Construction with concrete blocks is spreading. This is due to the fact that manufacturers of these wall materials are opening production facilities in different regions. This makes the material available for a wide range of consumers. In addition, installation of concrete blocks is simple and fast.
The main advantages of the walls made of concrete blocks are lower thermal conductivity (compared to bricks), less weight, better soundproofing and most importantly – low cost of the material. The erection of structures made of concrete blocks takes much less time than the construction of brick buildings.
What are the types building blocks?
First of all, it is necessary to explain what types of blocks for house construction are available. Different types of building blocks have different advantages and disadvantages. Here are some types of concrete blocks, which can be purchased at an affordable price.
Cinder blocks have certain advantages and some disadvantages. The advantages of this material are low bulk density, low heat transfer coefficient, moisture resistance, good porosity and high strength. However, there are drawbacks – lower (compared to other cellular materials) insulation rate, the poorest geometry of the finished products among all lightweight concretes.
Cinder blocks are used to erect both external load-bearing walls and internal walls. Interior partitions can also be made of these blocks. Their structural strength allows to use standard floors of reinforced concrete slabs. Due to the fact that the weight of 1 cubic meter of finished cinder masonry is half that of one cubic meter of brick masonry, less strength of the foundation is required for a cinder block building.
Cinder blocks, once having reached full strength, poorly lend themselves to further machining. They can be drilled or cut only with special tools.
Different sizes of precast blocks require larger seam thickness in the masonry, which leads to the loss of some of the thermal insulation properties as a continuous seam of the cement-sand mixture is a so-called thermal bridge.
Foamed concrete is a material made of the mixture of cement with fine-grained fillers. Foaming is done using synthetic or protein-based foaming agents.
The formulas of foaming agents are protected by patents, so it is very hard to find out even approximate composition. It is only known that the protein-based foaming agents are made of slaughterhouse waste, and therefore they cost half as much as synthetic ones.
Foam concrete is produced as follows: the cement-sand mixture is mixed with water and a foaming agent. With the start of intensive foam formation, it is poured into a special mold, where it is cured until complete solidification. After that, the block is removed from the mold and cut into pieces of specified sizes using a special high precision equipment.