Advancing the application of aluminum templates is promising

Building formwork is an important tool in the construction of concrete structures. In developed countries, due to their high technological innovation requirements for building formwork, the used templates are all of high quality and durable materials. Industrial die casting lines are used to produce high-precision die sets; the formwork and its support system Is the use of electronic; template installation is the implementation of professional construction, by the professional construction team or by the template manufacturer design and manufacture and installation; standardized system is relatively sound, unified and detailed product, design and construction technology standards, Easy to achieve modularity. Therefore, the templates of developed countries like Europe and the United States not only ensure the quality of concrete works, but also have high construction speed, high number of template turnovers, and low material consumption, and they have very good economic benefits of comprehensive technologies.

Since the reform and opening up, China has promoted and applied many new types of templates and its supporting technologies through the introduction of foreign and self-developed technologies, and developed the clear-water concrete formwork technology. In terms of production technology, China has developed and applied a combination of steel template, large formwork, cast aluminum formwork, plastic formwork and other tool-style templates and fastener-type steel pipe frames. However, the structural design is too complex and other reasons, resulting in a new type of assembly, tooling template system is difficult to popularize, can not form a more unified and improved assembly of the leading template system, template construction professional team is also less.

In the 21st century, the gradual application of aluminum templates has broken this pattern, and development in some places has become more mature. The reason why China is more and more inclined to use aluminum templates is that the aluminum template technology is in line with the current policy of implementing green construction in China. The advantages of aluminum templates compared with traditional templates are mainly manifested in the following aspects.

The first is light weight and high rigidity. The experimental test data proves that the bending strength of aluminum alloy is three times that of ordinary steel. The weight of the aluminum formwork for construction is 24kg ± 5% per square meter. It is the lightest among the existing metal construction forms, and no mechanical equipment such as hoisting is needed during construction.

The second is that all kinds of specifications and models are complete and with high precision. The construction drawing is designed and formed once. The structure and construction are tight, the error is small and the precision is high. It is very suitable for the standard high-rise buildings, high-rise buildings and multiple-family buildings.

The third is to assemble, split, easy to learn. Overcoming the difficulties of installing and disassembling the traditional template, it does not rely on long-term experience of the template technology workers. After an hour of simple training, the ordinary employees can perform independent operations and save the labor cost for the enterprise.

Fourth, there are many cycles and low sharing costs. All parts of the aluminum formwork system can be reused. Under normal use and standard construction conditions, the aluminum template can be recycled more than 300 times, and the average cost of use of the aluminum profile can be relatively low. While the wood formwork has only a few turnovers, the steel formwork has only a few dozen turnover possibilities.

Fifth, a wide range of applications and strong carrying capacity. Precisely designed stencil system made of aluminum, suitable for all building components such as load-bearing walls, columns, beams, floors, stairs, balconies, etc., can be finished using cement casting. Such a building can be quality assured and accurate The dimensional tolerances, aluminum formwork allows uniform load and can withstand the side pressure of the concrete up to the standard of the steel formwork. Bearing load 60KN/? per square meter will not be destroyed.

Sixth, the construction effect is of good quality and free from abuse. The use of aluminum template pouring concrete, can achieve the technical requirements of finishes and clean water, concrete surface smoothness and finish is simply unmatched by other types of templates, can reduce the lottery or even without approval, after the ceiling can be renovated, and even Can be built above, the following decoration, it not only saves money, but also to speed up the construction schedule and shorten the overall construction period.

Seventh, construction efficiency is high and construction period is short. Aluminum alloy construction template is a quick release mold system. According to different climatic conditions, generally 18 to 36 hours can be demoulded, so only one layer of aluminum template plus three layers of single support can be used to meet the requirements, which can maximize the improvement of engineering assembly. The construction speed can be dismantled, and the normal construction can be up to 4 days. This greatly shortens the construction period, saves management costs for the contractor, and shortens the development cycle for real estate developers.

Eighth, the recovery rate is high and the residual value is large. Aluminum template recovery rate of 400 yuan / square meter, high residual value, and its recovery value is several times the number of steel templates.

Ninth is a unique support system, with convenient materials and walking on the construction site. The bottom support system of the formwork adopts “single tube vertical independent” support with an average distance of 1.2 meters. It does not require cross pull or diagonally assisted support. The construction personnel can move materials and walk freely on the construction site, and the single support can be easily and conveniently removed.

Tenth, the construction is safer and does not generate construction waste. There is no iron nail on the installation site of aluminum formwork, and there are no sawdust wood chips and other construction debris. The construction site is safe, clean and tidy. It will not generate a large amount of construction waste like the wood formwork, and it will reach green completely. Construction standards.

It should be pointed out that there are still many issues and difficulties that cannot be avoided in the process of the promotion and application of aluminum stencils, such as the concept of people's use of the concept, the acceptance of market subjects, the relatively high one-time investment, and the distribution of aluminum stencils. Unreasonable, uneven problems and so on.

Therefore, in order to promote the application of aluminum substitute steel and aluminum substitute wood at the construction site, it is necessary to do in-depth and meticulous work on top-level promotion, intensification of propaganda, conversion of concepts, and development of the situation. The use of aluminum formwork will be an innovation in construction technology and a major advancement in green construction.