Jinhua tempered glass custom (a) silicone structural sealant glue joint
1. The construction of the curtain wall with silicone structural sealant joints is a force-bearing structure, which is a key part of the safety of the curtain wall and an important type of glue joint in the joint of the curtain wall. The main parts of this kind of glue joint are: hidden frame glass curtain wall, semi-hidden frame glass curtain wall and glass frame of aluminum alloy frame with hidden frame opening window of open frame glass curtain wall; connection part of glass curtain panel and glass rib of all glass curtain wall The connection between the glass and the frame of the glass top upside down. Metal and stone curtain walls are also treated with silicone structural sealants for joint treatment, but the application range is small.
2. The joint glue joints of the above parts not only have to bear the positive and negative wind loads, earthquakes, but also the long-term bearing the weight of the glass plates, and the silicone structural sealant has a low load carrying capacity. The specification stipulates that the strength design value of silicone structural sealant under wind load or horizontal earthquake is 0.2N/mm2, and the design value of strength under load is only 0.01N/mm2, which is only equivalent to l/20 of the former. . Moreover, under the load, the glue joint will be greatly deformed. Therefore, for the rubber joints that bear the load parts, Jinhua tempered glass should be customized such as hidden frame or horizontal semi-hidden glass curtain wall, and the bottom of the glass and the top of the inverted glass should be provided with support or metal safety parts to ensure safety.
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3. Concealed frame, semi-hidden frame glass curtain wall silicone structure sealant bonding width and thickness should be determined according to calculation: thickness should not be less than 6mm, and should not be greater than l2mm; width should not be less than 7mm, and should not be greater than thickness, also Should not be greater than 2 times the thickness.
4. The transmission glue joint between the panel and the glass rib of the full glass curtain wall must be made of silicone structural sealant, and can not be mixed with the joint between the general glass panels. The size of the force transmission joint must be determined by calculation. Due to the structural requirements, the gap between the full glass curtain wall panel and the panel, the panel and the glass rib is generally large, and sometimes the thickness of the seam may be greater than the width. When the structural calculation requirements are met, it is allowed to fill the surface of the whole glass curtain wall with a qualified foaming pad and other materials, and then the two sides are glued, but the thickness of the glue joint should not be less than 6 mm. Wenzhou fire glass customization
(2) The seam of silicone weatherproof sealant
1. Silicone weathering sealant is mainly used for seams between various curtain wall panels, and also for sealing between curtain wall panels and decorative surfaces, structural surfaces and metal frames. It has similarities with many performance requirements of silicone structural sealants, but silicone weatherproof sealants are more resistant to atmospheric changes, UV and aging resistance, while silicone structural sealants have stronger strength and ductility. And bonding properties. Therefore, the two should not be used interchangeably, and the structural sealant should not be used as a weather-resistant sealant.
2. Silicone weatherproof sealant has two main functions: First, it is suitable for temperature expansion and deformation of components, so that the panels on both sides of the joint do not collide and crack, and the other is to prevent rainwater from penetrating into the room. Therefore, the glue joint should have a certain width. The small widths of various types of rubber joints specified in the specification are determined by various factors.
3. Silicone weathering sealant for stone curtain wall panel joints requires proof of pollution resistance test. Because the stone has pores, some substances in the sealant will penetrate into the stone interior, causing pollution and affecting the look and feel.
(3) Other sealant glue joints
1. Fireproof sealant is used for joint sealing of floor and wall fire insulation layer, and also for glass joint sealing of glass curtain wall with fire protection requirements.
2. Butyl hot melt sealant is used for the first seal of insulating glass; polysulfide sealant is used for the second seal of the insulating glass of the exposed glass curtain wall. Jinhua tempered glass customization
3. "Epoxy adhesive for dry hanging stone curtain wall" is used for the bonding of slate and metal pendant.
(4) Rubber sealing strip
For rubber products of glass curtain wall, EPDM rubber, neoprene rubber and silicone rubber should be used. At present, the sealing of the domestic framed glass curtain wall mainly adopts the rubber sealing strip, and relies on the elasticity of the rubber strip itself to seal in the groove, and the rubber strip is required to have the characteristics of ultraviolet resistance, aging resistance, small deformation and pollution resistance. At present, the quality of rubber sealing strips on the market is not uniform. For example, the use of inferior rubber strips, aging and cracking of materials, etc., not only causes the curtain wall to leak, ventilate, but also the risk of falling off the glass. At present, the curtain wall design has a tendency to replace rubber seals with silicone weather-resistant sealants.
(5) Air seam and butt joint design
l. When the metal plate and the slate curtain wall adopt the hollow seam design, it must have waterproof measures, and there should be a drainage outlet that meets the design requirements.
2. The joint part of the glass frame wall of the exposed frame, the component of the unit glass curtain wall, and the opening part of the curtain wall, should be constructed by the rain curtain principle. Guideline construction measures shall be taken for areas where rainwater may be infiltrated and condensate may form. Since the joints between the unit components are formed by the interposition of the rods of the adjacent units, an inner and outer through hole will appear at the joint of the upper, lower, left and right units. According to the specification requirements, the anti-leakage sealing construction measures shall be taken for the intersection of vertical and horizontal joints. Wenzhou fire glass customization
(6) Curtain wall joints of the deformation joints of the building
The main building will have relative displacement on both sides of the deformation joint such as expansion joint, settlement joint and anti-seismic joint. When the curtain wall panel crosses the deformation joint, it is easy to break, so the curtain wall panel should not cross the deformation joint. The curtain wall design should be able to adapt to the requirements of the main building deformation.
(7) The joint between the building curtain wall and the awning and other prominent architectural structures Jinhua tempered glass customization
Waterproof and drainage design is required between the awning and other architectural structures that highlight the wall of the curtain wall. The steel beams of some light awnings are directly connected to the main structure through the curtain wall, and the joints with the curtain wall panels should be sealed. The drainage ditch and water outlet of the awning should be reasonably designed.
(8) Anti-corrosion and anti-noise design of the joints of the building curtain wall
1. In addition to stainless steel, joints between different metals should be properly placed with insulating gaskets or other anti-corrosion design to prevent bimetallic corrosion (referring to galvanic corrosion caused by different metals or other electronic conductors as electrodes) .
2. Seams between curtain wall components shall be taken to prevent friction noise. For example, the joint between the aluminum alloy column and the beam can be provided with a flexible gasket or a gap of 1 to 2 mm is reserved, and the gap is filled with glue; when the hook glass connection of the hidden frame glass curtain wall is used to fix the glass component, the hook contact surface should be flexible. Gasket. Wenzhou fire glass customization