Ready-made and home-made forms for concrete from various

21-01-2018

Building

The manufacture of products based on building mixtures is difficult to imagine without configuration containers capable of giving the desired product the final product. Recently, plastic forms for concrete, which allow the most accurate transfer of surface texture, are popular. The main requirement for the raw materials used is resistance to aggressive media.

The photo shows the forms for concrete hemispheres.

Ready containers from polymeric materials

Modern products for decorative items are made most often from polymers, which are high-molecular compounds. Such molds for casting concrete are capable of rather high reversible deformations if relatively small loads are applied to them.

Flexible products

Due to the elasticity of the material, it is possible to create matrices of a complex configuration, which leads to an improvement in the aesthetic characteristics of the manufactured products. Finished elements are extracted from such containers without any extra effort.

The following are materials that allow for the necessary flexibility.

Rubber provides the ability to create casting molds for concrete intricate configurations. Products made of synthetic rubber are made using presses vulcanizers.
Silicone has several unique qualities that are not found in other substances. Manufacturers appreciate primarily the ability to retain properties at high humidity and rapidly changing temperatures.
Polyurethane is a hetero-chain polymer. The range of operating temperatures ranges from -60 to +80 degrees. Polyurethane forms for printed concrete are quite durable.

Silicone containers are shown to create concrete balusters.

Addition! Previously, formoplast was used for casting products, the price of which was low. However, in the conditions of the modern world, it is practically not used, since it is too soft.

Hard forms

Solid plastics are elastic materials having an amorphous structure. They tend to collapse with a slight elongation at break.

The modulus of elasticity of such polymers exceeds 1000 MPa, so the mechanical strength is quite high.

Polyvinyl chloride - transparent plastic, which has high chemical resistance. The working temperature range ranges from -15 to +65 degrees. The material is obtained by emulsion or suspension polymerization of vinyl chloride.
Polypropylene It is a thermoplastic polymer that begins to soften only at a temperature of 140 degrees. The products of this substance have a significant effect only strong oxidizers.
ABS plastic It is a thermoplastic resin resistant to mechanical shock. Operating temperature range can vary from -40 to +90 degrees.
Fiberglass It is a composite material, which by its strength characteristics is quite comparable with steel. At the same time, it has a low specific weight, which simplifies operation.

This is how rigid forms of plastic look.

Note! The most popular containers of polyvinyl chloride, which is primarily associated with the early appearance of the material. Gradually, the situation on the market is changing, because periodically new analogues are created.

Homemade fill accessories

If it is necessary to save money, then it is quite realistic to build containers for pouring mortar independently. You will have to choose the material to make and also prepare the right tools. The forms for concrete blocks must withstand the weight of the cast composition.

Metal construction

For self-construction of tanks will require a steel sheet whose thickness is 5 mm. The use of thin plates can lead to expansion of the side walls, then the elements will have a rounded configuration.

The following is information on how to make forms for aerated concrete.

Shows the intermediate stage of assembly.

A preliminary marking is applied on a metal sheet on a flat surface. You should get fragments corresponding to the sides of the proposed blocks.
Next is the cutting of the steel sheet using the grinder. The diameter of the disc should be 115-125 mm. In the process of cutting plates, it is recommended to use gloves and safety glasses.
At the last stage, the individual elements of the box are fastened to each other with a welding machine. After fixation inside the container there should not be any irregularities.

Attention! In the manufacture of a form for aerated concrete blocks, a solution is added containing, along with the main components, quicklime, caustic soda, sodium sulfate and a blowing agent.

Creating a tank of wood

For a device of this design will require edged boards and pieces of laminated plywood. The thickness of the main elements should not be less than 25 mm, otherwise the side walls will not support the weight of the finished mixture.

Below is considered making a mold for foam concrete with your own hands.

An example of wooden canisters for forming blocks.

The boards are being laid out in order to produce a pencil case whose cells had the same dimensions. During the work it is necessary to take into account the thickness of the laminated plywood.
Using a hacksaw to cut the elements. Plywood pieces are cut to the width of the board, and then glued with a special adhesive directly onto the base.
At the final stage is the assembly of elements. Fixation is carried out using screws or nails. The length of the fasteners should be 60 mm.

Note! It is quite difficult to make tongue-and-groove molds for foam concrete on your own, especially if wood is used as the base material. Therefore, it is better to make containers with the usual configuration.

Final part

Независимо от того, будет ли форма сделана самостоятельно или куплена в специализированном магазине, необходимо особое внимание все же уделять процессу замешивания раствора. В противном случае добиться приемлемого качества при производстве изделий не получится (см.также статью «Бетонные конструкции. Причины разрушения, технология ремонта – подготовка поверхности, приготовление смеси, укладка»).

Check out the video in this article for a clear explanation of the text.