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We open a plant for the production of cinder blocks

The production of cinder blocks is a profitable business that can bring significant profits. Equipment for the production of cinder block is quite affordable, technology and raw materials are available in each region, which provides a low threshold for entering this business.

The main advantage of cinder block, compared with other types of wall blocks used in construction, is its low price, which against the background of declining incomes of the population provides it with a significant competitive advantage.
Composition, types and brands of cinder block
Cinder block is a building stone, which is obtained by vibropressing or natural shrinkage in special forms. The main raw materials for the production of cinder blocks are slag, granite crushed stone, expanded clay and other fillers, for the connection of which cement is used among themselves. Cinder block is a universal material whose properties are largely determined by its main filler.

Using sand, pebbles or gravel, the most durable cinder blocks are made, but they also have maximum thermal conductivity.

The main types of cinder blocks include:

solid blocks with solid filler for laying socles and foundations;

solid blocks for masonry walls, which have less weight and strength;

cinder blocks for laying partitions, which have less weight than brick;

colored decorative cinder blocks, which are used for wall cladding, fences.

The main characteristic of the cinder block is its strength grade, which ranges from 35 to 125 kg / cm2. Cinder block is considered a low heat-conducting material. Its thermal conductivity depends on the filler and varies between 0.3 – 0.65 W / m * k. For comparison, ceramic brick has a thermal conductivity of 0.8 W / m * k, and silicate brick – about 0.9 W / m * k.

The standard life of the cinder block is approaching 100 years. It is very convenient for construction that the cinder block practically does not shrink, however it has a high level of water absorption, and therefore buildings from the cinder block must be finished with some kind of insulating material.

Slag stones are standardized according to GOST 6133-99 “Concrete wall stones. Technical conditions. ” The environmental friendliness of the cinder block is determined by its filler.

We open a plant for the production of cinder blocks
Scope of cinder block
The main area of ​​use of cinder block is the construction of buildings and structures. First of all, it is used for the construction of low-rise buildings, the construction of utility buildings, ventilation ducts and in landscape design.

The main competitor as a building material for cinder block is brick. Both the one and the other material have its pros and cons, in terms of using it for the construction of buildings. The main advantage of using cinder block is its lower cost per square meter of the construction being built, as well as the smaller amount of cement mixture needed for masonry.

Technology and equipment for the production of cinder block
The technology for the production of cinder block is quite simple. At the first stage, mixtures of cement, selected filler and water are made. Plasticizers are added to the prepared mixture, which increase the strength and waterproof properties of the product.

Also, special chemical additives are used to save cement, accelerate hardening processes, increase frost resistance (that is, increase the number of freeze / thaw cycles without damaging the unit), and provide hardening at low temperatures. These chemical additives can be divided into: plasticizing, air-entraining, hardening accelerators, anticorrosive and others.

For the preparation of cinder block with your own hands, without the use of equipment, you can use many recipes. We will not dwell on them in detail, since the production of cinder block by the manual method, without the use of equipment, is rather not a business, but a way to save money on our own construction. The simplest and most universal recipe is the following: 2 parts of sand, 2 parts of crushed stone, 7 parts of slag, 2 parts of Portland cement M400. Water is added in a ratio of about 0.5 parts plus the necessary plasticizers. However, each specialist in the production of cinder blocks has its own recipe for production.

Next, the prepared mixture is unloaded in the form of a vibrating press. The hardening of products occurs in vivo for up to three days. Special additives contribute to faster hardening.

The complete set of the basic technological line for the production of cinder block consists of a vibrating press, a concrete mixer, a flyover for a concrete mixer and a control panel. Additionally, the line can be equipped with various dispensers, which simplify the process of loading the mixture. This line can be equipped with various matrices, which allow to produce cinder blocks with different configuration of voids.

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