More than a hundred years ago, the Royal Society of the United Kingdom made an aluminium cup more valuable than gold and presented it to the Russian chemist Mendeleev in recognition of his outstanding contributions to the field of chemistry. Until 1886, American scientists invented the smelting technology of electrolytic aluminum, this method of production, the production of aluminum metal before rapid growth, the price dropped significantly, from then on into the daily life of ordinary people.
Aluminum is the most abundant metallic element on earth, accounting for 7.5% of the total amount of the earth’s crust. Aluminum is currently the world’s most ideal green building structure materials, aluminum instead of wood can greatly reduce the deforestation to protect the green Earth’s forests and low carbon.
Aluminum has been used in the construction industry for more than 100 years, and was first used as a decorative material for buildings, such as door and window frames, glass curtain wall frames, building envelope aluminum panels, and building upright locking edge roofs. In the 1930s, aluminum alloy was used in the load-bearing and maintenance structure of buildings; nowadays, aluminum alloy has become the largest amount of construction metal materials besides steel, and about 27% of the world’s aluminum production is used in construction every year; at present, aluminum alloy is used more and more as a load-bearing structural material, such as bridges, storage, space structure, etc. Aluminum alloy can be divided into wrought aluminum and cast aluminum.
Aluminum alloys can be divided into two categories: wrought aluminum and cast aluminum. The former is the unmelted aluminum billet for hot or cold processing and forming, the latter is the molten aluminum liquid pouring into the mold and then casting it into shape, the structure commonly used aluminum alloy for wrought aluminum. Forged aluminum alloys are usually represented by a four-digit number, and the naming convention was proposed by the Aluminum Association of America (AA) in 1954. The strength, ductility, corrosion resistance, and other properties of forged aluminum alloys vary depending on their chemical composition (the amount of aluminum and other minor additions).
The 6xxx series, which contains magnesium and silicon, is a series of aluminium alloys with good corrosion resistance, similar strength to Q235 steel and is easy to extrude.
Until 2020, aluminum has been widely used in construction and real estate, electronic and electrical products, transportation and other applications. In particular, the introduction of aerospace aluminum has maximized the performance of aluminum. Aluminum has become a leader in the material and is highly sought after by people from all walks of life.
In the existing construction industry, aluminum was first used as a decorative building material, such as door and window frames, glass curtain wall frames, outsourcing aluminum panels, etc. Until the early 1930s, aluminum alloys began to be used in the load-bearing structure of buildings; and was instantly promoted and applied. Examples include bridges, storage, space structures, etc. This meant that aluminum was feasible as a building material, and aluminum alloys have proven to have good ductility and high strength, making them suitable for a variety of extreme environmental stress structures.
So, why do people prefer aluminum construction? Many answers say it’s because it has a better look and feel and has a higher value than steel buildings. That’s just one of the reasons. In fact, aluminum has incomparable advantages over steel.
- Aluminum alloy has a higher density than steel structure.
The density of aluminum alloy is only 1/3 of that of steel, while its specific strength and stiffness are higher than steel, making it typically an ideal lightweight material. For high-rise, large-span and thin shell structure, the weight of aluminum alloy space structure is much lighter than that of steel structure, so the basic investment of the structure is much less.
- Aluminum alloy is easier to extrude than steel structure.
Aerospace aluminum alloys are very soft, so unlike conventional steel structures that are commonly rolled, they can be made into precision structural components of various shapes and sizes. Compared to steel, aluminum alloys have good plasticity.
and formability, can be processed by various pressure methods (extrusion, rolling, forging, stamping, etc.).
Precision hollow and solid constant and variable section profiles, tubes, bars, plates, forgings, forgings and bent parts of various specifications and shapes in large quantities under hot or cold conditions.
In addition, the cross-sectional form of the components can be rationalized.
Without the need for precision mechanical processing, it can meet the requirements of any building structure. This is something that cannot be achieved by hot rolling, cold rolling, extrusion or welding of steel.
- Aluminum alloy is more corrosion resistant than steel structure.
Compared with steel structure, one of the main advantages of aluminum alloy structure is corrosion resistance, durability, less anti-corrosion workload in the life of the building, low cost of protection and maintenance, and at the same time will not affect the normal production and operation and use of corrosion maintenance.
Aluminum alloy structure green buildings are widely used in the environment with high humidity, acid rain, climate change or coastal areas.
- Aluminum alloy has higher recycling value than steel structure.
Recyclable and recyclable is a truly green material. The recycling cost of aluminum alloy material is very low, and its energy consumption is only 5% of that of electrolytic aluminum. It can be recycled again with high utilization rate, the recovery rate can reach over 90% (more than 5 times of steel recovery rate), and the price difference between aluminum ingot and aluminum is not big, so it is a typical green environmental protection material.
- Aluminum alloy saves more land and construction cost than steel structure.
In the case of the same span, the structural section is greatly reduced (about 1/8 of the cross-section of a steel structure), which can increase the usable area of the building by about 6%, reduce space waste by about 10%, and save land and energy. At the same time, it can greatly reduce the construction cost of the building.