproofing membrane. Roofing waterproof engineering with single-layer or composite chlorinated polyethylene waterproofing membrane has high requirements, and has good weather resistance, ozone resistance, thermal aging resistance, oil resistance, chemical corrosion resistance and tear resistance. Single-layer or composite chlorinated polyethylene waterproofing membrane is suitable for cold bonding construction of chlorosulfonated polyethylene waterproofing membrane in hot areas with strong ultraviolet rays, with high elongation, good elasticity and strong adaptability to deformation and cracking of base course. It has good high and low temperature resistance, excellent corrosion resistance, good flame retardancy, high tensile and tear strength, high elongation, good aging resistance, rich raw materials and low price, and is suitable for roofing projects affected by corrosive media and PVC waterproofing membrane construction in cold areas. Using cold bonding method or hot air welding method to construct chlorinated polyethylene-rubber * * mixed waterproofing membrane is easy to be bonded to single layer or combined for exposed or protected roofs, which not only has the unique high strength of chlorinated polyethylene, excellent ozone resistance and aging resistance, but also has the unique high elasticity and high extensibility of rubber and good low-temperature flexible single layer or combined use performance. It is especially suitable for cold bonding construction of roofs in cold areas or with large deformation. EPDM-PE hybrid waterproofing membrane is a kind of thermoplastic elastic material, which has good ozone aging resistance and long service life, and can be used for low-temperature flexible single-layer or combined exposed waterproof roofs. Cold bonding method should be used to construct polyethylene polypropylene composite waterproofing membrane in cold areas. The composite membrane has good comprehensive properties such as strong anti-leakage ability, high tensile strength, good low-temperature flexibility, large linear expansion coefficient, good stability, non-toxicity, strong deformation adaptability, wide temperature range and long service life. It is suitable for bonding with the base of various materials, and can be directly bonded with cement materials when cured. Under wet conditions at the grass-roots level, the composite coiled material can be pasted by cold bonding construction method. The common paving methods of waterproofing membrane are 1. Hot melt method is to melt the hot melt adhesive at the bottom of waterproof coiled material (bonding part) with a heater, so as to realize the bonding between coiled material and between coiled material and base.
Waterproof membrane 2. Cold bonding method is a method of directly bonding waterproofing membrane with base by using cementing material, also known as cold compress and cold bonding.
3. Self-adhesive method adopts self-adhesive waterproofing membrane, which directly realizes the bonding between waterproofing membrane and base.
4. Hot air welding method adopts the construction method of hot air welding, and the waterproof coiled material is heated and bonded.
5. Mechanical fixing methods include nail pressing method and embedding method.
Nailing method is a construction method of fixing coiled material waterproof roof with galvanized steel nails.
Burying method is that most of the base course of coiled material is not bonded, only the periphery of coiled material is fully bonded, and pebbles are used for burying, such as empty paving method to invert the roof.
Construction technology Waterproof coiled material Waterproof coating forms a uniform coating after brushing and curing.
Waterproof coating should be applied in layers and times, and the coating applied for the first time should be dried to form a film before being applied.
Roof gutter, eaves gutter, cornice, flashing and other parts should be covered with additional layer of carcass reinforcement.
The additional floor at the joint of roof gutter, eaves gutter and roof should be paved empty, and the width of the floor should be 200-300 mm
When the roof is equipped with insulation layer, the insulation layer should be laid in the gutter and eaves gutter.
The joint between the impinges mouth and the roof should be sealed, and two additional layers with matrix reinforcement should be laid.
The depth of the coating into the impinges mouth shall not be less than 50 mm ..
The end of the coating waterproof layer should be painted with waterproof coating for many times or sealed with sealing material.
The leveling layer shall be provided with frame joints with a width of 20mm, and shall be located at the bearing of the plate, and the spacing shall not be greater than 6 mm ..
Frame joints shall be filled with sealing material.
The frame joint of leveling layer should be added with an additional layer with skeleton reinforcement, and its width should be 70-100 mm. ..
The corner should be painted as an arc with a radius of not less than 50 mm
The coating waterproof layer at the flashing place should be directly painted under the coping of the parapet.
Related entries (SBS) Modified asphalt waterproofing membrane (APP) Modified asphalt waterproofing membrane Yuan EPDM rubber waterproofing membrane Butyl rubber waterproofing membrane Chlorinated polyethylene waterproofing membrane Chlorosulfonated polyethylene waterproofing membrane
PVC waterproofing membrane Chlorinated polyethylene-rubber * * * mixed waterproofing membrane. Reference 1. Handbook of Building Construction II. GB 18967 —— 2003 Modified Polyethylene Tire Waterproof Coil 3.