Suppliers of aluminum formwork systems

When the concrete is placed, it is in a plastic state. It requires being supported by temporary supports and molded parts of the desired shape until it is strong enough to support its own weight. This temporary cover is known as formwork or forms or formwork. The term molds is sometimes used to indicate the formwork of relatively small units, such as lintels, cornices, etc.

Definition of formwork: -

"The forms or the molds or shutters are the receptacles in which the concrete is placed, so that it will have the desired shape or contour when it hardens.After the concrete develops the adequate strength to support its own weight, it can backing out"... (ACC).

"Formwork is the term given to temporary or permanent molds into which concrete or similar materials are poured."... (Wikipedia Encyclopedia).

Requirements for a good formwork.

The essential requirements for formwork or formwork are:

a) It must be strong enough to take the dead and living loads during construction.

b) The joints in the formwork must be rigid, so that the protrusions, twists or falls due to the dead and living load are as small as possible. Excessive deformation can deface the surface of the concrete.

c) The construction lines in the formwork must be true and the plane of the surface, so that the cost of finishing the concrete surface when removing the formwork is the least.

d) The formwork must be easily removable without damaging itself so that it can be used repeatedly.

Classification of formworks

The formwork can be classified according to a variety of categories, related to differences in size, location of use, construction materials, the nature of the operation or simply the brand of the products. However, the enormous amount of tropical wood that is consumed each year for the formwork has resulted in criticism from environmentalists, as well as in the continuous escalation of wood prices. As a result, there has been a strong tendency to use other materials or formwork systems to replace wood. The different categories in which the forms can be classified are:

a) According to size.

b) According to the place of use.

c) According to construction materials.

d) According to the nature of the operation.

e) According to the brand of the product.

Classification according to size.

The classification according to the size of the formwork can be very simple. In practice, there are only two sizes for formwork; Small size and big size. Any size designed to be manually operated by workers is small in size. Very often, the assembly process is preferably handled by a single worker, and work on the site is done independently to avoid possible waiting times. Therefore, for reasons of size and weight, the materials and the construction of small formworks are, therefore, limited. At present, the most common systems are made of wood and aluminum, and generally have the form of small panels. Rarely are medium-sized formwork. In cases where large formwork is used, the size of the form can be designed as large as possible to reduce the number of joints and to minimize the amount of lifting. The rigidity required by large formworks can be addressed with the introduction of more rigid components, such as bolts and welded. The increase in the weight of the formwork panels is insignificant, since in most cases a crane will be used.

Classification according to the location of use: -

There are not many effective formwork systems for stairs and stairs. The complicated three-dimensional nature of an element that involves suspended panels and vertical boards, as well as the need to deal with very different spatial and dimensional variations as required by individual design situations, can not be achieved by a universally adaptable formwork system

Classification according to construction materials.

The materials used for the formwork are traditionally quite limited because they find the difficult balance between cost and performance. Wood in general remains the most popular formwork material for its relatively low initial cost and adaptability Steel, in the form of hot-rolled or cold-formed sections and in combination with other coating materials, is another popular choice for materials of formwork. In the last two or three years, aluminum formwork systems have been used in some cases, but many users continue to question performance, especially with regard to cost control and labor.

Aluminum formwork

The aluminum formwork panels are made of high strength aluminum alloy, with the face or contact surface of the panel, consisting of a 4 mm thick plate, which is welded to a formwork of specially designed extruded sections, to form a robust component. The panels are held in place by a simple system of arrangement of pins and wedges that passes through the holes in the outer rib of each panel. The panel adjusts precisely, safely and does not require clamps. The walls are held together with high-strength wall ties, while the roofs are supported by beams and supports.

Since the equipment is made of aluminum, it has sections that are large enough to be effective, but light enough to be handled by a single worker. Individual workers can handle all the elements necessary to form the system without the need for weight lifting equipment or skilled labor. By guaranteeing the repetition of work tasks on a daily basis, it is possible that the system takes the techniques of the assembly line to the construction site and guarantees quality work by unskilled or semi-skilled workers.

The test assembly of the formwork is carried out under factory conditions, which guarantees that all the components are manufactured correctly and that no component is lost. In addition, they are numbered and packaged in such a way that they allow easy installation and dismantling of the site.