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Basic Knowledge Of Aluminum Veneer Ceiling

2019-05-09

The aluminum curtain wall is a newly developed curtain wall that adopts high-quality aluminum alloy sheet as the substrate and has been molded through the CNC bending technology. Its surface is sprayed with decorative paint. 

The aluminum curtain wall adopts the specified 1100H24、1060H24、3003H24、5005H24, etc. single-layer aluminum alloy curtain wall.

The aluminum plate is mainly composed of panels, ribs and corner connection. The largest molding workpiece size can be up to 6000mm×1800mm (L×W). If the plate needs to be enlarged, it should be welded and then assembled, but it will be less effective than a whole piece.

The American PPG, Valspar from the US, AkzoNobel from the Netherlands and KCC from Korea, etc.are adopted as its coating. The coating is made through the process of two times of coating and one time of baking, or the process of three times of coating and two times of baking. Its coating performance meets the AAMA 2605-98 standard of AAMA (American Construction and Manufacturing Association) and ASCA (American Building Spray Association). Nowadays, some domestic paint has reached international standards and has even surpassed certain international brands. 

Conventional thickness of the aluminum veneer: 1.5mm, 2.0mm, 2.5mm, 3.0mm.

Common specifications: 1300mm*4000mm. Due to the design requirements of the project, it is also possible to make a plate type larger than the conventional size. However, due to the limitation of the substrate, generally, only an ultra-wide plate with a width of 1.5m can be made. If the width of the board exceeds 1.3m, it takes longer to produce and the price will be much higher. Also, the processing difficulty will be much higher.

 

 

Features of aluminum veneer

1. Light weight, good rigidity and high strength. The 3.0mm aluminum plate weighs about 8kg per square meter. Its tensile strength is 100-280n/mm2.

2. Great durability and corrosion resistance. It adopts the PVDF fluorocarbon paint that takes the Kynar-500 and hylur500 as the base materials, which will not fade for over 25 years.

3. Good manufacturability. It is processed and then painted. Aluminum sheets can be machined and then shaped into a variety of complex geometric shapes with flat, curved or spherical surfaces.

4. Uniform coating, diverse colors. The advanced electrostatic spraying technology makes the paint adhere to the aluminum plate evenly. Also, a wide range of colors can be selected.

 

5.Not easy to stain, easy to clean and maintain. The non-adhesive property of the fluorine coating film makes the contaminant difficult to stick to it, thus making it have good cleanliness.

6. Easy and quick installation and construction. The aluminum sheet is produced at the factory and does not need to be cut at the construction site. It only needs to be fixed on the skeleton.

7. Recyclable, environmentally friendly. The aluminum plate can be 100% recyclable with high residual value and is different from the decorative materials such as glass, stone, ceramics and aluminum-plastic board.

 

Application of aluminum panel

1. Exterior walls, beams, balconies, canopies

2. Airports, stations, hospitals

3. Conference halls, opera houses

4. Sports venues

5, Reception halls and other high-rise buildings

 

Features of aluminum curtain wall

1)The aluminum curtain wall is lightweight and has good rigidity and high strength. The aluminum curtain wall has good corrosion resistance and it is painted with fluorocarbon paint, which does not fade for up to 25 years.

2)The aluminum curtain wall has good manufacturability. It is processed and then painted. Aluminum sheets can be machined and then shaped into a variety of complex geometries with flat, curved or spherical surfaces.

3)The aluminum curtain wall is not easy to stain and is easy to clean and maintain. The non-adhesive property of the fluorine coating film makes the contaminant difficult to stick to it, thus making it have good cleanliness.

4)The aluminum curtain wall is endowed with easy and quick installation and construction. The aluminum sheet is produced at the factory and does not need to be cut at the construction site. It only requires simple fixation.

5) The aluminum curtain wall is recyclable and environmentally friendly. The aluminum plate can be 100% recyclable with a high recovery value.

The aluminum curtain wall has a unique texture and rich and long-lasting color. Moreover, the appearance and shape can be diversified, and it can be perfectly combined with glass curtain wall materials and stone curtain wall materials. Its perfect appearance and excellent quality are highly favored by its owner. It is lightweight and its weight only accounts for one-fifth of the marble weight and one-third of the weight of the glass curtain wall, which significantly reduces the load on the structure and foundation of buildings. Moreover, its maintenance cost is low and the cost performance is high.

As far as aluminum curtain walls currently used in China are concerned, most of them are composite aluminum plates and aluminum alloy plates.

The composite aluminum plate is formed by the rolling and heat-sealing of the 0.5 mm pure aluminum plate in the inner and outer layer(0.2 to 0.25 mm for indoor application) and the polyethylene (PE or polyvinyl chloride PVC) with a thickness of 3 to 4mm in the middle layer. The product is a flat plate with a certain specification such as 1220mm×2440mm. The fluorocarbon paint is sprayed on the surface of the external composite aluminum plate through roller painting, rolling and heat sealing. The thickness of the coating is generally about 20 micrometers. The composite aluminum plate features light weight and has the advantage of smooth surface, good flatness. And there is no color difference in the same direction, and it has excellent on-site processing, which provides conditions for dealing with changes in external wall dimensions caused by on-site construction errors, reducing the processing cycle time in workshops and shortening installation period.

The composite aluminum sheet materials should be processed into a wall panel during installation. First, it is necessary to cut the board according to the size of the secondary design. When cutting the board, the edge size that should be added will be taken into consideration. Generally, about 20 mm will be added on each side. According to the curtain wall installation company, the finished product rate of the board is generally 60% to 70%. The four sides of the composite board that has been cut need to be grooved, that is, the inner aluminum layer and the plastic layer should be cut to a certain width. Then, only the outer aluminum plate with a thickness of 0.5 mm is left, and its edge is folded into a 90-degree angle. The aluminum profile is adopted to make the frame of the same size, which will be placed in the curved groove of the aluminum composite panel. The bottom surface of the frame is bonded with the back of the aluminum-plastic panel with the help of the structural adhesive. The folded four sides are fixed to the outside of the frame by riveting. Usually, the reinforcing ribs are also installed in the frame to ensure the mechanical strength of the wallboard. The reinforcing rib is made of aluminum and bonded together with structural adhesive. Some informal practices are as follows: The corner of the composite board is only fixed with the angle aluminum and the reinforcing ribs are bonded with the double-sided tape, which greatly compromises the firmness.

Aluminum alloy veneers are generally 2 to 4 mm. When making the finished wallboard, the panel beating is first carried out according to the requirements of the secondary design, and the edge is directly folded. The four corners are welded under high pressure to form closed grooves. The position of the fixed bolts for the reinforcing ribs is reserved by means of electric welding and nailing on the back of the wallboard. After the panel beating work is completed, the fluorocarbon paint will be sprayed. The spraying method is generally divided into two times of spraying and three times of spraying, and the thickness of the paint film is 30 to 40 micrometers. Aluminum alloy veneers can be easily machined into curved shapes and processed with multiple hems or acute angles, which can meet the needs of today's ever-changing exterior wall decoration. And they are rich in color so their color can be chosen freely according to the design and the owner's requirements, which really broadens the range of architects' design choices.

 

Composite aluminum plate - Manufactured through the rolling and heat sealing of two layers of 0.5mm pure aluminum plate sandwiched with PVC or PET plastics.

Aluminum alloy plate - 2 ~ 3mm aluminum alloy plate.

Fluorocarbon coating

 

Composite aluminum plate - Manufactured through one-time rolling. The thickness of the coating is generally 20 microns.

Aluminum alloy veneer - 2 or 3 times of spraying. The coating thickness is generally 30 ~ 40 microns.

 

Color

Composite aluminum plate - Less choice of color; generally the gray is applied. Only when the order quantity is large, specific colors can be offered. Thus, it is difficult to obtain. The color consistency is great but only in the same direction, which reduces the rate of finished products.

Aluminum alloy plate - Color can be freely selected according to the design and the owner's requirements.


Service life  

Composite aluminum plate - About 10 years.

Aluminum alloy plate - For more than 50 years.

 

Leakproofness

Composite aluminum plate - Four corners with the open shape.

Aluminum alloy plate - Four corners welded tightly.

 

Wind resistance 

Composite aluminum plate - Poor resistance to wind pressure and deformation.

Aluminum alloy plate - Good wind pressure resistance and deformation resistance.

 

Weather resistance

Composite aluminum plate - The difference in the expansion coefficient between the aluminum plate and the plastic is large, which is likely to cause foaming and peeling.

Aluminum alloy plate - The same material. The wall panel will not be affected by temperature change.

 

Lightning protection

Composite aluminum plate - Not resistant to lightning strikes. The strong current is difficult to achieve ground connection through the composite aluminum plate. A 0.5mm thick aluminum plate can be broken down.

Aluminum alloy plate - It can be used as a great conductor of electricity, and the lightning current is quickly transmitted to the underground through the building’ s grounding system.

 

Wall plate shape

Composite aluminum plate - Due to material limitations, it is suitable for being processed into a plate with simple shapes and not suitable for being processed into a plate with folding corners. If its folding angle is less than 90°, it is prone to breakage.

Aluminum alloy plate - It is easy to be processed into a special-shaped plate with a large bending angle.

 

Machinability 

Composite aluminum plate - It can be processed on site to cope with dimensional changes caused by on-site construction errors.

Aluminum alloy plate - Made by the production plant. It has no on-site construction error and has high requirements for the secondary design.

 

Rate of finished products

Composite aluminum plate - Generally 60% to 70%.

Aluminum alloy plate - 100%.

 

Rate of finished products 

Composite aluminum plate - It adopts on-site manual operation to dig grooves. If the depth of the groove is not well controlled, the outer aluminum plate will be damaged and the bending part will be broken, resulting in waste products. The rate of finished products is generally 96% to 98%.

Aluminum alloy plate - Produced by the manufacturing plant with a yield of 100%.

 

Construction quality

Composite aluminum plate - The wall plate is mostly processed on site, so the quality control conditions are poor. There might be the phenomenon of cheating on workmanship and materials or the production of shoddy goods. And the quality of the wallboard will affect the quality of the construction.

Aluminum alloy plate - The plant controls the production quality according to international standards. The quality of the wallboard is reliable, which provides a prerequisite for ensuring the quality of the construction.

 

Scope of application

Composite aluminum plate - Suitable for facade decoration, elevated corridors, pedestrian bridges, low-rise curtain walls.

Aluminum alloy plate - Suitable for high-rise curtain wall and large-area curtain wall

 

Environmental protection 

Composite aluminum plate - It will generate harmful gases when exposed to high temperatures. It is also not fireproof and non-recyclable.

Aluminum alloy plate - It is fireproof, recyclable and environmentally friendly.

 

Related product standards

Aluminum plate strips reach the national standard (GB/T 3880-2006), ) which is a uniform standard for aluminum alloy strip materials.

 

Several problems that should be paid attention to in the application of aluminum curtain wall

1、Deformation resistance of curtain wall system

Scientific mechanical calculations must be carried out for each important part of the curtain wall system, taking into account the effects of wind pressure, dead load, earthquake, temperature, etc. on the curtain wall system. The embedded parts, the connection system, the keel system, the panels and the fasteners are carefully checked to ensure the safety of the curtain wall.

2、Whether to use the floating connection for the plate

The floating connection ensures the recovery capability of the curtain wall after deformation and ensures the integrity of the curtain wall so that the curtain wall will not deform under the applied force and the surface of the curtain wall will not bulge or dent.

3、Plate fixing method

The way the plates are fixed plays a decisive role in the flatness of the plates. The inconsistent force on each fixed point of the plate will cause the deformation of the face bar, affecting the external decoration effect. Therefore, the fixing method of the plate must be interval fixation to ensure the flatness of the curtain wall surface.

4、Whether there are reinforcement measures applied at the side of the composite face bar. The folded edge of the composite face bar only has the same thickness as the front panel and has a lower thickness and lower strength. Therefore, reliable reinforcement measures must be applied to edge removal.

5、Whether the reinforcing ribs are properly applied on the back of the plate to increase the strength and rigidity of the plate surface. The installation distance, strength and rigidity of the reinforcing ribs must meet the requirements to ensure the function and safety of the curtain wall.

6、Whether the waterproof sealing method is reasonable. There are various waterproof sealing methods including structural waterproofing, internal waterproofing, and glue sealing. Different sealing methods will result in different pricing. An appropriate sealing method should be chosen for the project to ensure the function and external decoration effect of the curtain wall.

7、Whether the materials used meet the specifications, standards and design requirements.

At present, various building materials are flooding the construction market, and the quality of materials is not the same. Choosing qualified materials is the foundation for ensuring the quality of the curtain wall. Strict inspection methods must be applied to ensure the quality of the materials.

 

 

 

The market trend of the aluminum curtain wall

With the rapid growth of the market demand for domestic aluminum curtain wall, many foreign companies have entered the domestic market. With their domestic human resources advantage, domestic aluminum curtain wall manufacturers are also actively expanding into the international market. The industry is developing rapidly, and the trend of market internationalization is getting stronger. Experts said that in the next few years, the aluminum curtain wall industry will gradually enter a slow development period, and the market gradually displays eight major development trends.

First, the aluminum curtain wall market will continue to grow steadily.

At present, the construction industry has become China's consumption hotspot and economic growth point and the domestic demand will gradually increase. Under the impetus of the Beijing Olympic Games, the Shanghai World Expo, the Guangzhou Asian Games, China Western Development, the revitalization of the Northeast, the urban rebuilding of China and the new town construction, the total market of aluminum curtain wall will continue to grow.

Second, a market that is dominated by large enterprises and supported by small and medium enterprises is forming. At present, the aluminum curtain wall industry has formed a technological innovation system with more than 100 large enterprises as the main body and represented by more than 50 key enterprises with an output value of over 100 million yuan. The industrial output of these large-scale backbone enterprises accounts for about 50% of the total industrial output value of the industry. In the national key projects, large and medium-sized city image projects, urban landmark projects, foreign-funded projects and foreign projects, the enterprises have established a good market image for the whole industry and have become the main force of technological innovation, brand improvement and market development in the whole industry.

Third, affected by the energy conservation policy, there will be a great change in the structure of the domestic aluminum curtain wall. The aluminum alloy curtain wall still features the exposed frame, hidden frame and aluminum curtain wall; the unitized curtain wall has a promising development prospect in large and medium cities; the aluminum alloy double-layer curtain wall, the intelligent curtain wall and the sun visor curtain wall will gradually be perfected and improved. The market share of the aluminum curtain wall in the curtain wall market will remain above 55%, and there will be a great change in its product structure. Affected by the energy conservation policy for national buildings and the energy crisis, the utilization rate of the energy-saving and environmentally-friendly aluminum curtain wall will greatly increase.

Fourth, environmental protection and energy conservation will become the development theme of the aluminum curtain wall enterprises.

The 2008 Beijing Olympic Games put forward the three concepts of “Green Olympics, High-tech Olympics and People's Olympics”. The Olympic project should also be a green project of a high standard. With the advent of a well-off life, consumers have higher requirements for their living environment. The idea of green consumption has become the guiding idea in the construction consumer market, and green consumption has brought huge green business opportunities. Therefore, in order to meet the needs of green consumption and to develop high-performance and high-tech ecological curtain wall, we must not only consider the architectural appearance effect, the basic physical properties of the curtain wall and the construction cost but also integrate the overall design of the curtain wall with the ecological environment. We guarantee that the constructed curtain wall will have good performance and less environmental pollution, creating a comfortable environment for people.

Fifth, due to the small difference in aluminum panel curtain wall products, the competition is more intense. The competition in the aluminum panel curtain wall market is more violent. As the aluminum curtain wall industry has entered the initial stage of maturity and the competition is fierce, many enterprises have lower profits at present. The curtain wall market has been flooded with various products, and a diversified market structure is forming with aluminum, plastic, wood and steel as the main materials. The application of new materials and new technologies will lead to the emergence of more new products. Compared with other industries, the aluminum curtain wall has small product differentiation with more intense competition.

Sixth, due to the credit crunch, there will be the Matthew effect in large and small enterprises. The country’s macroeconomic policy control, bank credit crunch, and bank interest rate hikes have led to a vicious competition environment and the phenomenon of project mat endowment. Since the government requires all construction units to provide the wage guarantee system for migrant workers, the mat endowment of construction units will be increased, which objectively occupies a part of the cash flow, reduces the turnover rate of the company's funds and hinders the corporate capital turnover. On the one hand, the possibility of large aluminum curtain wall enterprises obtaining larger projects will increase, and small and medium-sized enterprises will encounter more hardship in their development. But on the other hand, small and medium-sized aluminum curtain wall enterprises can also utilize their own advantages to locate “short-period and fast turn-around” projects, increasing the turnover rate of funds.

Seventh, product development and technological innovation will become the core competitiveness of enterprises. We will implement product development more rationally and will comprehensively analyze and guide product development based on many factors such as the characteristics of local climate, the needs of local humanistic culture, the situation of economic development, the demand for energy conservation and environmental protection. At the same time, we will introduce and learn international advanced technologies and materials to conduct product development.

Eighth, the standardization and internationalization of competition. There is a group-oriented and standardized development trend in the industry, and the upper, middle and lower reaches of the industry is closely combined. Vertical integration: With resource advantages integrated, raw material manufacturers are expanding their business of production and installation of the curtain wall. Horizontal integration: Competition has made some companies recognize the importance of working together. Cooperation can contribute to market development, making companies make the most of their limited resources and advantages. It values both internal and external development and helps maintain a competitive advantage and form a coalition for common development.

 

Features of aluminum curtain wall

1)The aluminum curtain wall is lightweight and has good rigidity and high strength. The aluminum curtain wall has good corrosion resistance and it is painted with fluorocarbon paint, which does not fade for up to 25 years.

2)The aluminum curtain wall has good manufacturability. It is processed and then painted. Aluminum sheets can be machined and then shaped into a variety of complex geometries with flat, curved or spherical surfaces.

3)The aluminum curtain wall is not easy to stain and is easy to clean and maintain. The non-adhesive property of the fluorine coating film makes the contaminant difficult to stick to it, thus making it have good cleanliness.

4)The aluminum curtain wall is endowed with easy and quick installation and construction. The aluminum sheet is produced at the factory and does not need to be cut at the construction site. It only requires simple fixation.

5) The aluminum curtain wall is recyclable and environmentally friendly. The aluminum plate can be 100% recyclable with a high recovery value.

The aluminum curtain wall has a unique texture and rich and long-lasting color. Moreover, the appearance and shape can be diversified, and it can be perfectly combined with glass curtain wall materials and stone curtain wall materials. Its perfect appearance and excellent quality are highly favored by its owner. It is lightweight and its weight only accounts for one-fifth of the marble weight and one-third of the weight of the glass curtain wall, which significantly reduces the load on the structure and foundation of buildings. Moreover, its maintenance cost is low and the cost performance is high.

As far as aluminum curtain walls currently used in China are concerned, most of them are composite aluminum plates and aluminum alloy plates.

The composite aluminum plate is formed by the rolling and heat-sealing of the 0.5 mm pure aluminum plate in the inner and outer layer(0.2 to 0.25 mm for indoor application) and the polyethylene (PE or polyvinyl chloride PVC) with a thickness of 3 to 4mm in the middle layer. The product is a flat plate with a certain specification such as 1220mm×2440mm. The fluorocarbon paint is sprayed on the surface of the external composite aluminum plate through roller painting, rolling and heat sealing. The thickness of the coating is generally about 20 micrometers. The composite aluminum plate features light weight and has the advantage of smooth surface, good flatness. And there is no color difference in the same direction, and it has excellent on-site processing, which provides conditions for dealing with changes in external wall dimensions caused by on-site construction errors, reducing the processing cycle time in workshops and shortening installation period.

The composite aluminum sheet materials should be processed into a wall panel during installation. First, it is necessary to cut the board according to the size of the secondary design. When cutting the board, the edge size that should be added will be taken into consideration. Generally, about 20 mm will be added on each side. According to the curtain wall installation company, the finished product rate of the board is generally 60% to 70%. The four sides of the composite board that has been cut need to be grooved, that is, the inner aluminum layer and the plastic layer should be cut to a certain width. Then, only the outer aluminum plate with a thickness of 0.5 mm is left, and its edge is folded into a 90-degree angle. The aluminum profile is adopted to make the frame of the same size, which will be placed in the curved groove of the aluminum composite panel. The bottom surface of the frame is bonded with the back of the aluminum-plastic panel with the help of the structural adhesive. The folded four sides are fixed to the outside of the frame by riveting. Usually, the reinforcing ribs are also installed in the frame to ensure the mechanical strength of the wallboard. The reinforcing rib is made of aluminum and bonded together with structural adhesive. Some informal practices are as follows: The corner of the composite board is only fixed with the angle aluminum and the reinforcing ribs are bonded with the double-sided tape, which greatly compromises the firmness.

Aluminum alloy veneers are generally 2 to 4 mm. When making the finished wallboard, the panel beating is first carried out according to the requirements of the secondary design, and the edge is directly folded. The four corners are welded under high pressure to form closed grooves. The position of the fixed bolts for the reinforcing ribs is reserved by means of electric welding and nailing on the back of the wallboard. After the panel beating work is completed, the fluorocarbon paint will be sprayed. The spraying method is generally divided into two times of spraying and three times of spraying, and the thickness of the paint film is 30 to 40 micrometers. Aluminum alloy veneers can be easily machined into curved shapes and processed with multiple hems or acute angles, which can meet the needs of today's ever-changing exterior wall decoration. And they are rich in color so their color can be chosen freely according to the design and the owner's requirements, which really broadens the range of architects' design choices.

 

Comparison of the performance of aluminum alloy curtain wall and composite curtain wall

Materials  

Composite aluminum plate - Manufactured through the rolling and heat sealing of two layers of 0.5mm pure aluminum plate sandwiched with PVC or PET plastics.

Aluminum alloy plate - 2 ~ 3mm aluminum alloy plate.

 

Fluorocarbon coating

Composite aluminum plate - Manufactured through one-time rolling. The thickness of the coating is generally 20 microns.

Aluminum alloy veneer - 2 or 3 times of spraying. The coating thickness is generally 30 ~ 40 microns.

 

Color

Composite aluminum plate - Less choice of color; generally the gray is applied. Only when the order quantity is large, specific colors can be offered. Thus, it is difficult to obtain. The color consistency is great but only in the same direction, which reduces the rate of finished products.

Aluminum alloy plate - Color can be freely selected according to the design and the owner's requirements.

 

Service life

Composite aluminum plate - About 10 years.

Aluminum alloy plate - For more than 50 years.

 

Leakproofness

Composite aluminum plate - Four corners with the open shape.

Aluminum alloy plate - Four corners welded tightly.

 

Wind resistance

Composite aluminum plate - Poor resistance to wind pressure and deformation.

Aluminum alloy plate - Good wind pressure resistance and deformation resistance.

 

Weather resistance

Composite aluminum plate - The difference in the expansion coefficient between the aluminum plate and the plastic is large, which is likely to cause foaming and peeling.

Aluminum alloy plate - The same material. The wall panel will not be affected by temperature change.

 

Lightning protection

Composite aluminum plate - Not resistant to lightning strikes. The strong current is difficult to achieve ground connection through the composite aluminum plate. A 0.5mm thick aluminum plate can be broken down.

Aluminum alloy plate - It can be used as a great conductor of electricity, and the lightning current is quickly transmitted to the underground through the building’ s grounding system.

 

Wall plate shape

Composite aluminum plate - Due to material limitations, it is suitable for being processed into a plate with simple shapes and not suitable for being processed into a plate with folding corners. If its folding angle is less than 90°, it is prone to breakage.

Aluminum alloy plate - It is easy to be processed into a special-shaped plate with a large bending angle.

 

Machinability

Composite aluminum plate - It can be processed on site to cope with dimensional changes caused by on-site construction errors.

Aluminum alloy plate - Made by the production plant. It ensures no on-site construction error and has high requirements for the secondary design.

 

Rate of finished products

Composite aluminum plate - Generally 60% to 70%.

Aluminum alloy plate - 100%.

 

Rate of finished products

Composite aluminum plate - It adopts on-site manual operation to dig grooves. If the depth of the groove is not well controlled, the outer aluminum plate will be damaged and the bending part will be broken, resulting in waste products. The rate of finished products is generally 96% to 98%.

Aluminum alloy plate - Produced by the manufacturing plant with a yield of 100%.

 

Price

Construction quality

Composite aluminum plate - The wall plate is mostly processed on site, so the quality control conditions are poor. There might be the phenomenon of cheating on workmanship and materials or the production of shoddy goods. And the quality of the wallboard will affect the quality of the construction.

Aluminum alloy plate - The plant controls the production quality according to international standards. The quality of the wallboard is reliable, which provides a prerequisite for ensuring the quality of the construction.

 

Application range

Composite aluminum plate - Suitable for facade decoration, elevated corridors, pedestrian bridges, low-rise curtain walls.

Aluminum alloy plate - Suitable for high-rise curtain wall and large-area curtain wall

 

Environmental protection

Composite aluminum plate - It will generate harmful gases when exposed to high temperatures. It is also not fireproof and non-recyclable.

Aluminum alloy plate - It is fireproof, recyclable and environmentally friendly.

 

Related product standards

Aluminum plate strips reach the national standard (GB/T 3880-2006), ) which is a uniform standard for aluminum alloy strip materials.

 

  Several problems that should be paid attention to in the application of aluminum curtain wall

1、Deformation resistance of curtain wall system

Scientific mechanical calculations must be carried out for each important part of the curtain wall system, taking into account the effects of wind pressure, dead load, earthquake, temperature, etc. on the curtain wall system. The embedded parts, the connection system, the keel system, the panels and the fasteners are carefully checked to ensure the safety of the curtain wall.

 

2、Whether to use the floating connection for the plate

The floating connection ensures the recovery capability of the curtain wall after deformation and ensures the integrity of the curtain wall so that the curtain wall will not deform under the applied force and the surface of the curtain wall will not bulge or dent.

 

3、Plate fixing method

The way the plates are fixed plays a decisive role in the flatness of the plates. The inconsistent force on each fixed point of the plate will cause the deformation of the face bar, affecting the external decoration effect. Therefore, the fixing method of the plate must be interval fixation to ensure the flatness of the curtain wall surface.

 

4、Whether there are reinforcement measures applied at the side of the composite face bar.

The folded edge of the composite face bar only has the same thickness as the front panel and has a lower thickness and lower strength. Therefore, reliable reinforcement measures must be applied to edge removal.

 

5、Whether the reinforcing ribs are properly applied on the back of the plate to increase the strength and rigidity of the plate surface. 

The installation distance, strength and rigidity of the reinforcing ribs must meet the requirements to ensure the function and safety of the curtain wall.

 

6、Whether the waterproof sealing method is reasonable.

There are various waterproof sealing methods including structural waterproofing, internal waterproofing, and glue sealing. Different sealing methods will result in different pricing. An appropriate sealing method should be chosen for the project to ensure the function and external decoration effect of the curtain wall.

7、Whether the materials used meet the specifications, standards and design requirements.

At present, various building materials are flooding the construction market, and the quality of materials is not the same. Choosing qualified materials is the foundation for ensuring the quality of the curtain wall. Strict inspection methods must be applied to ensure the quality of the materials.

 

The market trend of the aluminum curtain wall   

With the rapid growth of the market demand for domestic aluminum curtain wall, many foreign companies have entered the domestic market. With their domestic human resources advantage, domestic aluminum curtain wall manufacturers are also actively expanding into the international market. The industry is developing rapidly, and the trend of market internationalization is getting stronger. Experts said that in the next few years, the aluminum curtain wall industry will gradually enter a slow development period, and the market gradually displays eight major development trends.

First, the aluminum curtain wall market will continue to grow steadily. At present, the construction industry has become China's consumption hotspot and economic growth point and the domestic demand will gradually increase. Under the impetus of the Beijing Olympic Games, the Shanghai World Expo, the Guangzhou Asian Games, China Western Development, the revitalization of the Northeast, the urban rebuilding of China and the new town construction, the total market of aluminum curtain wall will continue to grow.

 

Second, a market that is dominated by large enterprises and supported by small and medium enterprises is forming. At present, the aluminum curtain wall industry has formed a technological innovation system with more than 100 large enterprises as the main body and represented by more than 50 key enterprises with an output value of over 100 million yuan. The industrial output of these large-scale backbone enterprises accounts for about 50% of the total industrial output value of the industry. In the national key projects, large and medium-sized city image projects, urban landmark projects, foreign-funded projects and foreign projects, the enterprises have established a good market image for the whole industry and have become the main force of technological innovation, brand improvement and market development in the whole industry.

 

Third, affected by the energy conservation policy, there will be a great change in the structure of the domestic aluminum curtain wall. The aluminum alloy curtain wall still features the exposed frame, hidden frame and aluminum curtain wall; the unitized curtain wall has a promising development prospect in large and medium cities; the aluminum alloy double-layer curtain wall, the intelligent curtain wall and the sun visor curtain wall will gradually be perfected and improved. The market share of the aluminum curtain wall in the curtain wall market will remain above 55%, and there will be a great change in its product structure. Affected by the energy conservation policy for national buildings and the energy crisis, the utilization rate of the energy-saving and environmentally-friendly aluminum curtain wall will greatly increase.

 

Fourth, environmental protection and energy conservation will become the development theme of the aluminum curtain wall enterprises.

The 2008 Beijing Olympic Games put forward the three concepts of “Green Olympics, High-tech Olympics and People's Olympics”. The Olympic project should also be a green project of a high standard. With the advent of a well-off life, consumers have higher requirements for their living environment. The idea of green consumption has become the guiding idea in the construction consumer market, and green consumption has brought huge green business opportunities. Therefore, in order to meet the needs of green consumption and to develop high-performance and high-tech ecological curtain wall, we must not only consider the architectural appearance effect, the basic physical properties of the curtain wall and the construction cost but also integrate the overall design of the curtain wall with the ecological environment. We guarantee that the constructed curtain wall will have good performance and less environmental pollution, creating a comfortable environment for people.

 

Fifth, due to the small difference in aluminum panel curtain wall products, the competition is more intense. The competition in the aluminum panel curtain wall market is more violent. As the aluminum curtain wall industry has entered the initial stage of maturity and the competition is fierce, many enterprises have lower profits at present. The curtain wall market has been flooded with various products, and a diversified market structure is forming with aluminum, plastic, wood and steel as the main materials. The application of new materials and new technologies will lead to the emergence of more new products. Compared with other industries, the aluminum curtain wall has small product differentiation with more intense competition.

 

Sixth, due to the credit crunch, there will be the Matthew effect in large and small enterprises. The country’s macroeconomic policy control, bank credit crunch, and bank interest rate hikes have led to a vicious competition environment and the phenomenon of project mat endowment. Since the government requires all construction units to provide the wage guarantee system for migrant workers, the mat endowment of construction units will be increased, which objectively occupies a part of the cash flow, reduces the turnover rate of the company's funds and hinders the corporate capital turnover. On the one hand, the possibility of large aluminum curtain wall enterprises obtaining larger projects will increase, and small and medium-sized enterprises will encounter more hardship in their development. But on the other hand, small and medium-sized aluminum curtain wall enterprises can also utilize their own advantages to locate “short-period and fast turn-around projects”, increasing the turnover rate of funds.

 

Seventh, product development and technological innovation will become the core competitiveness of enterprises. 

We will implement product development more rationally and will comprehensively analyze and guide product development based on many factors such as the characteristics of local climate, the needs of local humanistic culture, the situation of economic development, the demand for energy conservation and environmental protection. At the same time, we will introduce and learn international advanced technologies and materials to conduct product development.

 

Eighth, the standardization and internationalization of competition. There is a group-oriented and standardized development trend in the industry, and the upper, middle and lower reaches of the industry is closely combined. Vertical integration: With resource advantages integrated, raw material manufacturers are expanding their business of production and installation of the curtain wall. Horizontal integration: Competition has made some companies recognize the importance of working together. Cooperation can contribute to market development, making companies make the most of their limited resources and advantages. It values both internal and external development and helps maintain a competitive advantage and form a coalition for common development.

 

 

 


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