Mixtures, materials

Are dry mixes used?

The printer prints with standard sand concrete available for free sale in any construction market. Gypsum, mixtures with mineral additives and fiber can be used (they are also manufactured industrially, all the necessary documents are available). The operating instructions have technological regulations for the mixture, according to which it will not be difficult to prepare the necessary concrete for printing. Also, when buying equipment, we teach you how to prepare working mixtures.

Availability of certificates / test protocols for building mixes used for printing houses?

Printers print with standard compositions based on cement of the 400-500 series available for free sale almost everywhere. Accordingly, certificates should be asked from sellers (suppliers).

It is also possible to use mixtures with mineral additives and fiber (they are also mass-produced, all the necessary documents are available). The operating instructions have technological regulations for the mixture, according to which it will not be difficult to prepare the necessary concrete for printing.

There are test reports. They indicate that the characteristics of the mixtures in terms of strength, moisture resistance and frost resistance correspond to those declared by the manufacturers of the mixtures.

Do we need sand, crushed stone, and other materials to prepare concrete?

Cement, sand up to 2.5 mm. If you use crushed stone, it should be agglomerated. You can add polyester or glass fiber to increase compressive strength and ensure crack resistance, plasticizers.

How much does 1 m3 of the finished mixture with the necessary additives cost? I've looked at your website and you have supplements too.

The printer can print with standard sand concrete, freely available on any construction market.

In an economical version, the finished mixture is comparable in cost to conventional concrete.

Insulation requirements. Is it acceptable to use any materials, or do we need special ones? What is the application technology?

That's pure design decision. The printer lays concrete only, and then what to do with the structure should be decided by designers (to insulate, polish, paint, plaster).

Everything depends on the purpose of the building and the region of construction.

Is it possible to fill in polyurethane foam and fiberglass reinforcement inside?

The composition of the mixture can be any. The printer prints with any sand concrete, if you use a mixture of M300 accordingly, the characteristics will be declared.

Is it possible to print without additional reinforcement, for example, with fiber? What has already been used, for example, by a Danish company when printing a building in Copenhagen?

Our printers can print with standard M300 sand concrete. Most our buyers do just that.

You can add plasticizers, which are on sale in your region. The addition of polyester and glass fiber gives a slight increase in strength and provides crack resistance of long parts.

That's exactly what the Danes did, catching up with the compressive strength to 350 units.

Is it possible to use fine-grained expanded clay as inert?

You can use any non-metallic materials with a fraction of up to 2.5 mm.

What are the features of mixtures for this technology?

Our printers can print with ordinary sand concrete, which is available in every region.

What are the requirements for coating the finished product? Is it acceptable to use any materials, or do we need special ones?

Printers print non-removable formwork from any sand concrete, for example M300. You can add fiber and plasticizer.

The composition is regulated by the project. The purpose of the permanent formwork is to withstand the pouring of ready-mixed or structural concrete, foam concrete into the inner cavity of the wall. External coatings may be present this will increase moisture resistance and, accordingly, increase frost resistance.

What grade of concrete is the mortar obtained?

The characteristics of the mortar depend on the composition of the mixture. Accordingly, the finished M300 mixture will give the characteristics declared for this concrete. The operating instructions have technological regulations for the mixture, according to which it will not be difficult to prepare the necessary concrete for printing. When buying equipment, we teach you how to prepare the mixture yourself. Another option is to buy ready-made mixtures from our manufacturing partners. We recommend you to watch our video about mixtures https://youtu.be/0V3H1s1KNU4 

What is the composition of the printing solution?

The printer prints with standard M300 sand concrete, i.e. with materials that are freely available on any construction market.

If you use the M300 mixture, the characteristics will completely coincide with the declared ones.

The operating instructions have technological regulations for the mixture, according to which it will not be difficult to prepare the necessary concrete for printing. When buying equipment, we teach you how to prepare the mixture yourself. Another option is to buy ready-made mixtures from our manufacturing partners. We recommend viewing the article 3D mixtures and practical recommendations for printing.

What materials are used to insulate the cavities inside the frame of the house, so as not to cause the appearance of a dew point? Take into account the climatic conditions of Siberia up to -45 °C at 78% humidity.

Materials suitable for your conditions must be considered during design. Various materials can be poured into the cavity and laid before pouring. The dew point is calculated during the design.

Will plain concrete mortar be suitable for this printer?

Yes, the construction printer prints with standard cement-based compounds, i.e. those that can be bought in almost any construction store.

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