Knowledge Of Aluminum Formwork Industry Must Read

Perhaps someone around you started talking about aluminum alloy formwork, saying that it has many advantages, and even saying that it can replace wood formwork, bamboo formwork, steel formwork, etc. In contrast, people understand the use and characteristics of aluminum alloy formwork There are few, here we have a better understanding of the new type of building formwork-aluminum alloy formwork by comparing the wooden formwork and the aluminum formwork. The reason why aluminum alloy formwork can get considerable application and development is mainly because it has many advantages compared with other building formwork.

1. The origin of Shaanxi aluminum template

Since the aluminum formwork was born in the United States in 1962, it has been used for 50 years. It has been widely used in the development of the United States, Canada, etc., as well as in the construction of emerging industries such as Mexico, Brazil, Malaysia, South Korea, and India. Aluminum formwork has been developed in China for only a few years, and it has been favored by many builders. For example, Vanke and China State Construction Group have used aluminum molds earlier in China, and aluminum mold application technology has become increasingly mature. my country's real estate development has transitioned from the golden age to the silver age. The major real estate developers are not only fighting for capital and time, but also for the application of new technologies. It is precisely because of the fast and efficient aluminum molds that major domestic developers are vying to promote the application of aluminum molds.

2. Brief introduction of aluminum alloy formwork system

The aluminum alloy formwork system is composed of four major systems: formwork system, reinforcement system, support system and accessory system. The standard plate system is made of aluminum alloy profiles, replacing the traditional wooden formwork, cooperating with high-strength steel support and fastening systems and hardware bolts and other accessories. It has light weight, high strength, overall stability, fast assembly and disassembly, and repeated use. Features.

Formwork system: K board, angle aluminum, wall body board, beam bottom board, beam side board, top board, starting board horizontal corner and stair treads, etc.;

Reinforcement system: pull tabs, profile steel backing, vertical backing, wall screw, etc.;

Support system: DP support head, door brace, diagonal brace, roof keel, top support keel connection end, etc.;

Auxiliary parts system: K plate screws, mountain nuts, drip lines, pins, pin pieces, line hole boxes, material transfer holes, work stools, etc.

Third, the process flow of aluminum mold

Drawing deepening → pre-assembly → technical presentation of on-site technology, construction workers and team → rolling release agent → installation of formwork → form reinforcement → acceptance → pouring of concrete → demoulding and reverse transportation for the next layer of construction

Fourth, the comparative advantages of aluminum alloy formwork and wood formwork

Aluminum alloy formwork is heavier than wood formwork, but it is flexible to disassemble and assemble.

High rigidity, long service life, large board surface and few seams.

High precision, the poured concrete is smooth and clean.

The construction has a low degree of dependence on machinery, which can reduce labor and material costs.

Features such as high construction efficiency and high recycling value.

Short construction period: The aluminum alloy building formwork system is a quick-release formwork system. The construction period of a set of formwork can reach four days for one floor, which can shorten the construction period and save the management cost of the construction unit.

Convenient construction and high efficiency: The aluminum alloy building formwork system is simple and convenient to assemble, with an average weight of 21KG/㎡. It can be assembled manually without the assistance of any mechanical equipment (workers usually only need a special hook and a small hammer for assembly. Convenient and fast), skilled installation workers can install 20-30 square meters per person per day (assembly workers only need to carry out simple training before construction).

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 frame is formed with very good stability; the bearing capacity can reach 60KN per square meter.

Convenient support system: In the traditional construction method, the formwork construction of buildings, platforms, etc., generally uses dense supports, which consumes labor and materials. However, the on-site support of the aluminum formwork support is relatively small (the normal distance between independent supports is 1200mm, except for special circumstances). Large operating space, unobstructed personnel and material handling, and easy on-site management.

The concrete surface effect is good after demoulding: after demolding the aluminum alloy building formwork, the concrete surface quality is smooth and clean, with a flatness of 0-4mm and a verticality of 0-4mm, which can basically meet the requirements of finishes and fair-faced concrete without plastering , Which can save material labor costs and time.

Shaanxi Aluminum Formwork

No rubbish in site construction: All parts of the aluminum alloy building formwork system can be reused. After the mold is demolished, there is no rubbish on site, and the construction environment is safe, clean and tidy. The material is flame-retardant, avoiding fire hazards.

Forming effect after the template is removed: Through the aluminum mold, we can use the SSGF process to cast the exterior wall in place to prevent leakage of the exterior wall. The openings, drip lines, pre-embedded cup openings of railings, and anti-sills of flue ducts are set at the junction of the primary structure to facilitate subsequent construction and save construction period and cost. The exterior walls are connected by K-boards, and the indirect stubble parts of the exterior wall layers are treated. The whole is flat and vertical, combined with exterior wall coating construction, eliminating the need for secondary plastering and tiling, and has the advantages of beautiful appearance and simple maintenance.

The application range of aluminum alloy formwork is wide: aluminum alloy building formwork is suitable for shear walls, floor panels, columns, signs, stairs, bay window sills, and balconies. Places such as sinking can be used as a whole by pouring concrete at one time. It can also be used for pouring concrete structures such as shrinking walls, shrinking beams and curved walls on different floors of high-rise buildings.

Many times of repeated use: The aluminum formwork system adopts the extruded material (6061-T6) to be welded into an aluminum alloy formwork. A set of aluminum formwork specifications and reasonable construction can be recycled up to 200-300 times.

Standard versatility: the specifications of aluminum alloy building templates are diversified, and they can be converted into aluminum templates according to different specifications and shapes of the project. When a new building is rebuilt using the template after a project is completed, only 10-20% of the non-standard boards need to be replaced, which can reduce the overall construction cost. After the aluminum alloy building formwork system is scrapped, when the residual value of the waste disposal is high, the cost-sharing advantage is obvious (the recycling price per square meter is about 180-220 yuan).

It overcomes the difficulty of assembly and disassembly of traditional templates, and does not rely on template technical workers with long-term experience. After one hour of simple training, ordinary employees can work independently and save labor costs for the enterprise; the operation is simple and fast.

It solves the phenomenon of poor quality of the main body of the construction project due to the poor rigidity and strength of the traditional formwork, and the waste of resources caused by the increase in the thickness of the decorative plaster layer caused by this phenomenon. Plaster-free solves hidden dangers such as hollow drum cracking.

Compared with the use of wooden formwork, it will not produce a large amount of construction waste during the construction. There will be no rubbish on site after demolding, no rust, no fire hazard, no nails on the installation site, no wood chips, wood chips and other residues from the chainsaw. Construction debris, the construction site is tidy.

After the aluminum mold was constructed, the plaster-free process was achieved: in the Hengyang Steaming Xiang Country Garden project, all the interior and exterior walls were plaster-free. The plaster-free interior and exterior walls not only shortened the construction period, and won the first opportunity to open the market, but also because there is no plastering. This process has greatly reduced the cost and made the aluminum mold more competitive.

Improve quality: All cast-in-place external walls prevent external wall leakage, hollow cracking and pipeline integration in one step, avoiding later excavation and refinement of civil construction transfer work, and fine decoration node acceptance.

Reduce labor: reduce the requirements for woodworking masons and other technical types of work while eliminating plastering and simplifying the construction process. :

Improve efficiency: wall interspersed construction, secondary structures, doors and windows, railings, water supply and drainage, circuit lighting, interior decoration, etc. are synchronized to streamline operations, reducing the input of construction workers at the same time, delivering ahead of schedule and shortening the construction period.

Green and environmentally friendly construction using aluminum molds: With the increasing environmental protection issues such as dust control, more and more projects are actively implementing on-site green construction "6..." requirements, and actively adopting on-site construction waste Aluminum alloy template with few and simple supporting system. All accessories of the aluminum formwork system can be reused. After the construction and demolding, there is no garbage on site. The support system is simple in structure, easy to dismantle, and convenient for efficient construction. All materials of the aluminum alloy building formwork system are renewable materials, which meet the requirements for energy saving, environmental protection, low carbon, and emission reduction in construction projects. Many developed countries have long stipulated that wooden formwork is not allowed to be used in construction projects, and renewable aluminum formwork is required.

Economic comparison between aluminum formwork and wood formwork: aluminum formwork (including support) and wood formwork (including support) can save about 20%-25% of the cost in 34 layers.