Detailed introduction of aluminum magnesium manganese alloy roof panel
toyota1515 > 03-06-2018, 06:55 AM
Aluminum magnesium manganese alloy roofing system is very suitable for new, large industrial, commercial and civil buildings complex and changeable roof, waterproof, energy-saving, beautiful, durable, and can be produced in the field. The system is equipped with a fixed, node, standard parts and form a complete set of decoration, snow, fall prevention system, so its application is widely used in sports venues, conference and exhibition center, theaters and museums, culture and traffic facilities such as airports, railway stations, subway station and commercial buildings, such as civilian residential building's roof.
Roofing system is a very important part of the building, has the strict design requirements, must have: safety and durability, rain wind resistance, thermal insulation, sound insulation, noise reduction, aesthetically pleasing, easy maintenance, etc.
1. Aluminum magnesium and manganese alloy roofing system.
A typical roofing system structure of aluminum magnesium and manganese alloy is constructed.
Magnesium aluminum manganese alloy roofing system structure, from bottom to top respectively: roof floor: the perforated aluminum zinc plating or galvanized steel sheet, according to the thickness of purlin distances to design, perforation rate is obtained according to the project calculation.
Roof purline: Z275 galvanized purline.
Dustproof layer: for non - woven cloth, mainly used for dust - proof, laid on the roof surface.
Absorbent cotton: glass wool is usually used, and its bulk and thickness are determined according to the calculation.
Vapor barrier: can be laid separately, or glass wool (with moisture-proof veneer); The isolation layer is often used in polyester film and high density polyethylene film.
Roof subpurline: Z275 galvanized purline.
Insulation and insulation layer: rock wool is usually used, and its thickness is determined according to calculation.
Waterproof breathable membrane: for high density polyethylene non-woven, block wind and rain on the building structure, at the same time of strengthening the building air tightness, water tightness, also can provide unique permeability, rapid discharge and water of the retaining structure internal, effectively avoid the mold and the formation of condensation water.
Aluminum alloy fixed seat (T shaped code) : fixed on the roof subpurline, used to fix the aluminum magnesium manganese alloy roof panel.
Aluminum magnesium manganese alloy roof panel: the thickness is usually 0.9mm, 1.0mm, 1.2mm.
1.2 characteristics and advantages of aluminum magnesium and manganese alloy roofing system.
1.2.1 base material anti-corrosion, strong durability.
1) adopt the brand AA3004 aluminum magnesium manganese alloy, which has a strong anti-corrosion property;
2) surface damage caused by transportation or construction does not affect its anti-corrosion performance;
3) certified by the national bureau of standards: the service life of this product in ordinary environment is not shorter than 40 years.
1.2.2 reliable waterproof performance.
1) the fixed mode adopts the hidden button and mechanical lock, without any screws to go through the roof to avoid the hidden trouble;
2) the maximum utilization of the cross-sectional area of the panel is drained and the drainage efficiency is high. Compared with ordinary metal pressure plate drainage capacity,
3) the transverse lap joint adopts the special reaming machine hinge, the sealing is good, and has the anti-capillary action measure;
4) adopt sliding fixed seat to avoid damage of panel due to temperature deformation.
5) adopt mobile pressure type equipment, break the restriction of the transportation condition to the plate length, and reduce the longitudinal overlap of the plate;
6) aluminum alloy roofing plate and flood water permit welding, and improve the waterproofing of roof opening.
1.2.3 good modeling adaptability.
1) the aluminum magnesium and manganese alloy materials are of considerable strength and flexibility, especially suitable for the roof of three-dimensional curved surface and other complex shapes;
2) unique fan board, bending plate and fan bending plate production technology, can ensure the waterproof capability while achieving the perfect design modeling.
1.2.4 the material is beautiful and easy to use.
1) the original color panel has a strong metallic luster;
2) can be coated with PE or PVDF coating to meet the color requirements of design and use;
3) no washing and maintenance is required during use.
1.2.5 field pressure type production mode.
High flexibility, it is convenient to adjust production parameters according to the construction site conditions, which can shorten the production cycle and ensure the product quality.
1.3 standard parts and tools for the roofing system of aluminum magnesium manganese alloy.
1.3.1 fixed support.
The fixed support height can be selected according to the construction requirements, commonly used for: 81 mm, 106 mm, 116mm and 156 mm, with 6mm thick thermal insulation pad under the support. The standard support width is 58 mm; The width of the double width is 116mm. Fixed support.
1.3.2 accessories
1) mountain wall node accessories.
2) eaves gutter and eaves node accessories.
Accessories used for eaves and eaves.
3) 1.3.3 tools.
1) electric locking machine, used for locking plate ribs, making the plate firmly connected with the fixed seat.
2) manual locking machine, before using electric locking machine, lock the plate end with manual lock, so as to enter the position of the electric lock.
1.4 function guarantee of aluminum magnesium manganese alloy roofing system.
1.4.1 sound absorption and sound insulation.
1) absorption
The system USES the sound absorption material to adjust the sound field distribution to eliminate the echo.
Solution: roof bottom perforation + laying of sound absorbing material (non-woven absorbent cloth and fiberglass cotton), perforating floor type.
2) sound insulation
Designed to isolate outdoor noise sources.
Solution: choose the right roof structure and material quality (the quality is doubled and the sound insulation is increased by 6 db); A double-layer or multi-layer roof structure with an air interlayer is adopted, and the rigid connection between the two layers is minimized (that is, the acoustic bridge), so as to avoid the reduction of the additional sound insulation.
1.4.2 insulation.
It is required to control the inner surface temperature of the enclosure structure not lower than the indoor temperature, so as to ensure the surface is not exposed.
1) causes of cold condensation.
Because the surface temperature of the object is lower than ** temperature. In the steel structure, the metal enclosure is connected with the purline by fasteners. If no special treatment is taken, there will be a condensation phenomenon in the part where the metal is connected. When there is a lining board, the temperature of the lining board is reduced due to the cold bridge, and the water vapor is difficult to pass through the lining board, so there are obvious water drops on the lining board.
2) the harm of cold condensation dew.
Make the insulation performance of the insulation cotton change, water vapor may cause the surface dripping, causing the surface to rust; The contact of water vapor and steel components can lead to corrosion and shorten the service life of roof.
3) cold condensation design.
Set the insulation layer: it should be arranged on the side of the water vapor flow, so the heating house should be placed inside the insulation layer, and the cold storage building should be arranged in the outer layer of the insulation layer. The material selection is ideal with polypropylene sandwich, while aluminum foil is easy to rust when it has water vapor and should be avoided. Set layer or discouraged channel between ventilation: thermal insulation layer between the lateral and roof plate layer between the ventilation, if any, from indoor into steam, can be continuously with outdoor air flow away, the thermal insulation layer can have the effect of drying.
2. Aluminum magnesium and manganese alloy roofing board.
2.1 the material
2.1.1 aluminum alloy
The aluminum alloy has 9 serial number, among which 1XXX, 3XXX and 5XXX are widely used in the construction field. 1XXX is 99.9% or higher purity aluminum; The manganese in the 3XXX system is the main alloy element. These alloys are generally not heat-treatable, but they are more than 20% higher than the strength of the 1XXX alloy. 5 XXX series magnesium is the main alloy elements, is a moderate to high intensity work hardening alloy and has good welding performance, and in the Marine environment has good corrosion resistance in the air. Building roof and wall panel used in the field of aluminum alloy, mainly 3 XXX department of magnesium aluminum manganese alloy is given priority to, this is because the 5 XXX series alloy hard, and stand side bite type is required for a roof plate making multiple deformation, so the processing performance good 3 XXX department of material will be the first choice of the material.
2.1.2 roof panel substrate.
The roof panel is usually made of the aluminum magnesium manganese alloy with the international brand AA3004, and the alloy status is h36/h46. The yield strength is greater than 190 MPa, the tensile strength is 240~285 MPa, and the elongation is greater than or equal to 3%. The base material of the receiving plate is made of aluminum magnesium and manganese alloy with the international brand AA3004. The alloy state is H34/H44, its yield strength is 170MPa, and the tensile strength is 220~265 MPa, and the elongation is greater than or equal to 3%.
Main component content of aluminum magnesium manganese alloy plate (AA3004) : Si is less than 0.3%; Fe 0.7% or less. Cu 0.25% or less. With recent < 0.25%; Mn is 1.0% ~ 1.0%; Mg is 0.8% ~ 0.8%; The rest is Al.
2.1.3 coating of aluminum magnesium manganese alloy plate.
Commonly used coatings include: original color hammer grain, polyester (PE) paint coating, fluorocarbon (PVDF) spray paint coating.
PVDF coating: good wear resistance and excellent electrical performance; With excellent anti-ultraviolet linearity; Good weathering resistance, flame resistant, oil resistant and chemical resistant.
PVDF coating system is divided into two types:
1) early roller coating aluminum plate: preliminary roller paint used in the basic material content of PVDF is as high as 70%, the level of automation 2 second baked or three three roasting roller coating technology, each coating are required to pass through again after baking curing coating; The compactness and anti - corrosion and aging resistance of three - coated three - baked coating are much better than two - coating.
2) ordinary spray aluminum plate: usually two or three coated baking coating is used, the process is finished by manual operation, the coating's adhesion and the surface color difference are inferior to the preroll coating.
2.2 aluminum magnesium manganese alloy roof panel type.
In order to meet the requirement of building roof, the aluminum magnesium manganese alloy roofing board has the following plate type in engineering application.
2.2.1 plate type
1) a straightforward
The straight plate rib height is generally 65 mm, and the commonly used plate width is 300mm, 400mm and 500mm (figure 9). The plate width 300mm is used when the roof load is large; The 400 mm is commonly used, economic type; The 500 mm is the most economical plate type of the roof panel, but the lower purline spacing is small, and appropriate measures should be taken to prevent plate deformation.
2) curved plate
The curved plates include both the positive arc plate and the arc plate.
Natural bending parameters of curved plate.
Curved plate machine bending, bending parameters.
3) sector plate
The sector plate includes the straight sector plate, the positive sector plate and the anti-sector plate.
2.2.2 application scope of various types of plates.
1) straight plate: suitable for single roof with single slope, double slope and radius greater than natural arc radius;
2) positive and reverse arc plate: suitable for single roof with radius less than natural arc radius;
3) fan board and fan arc plate: suitable for hyperbolic roof;
4) special case: the straight board is used on the hyperboloid, the roof curvature is small, and the roof is allowed to make multiple roof ridge.
The construction case of aluminum magnesium manganese alloy roofing board is applied.
2.3 technical parameters of aluminum magnesium and manganese alloy roof panel and lock edge.
2.3.1 production length: 11.5 m> transport length >1 m, or field pressure type.
2.3.2 machining error of aluminum magnesium manganese alloy roofing plate.
Width: plus or minus 2 mm;
Length: < 10 m, +10 mm/-5 mm; When > 10m, +10mm + (1 mm/m) /-5 mm.
2.3.3 margin error.
The edge diameter = 20mm + 0.3mm / -0.7mm.
2.4 basic design principle of aluminum magnesium manganese alloy plate
The board thickness, plate width and span of roof board shall be determined by calculation.
Ensure that each roof panel and side board are retractable;
The fixed point of the roof board shall be calculated, and according to the calculated data, the method of fixing the fixed point shall be: one or two rivets, or one bolt, and several self-tapping nails shall be directly fixed to the structure;
In the lower part of the welding section of the roof, it shall be supported by galvanized steel plate with a thickness of not less than 1.5mm.
The lap length of the side panel is usually 200 mm.
3. Supporting system of aluminum magnesium manganese alloy roofing system.
3.1 roof decorative board system.
The attachment of the decorative plate system is fixed, no need to make holes in the aluminum magnesium manganese alloy plate; The open connection between the two layers is not maintained, and the cleaning requirements can be reduced. Adjustable system to make the decoration plate perfect layout, decorative plate layout.
3.2 roof blocking system.
The roof of the northern area generally needs to set up the snowboard. The snowboard is made of stainless steel or aluminum alloy. The snowboard can be arranged according to the basic snow pressure and slope of the roof. The snow board must be set up above the gutter and the eaves.
3.3 roof anti-falling system.
Regular inspection of the roof, cleaning of the roof after the snowstorm, and roofing and roof modification, all require the roof to set up the fall system. The anti-falling system includes a solid, durable and flexible stainless steel cable that connects each end of the stainless steel cable to the roof mounting bracket. The roof is fixed with an aluminum clip attached to the roof panel. The roof fixed base is designed as a shock absorber, and once the fall occurs, the deformation reduces the vibration of the fall, and the support base is still securely attached to the roof panel.
According to the requirements of the specific project, the intermediate fixed base shall be set on the stainless steel cable every 5 m or 7 m.
Four, conclusion
Magnesium aluminum manganese alloy as a new type of roofing system building roofing containment system, both in energy saving, beautiful, durable and modelling reached a new level, at the same time can be flexibly and freely, so as to adapt to the layout design of any building, geometric shapes, and size. Now the system has been widely used in airport, aircraft maintenance base, station and large transport hub, conference and exhibition center, stadiums, exhibition hall, large public entertainment facilities, construction of public service, large shopping centers, commercial facilities, such as civilian residential buildings, its application has become increasingly widespread