Formwork for monolithic construction: construction and materials

Industrial monolithic shuttering:

design The principle of the device is the same as for amateur equipment, only special structural elements are used instead of random boards, pieces of plywood, chipboard and OSB, and columns and pegs are replaced with reliable stops and couplings. Professional formwork for monolithic construction is intended mainly for the construction of large industrial, commercial, less often residential buildings and structures, therefore, it must constructively provide a universal solution to a number of design solutions and have up to 100 operational cycles.

Accordingly, the complete set of monolithic formwork includes a whole set of elements:

• first of all, shields having the specified dimensions and made of materials calculated according to several parameters( about this below);
• compact fasteners for fixing shields when assembling formwork;
• fixing stops( external holder) and screeds( connecting the opposite panel members to each other);
• regular hardware and other additional components.

As you can see, the design is quite complicated, only professionals can work with it. Since formwork for monolithic construction belongs to the category of removable, it is used many times, it is necessary to be able not only to make the installation correctly, but also to properly dismantle it after the concrete has hardened. Conditionally offers of manufacturers for this position( designation) can be divided into three groups:

• construction of foundations;
• device of monolithic formwork of walls and other vertical structures( columns, pillars, supports);
• erection of horizontal formwork;
• arches, columns, staircases in the standard set are not included.

Materials and dimensions of the formwork for monolithic construction

There are several variants of the main shield element, each of which has the right to exist. However, the goal of industry leaders is the same: to ensure the reliability and durability of structural elements. Therefore, the material for the monolithic formwork of walls and ceilings should have the following characteristics:

• withstand high loads for a long time;
• prevent linear deformation and bending;
• have low moisture resistance;Usually such an effect on multilayer boards is achieved by applying a special composition( for example, melamine resins) to the inner surface;
• have a small specific weight: the simpler the part of the designer, the easier and faster it can be installed and dismantled.

As a material for the formwork of monolithic walls and columns, the most commonly used are plywood, steel, less expensive aluminum, plastic. The first option is the cheapest and most convenient to use. For example, WOODFORM panels are almost seven times lighter than steel counterparts and are twice cheaper, while they are made in the form of a glued and pressed three-layer plate made of fir and other coniferous wood. Note that the mechanical characteristics of such a monolithic formwork of walls and columns are quite high in N / kv.mm with appropriate thickness:

Mechanical characteristics	21 mm	27 mm	Min.value by ON B3023
Bending strength	40	35	20
Elasticity module	10000	10000	10000

All formwork manufacturers try to maximize the dimensional range of elements for their products in order to allow the installation of formwork for monolithic construction of any complexity. How these attempts succeed judge professional designers and builders, but again, for example, let us WOODFORM shields format intended for formwork walls device:

• standard: from 1000 to 3000h500 mm( dimension 2500 and 3000 available width 1000);
• in the enlarged ruler dimensions are 4000, 5000 and 6000 mm, respectively, with a width gradation from 500 to 2000 with a multiplicity of 500, i.e.a total of twenty standard sizes

A similar picture in the group "columns", so there is something to choose from. For the sake of justice, it should be noted that most of the leading manufacturers of formwork structures have a similar set of products.

Advantages of using solid formwork

Usually, when talking about preferences, it means comparing with analogues or devices close in their device. In our case, we can compare the parameters of panel, brick and monolithic structures. The economic side of the issue we will not consider( now such estimates are not entirely correct), let us dwell on the technogenic factors. What can be attributed to the advantages of monoliths.

1. Conditions of work of builders. It does not require huge areas for the placement of construction materials, a minimum of heavy lifting equipment, a five-spot development fits into the city line.
2. Lifetime. According to experts, the structure constructed with the use of cast-in-place formwork can stand up to 200 years. We will not dispute and confirm this fact, but if we compare the degree of corrosion of welded joints in a panel house with a sealed reinforcement in a monolith, then the victory is clearly on the side of the second option.
3. Permissible load. Overlapping such buildings, subject to building codes and regulations, can withstand loads up to 600 kg / m2, which is three times more than for panel structures.
4. Construction time. With the panel option with literate work organization almost full parity, brick builders - a handicap twice.

The WOODFORM formwork system is best suited for both professionals and those who for the first time faced the need for monolithic work. Thanks to its intuitive design, installation and dismantling will be as simple and convenient as possible.