Use of plastic plywood in monolithic construction

At the initial stage in monolithic construction, it is necessary to pour a concrete base. To do this, you need to make a frame consisting of strong and even shields. At the same time, after pouring and solidifying the concrete mortar, such a structure is disassembled and reused for subsequent buildings. Thus, the main parameter of the sheet material is the number of cycles of its use, the so-called "turnover".

This parameter directly depends on the type of sheet material. Today, both board structures and sheet plywood of various types are used for formwork. And if the first ones are impractical to use, then plywood for formwork gives a lot of advantages.

Formwork structures made of plywood sheets require less time for installation, it does not need additional alignment, there are no scars and additional joints on it. Plywood for formwork does not deform under the weight of the concrete mass, and less additional supports are needed during installation. Plywood also benefits from increased moisture resistance and resistance to certain chemical elements.

 

 

Let's now consider the main types of plywood for formwork, which have gained popularity in our time. The most popular is laminated plywood, which has been specially developed for use in formwork systems. It is distinguished by a special outer layer, which is a film to protect against aggressive external environment. It is used in both low-rise and multi-storey monolithic construction. It has its own classification, depending on the wood used. The number of repeated cycles of using such plywood varies from 10 to 30, this is under ideal operating and storage conditions, which is rarely observed on construction sites. Therefore, the real "turnover" of plywood decreases significantly.  During operation, the laminated plywood layer is damaged, the edges are chipped, moisture gets into the shield, all this leads to deformation and unsuitability of the sheet for formwork.

It is also worth noting the convenience of using plywood sheets during installation and decking. For example, a sheet of high-quality laminated plywood 1250 mm x 2500 mm x 18 mm weighs from 35 kg. This leads to the use of special equipment for the delivery of shields in multi-storey construction.

Having studied all the advantages and disadvantages of laminated plywood, the production of polymer formwork panels began. In practical use, they turned out to be better than wood-based sheet materials and solved possible problems that we might encounter during use. Plastic plywood does not adhere to concrete mortars, excluding the use of lubricant for formwork.

For example, Plastiwood plastic plywood has received the same strength characteristics, withstands high loads, while being devoid of the disadvantages of laminated plywood. It is waterproof, resistant to chemicals, does not deform from scratches and has a non-slip smooth surface. It does not require the use of lubricant for the formwork, and it can be mounted with nails or screws.  The weight of a sheet of plastic plywood measuring 1250 mm x 2500 mm x 18 mm is only 17 kg, which simplifies the installation, disassembly and delivery of formwork systems.

 

Another striking example is the Wonderwood plastic board, whose sheet sizes are 250 mm x 2000 mm x 18 mm, so it is convenient to use it to create non-standard forms of formwork, for the construction of columns and other structures in monolithic construction.

Polymer sheet materials do not require special storage conditions, if necessary, they can be easily cut with a hand or circular saw. When building a formwork made of plastic plywood, the same mounting options are used, such as a set of coupling screws and nuts for formwork, or the use of a chiroz rebar spring clamp complete with a key. At the same time, the material does not create residues, as it is completely recyclable and has a high price for disposal. And most importantly, the ability to use the shields more than 50 times even in the most difficult operating conditions.

The cost of plastic plywood is comparable to laminated counterparts. The use of plastic plywood in monolithic construction makes it possible to significantly reduce the cost and facilitate the process of constructing objects of any complexity.