At present, Many construction people start to talk about aluminum alloy formwork constantly, which has many advantages, and even that it can replace the plywood, bamboo formwork, steel formwork and so on. We are a professional manufactrurer of Aluminium formwork, by comparing plywood and aluminum formwork. The reason why aluminum formwork can get considerable application and development is mainly because it has many advantages compared with other building formwork.
1.Aluminum formwork has been used for 50 years since it was born in the United States in 1962. In the United States, Canada and other developed countries, as well as Mexico, Brazil, Malaysia, South Korea, India and other emerging industrial countries, have been widely used in the building. Aluminum formwork in China has only been developed for a few years, has been favored by many builders. aluminum formwork application technology is becoming mature. China’s real estate development from the golden age to the silver age now, major real estate developers are not only fighting for money, time, but also the application of new technology. It is because of the fast and efficient aluminum formwork, now the domestic major developers are competing to promote the application of aluminum formwork.
2, aluminum formwork system introduction
Aluminum formwork system is composed of formwork system, reinforcement system, support system and auxiliary system. The standard formwork system is made of aluminum alloy profiles, instead of the traditional plywood, with light, high strength, all stable and quick assembly and disassembly, repeated use of the characteristics.
A. Formwork system : K board, Angle aluminum, wall board, beam bottom plate, beam side plate, roof, horizontal corner of starting board and stair step board, etc. Reinforcement system: tensile sheet, steel back, vertical back, through the wall screw, etc. B.Support system: DP support head, door support, inclined support, roof keel, roof support keel connector, etc. C.Auxiliary system: K board screw, mountain nut, drip line, pins, wire hole box, transfer hole, work stool, etc.
3, aluminum formwork process
Drawing deepening → pre-assembly → technical disclosure of site technology, construction staff and team → roll-coating demoulding agent → installation of formwork → reinforcement of formwork → acceptance → concrete pouring → demoulding and reverse for the next layer of construction
4, aluminum formwork and Plywood comparative advantages
A.Aluminum formwork is heavier than wood formwork, but flexible in disassembly and assembly.
B.High rigidity, long service life, large plate surface, less joints.
C.The concrete with high precision is smooth.
D.The construction depends on the mechanical degree is low, can reduce the labor and the material cost.
E.High construction efficiency, high recovery value.
Construction period is short: aluminum alloy building formwork system is a quick dismantling system, a set of formwork construction period can reach four days a layer, can shorten the construction period, save the management cost of the contractor. F.Convenient construction and high efficiency: Aluminum alloy building formwork system assembly is simple and convenient, the average weight of 21KG/㎡, can be completely assembled by manual, do not need any mechanical equipment assistance (workers usually only need a special hook and small hammer assembly, convenient and fast), Skilled installers can install 20 to 30 square meters per day (assembly workers need only simple training prior to construction).
G.Good stability and high bearing capacity: all parts of the aluminum alloy building formwork system are assembled from aluminum alloy plates. After the system is assembled, an overall framework is formed with good stability. The bearing capacity can reach 60 kN per square meter.
H.Convenient support system: the traditional construction methods of buildings, platforms and other formwork construction generally use intensive support, labor and material cost. Aluminum formwork is relatively less supported on site (the normal spacing of independent support is 1200mm, except in special cases).Large operating space, personnel passage, material handling smooth, easy site management.
I.The concrete surface effect is good after mold removal: aluminum alloy building formwork after mold removal, the concrete surface quality is smooth and clean, the flatness is 0-4mm, the verticality is 0-4mm, basically can meet the requirements of facing and fair-faced concrete, without plastering, can save material labor costs and time. Site construction without garbage: all parts of aluminum alloy building formwork system can be reused, after the construction of the demolition of the mold, the site without any garbage, the construction environment is safe, clean and tidy. The material is flame retardant, avoiding the fire danger.
J.formwork is dismantled molding effect: by aluminum mould we can refer to SSGF process will full cast-in-place wall, in order to prevent the leakage of external wall, the reduction of secondary structure can be the gate lintel, laying the camp, secondary structure and the structure of a junction set open close, drip line, the rail embedded, smoke duct the candy and a molding for subsequent construction and save time and cost. The external wall is connected by K plate, which perfectly handles the indirect stubble part of the external wall layer. The whole is flat and vertical, combined with the construction of external wall coating, which eliminates the secondary plastering and tiling, and has the
k.advantages of beautiful appearance and simple maintenance. .Aluminum formwork is widely used: aluminum alloy building formwork is suitable for shear walls, floor panels, columns, marks, stairs, floating windowsills, balconies. The sinking position can be used as a whole for one-time pouring concrete. It can also be used for concrete structure pouring of different floors of high-rise buildings, such as shrinkage wall, shrinkage beam and curved wall.
L.Many times of repeated use: aluminum formwork system is made of Chinese material (6061-T6) extruded profiles and welded into aluminum alloy formwork. A set of aluminum formwork specifications can be used for 200 to 300 times.
M.Standard versatility: aluminum alloy building formwork specifications diversified, according to the project using different specifications and shape and 殶 into aluminum formwork. When using the formwork after completing a project to rebuild a new building, only about 10 to 20% of the non-standard panels can be replaced, which can reduce the overall construction cost. After the scrap of aluminum alloy building formwork system, when the waste treatment residual value is high, the average cost advantage is obvious (the recovery price per square meter is about 180-220 CNY).
N.Improve quality: all cast-in-place external walls, prevent external wall leakage, cavity cracking and pipeline integration in one step, avoid later excavation and refinement of civil construction handoff work, improve the acceptance of fine decoration node.Reduce labor: reduce the requirements for woodworking, brickwork and other technical work while eliminating plastering to simplify the construction process.
O.Improve efficiency: wall intersecting construction, secondary structure, doors and Windows, railings, water supply and drainage, circuit lighting, interior decoration and other synchronous flow work, reduce the input of construction workers in the same period, delivery in advance, shorten the construction period.
P.Economic comparison between aluminum formwork and wood formwork: aluminum formwork (including support) and wood formwork (including support) can save about 20%-25% in 34 floors.
The appearance of the first three layers of aluminum formwork wall is not good. Because the aluminum formwork is a whole after assembly, it is not easy to breathe, and bubbles are easy to appear in the pouring process.
5. Comprehensive comparison between aluminum formwork and traditional wood formwork.
Aluminum formwork: aluminum formwork technology is the use of the overall extrusion molding of aluminum formwork profile processing. The advantages of the whole system is high standardization, light weight, strong bearing capacity, high precision, turnover, high bearing capacity, wide application range, convenient construction, reduce construction personnel, reduce labor intensity, improve the quality of construction. High recycling value, renewable utilization, can completely achieve zero construction waste discharge. Suitable for all fields of construction industry. The disadvantage is that the entire wall full cast-in-place, stiffness big, such as building in seismic zone without professional accounting, seismic waves will be easily damaged structure, the structure itself weight is bigger, probably in some cracks should be the construction in the secondary structure node, this needs us to calculate and reinforcement, aluminum formwork in the mold is better than traditional wooden formwork, some details of the site is not optimal, In the north of China, the construction cannot be carried out normally due to the temperature.
Wood formwork: A formwork made from wood, the most common being poplar and pine. It has the advantage of being relatively light. The price is relatively cheap, there is no module limitation when using, can be processed according to requirements, not affected by temperature. Disadvantages: the number of use is relatively small, there is a certain amount of damage in the process of processing, the destruction of resources, safe and civilized construction is not easy to control, safety is not as good as aluminum formwork, the quality of the project is low.
Post time: Jul-23-2021