Construction of houses

Construction of houses of concrete blocks – the modern trend in residential construction.

Quickly and inexpensively build a quality comfortable home – today it is quite possible. Forget bricks and blocks of non-autoclaved aerated concrete (for simplicity further we shall call these blocks – outdated material). This construction materials yesterday. Monolitdomstroy company offers services for the construction of houses on the most modern and efficient technologies – from autoclaved aerated concrete blocks (aerated concrete).

Construction of houses of concrete blocks (AAC) – this is a real trend today. Durable, lightweight and beautiful material gazoblok quickly and affordably build a “turnkey” holiday home or vacation cottage at any level of complexity with the highest level of comfort. According to experts, the share of solid cottages and houses built of concrete blocks (gazoblokov) on the market suburban housing construction increased by 10-15% per year.

1. Manufacturing technology of aerated

Aerated concrete – a kind of foam. To get to the aerated mixture of quartz sand, cement, water and lime, add a small amount of aluminum powder.

As blowing agent used aluminum powder. As a result of chemical processes aluminum powder into a gas and gas-concrete materials gives them unique properties. Foaming and solidification processes occur in the autoclave oven under high temperatures and high pressures. The resulting hydrogen is replaced with atmospheric air, the volume of the crude mixture is increased by five times. The hardened mass is cut, and come ready to manufacture aerated concrete blocks (gazobloki), the price that compares favorably with the prices of bricks.

2. The main difference between the autoclave aerated concrete blocks from the traditional (outdated) foam blocks (foam blocks)

As mentioned above, aerated concrete – a kind of foam, but with three significant differences:

1. In the production of foam concrete (aerated concrete blocks) using a blowing agent (chemical reagent), and the production of aerated concrete – CGS (aluminum powder). It is through the pores of concrete blocks gassing have an open structure, in contrast to the foam blocks the pores which have a closed pore structure. This difference gives the unique advantage of foam (foam blocks) to the gas concretes, namely, foam concrete blocks (concrete blocks) is less absorbent. Due to this traditional foam concrete block for a long time does not sink in water – the main producers of a publicity stunt and adherents foam. The house, built of aerated concrete blocks (foam blocks) can not plaster for 2-3 years. For all other key parameters such as strength, thermal conductivity, etc. zvukopronitsaemot, open pore structure of aerated concrete is much greater than the closed pore structure of aerated concrete (aerated concrete blocks). Approval of the ability of the material to “breathe” refers specifically to concrete blocks. And in this property, they, unlike the foam blocks (foam blocks), brick and cast-houses really are not inferior and have much in common with wooden houses (log, lumber).

2. In the production of aerated concrete blocks (foam blocks) finished mixture is poured into molds and acquires firmness in vivo. Foam concrete blocks (concrete blocks) can be done in any garage. Solidification of the mixture occurs in uncontrolled mode, which leads to a rather large spread and volatility properties of porous concrete blocks (foam blocks). In addition, market the products of a large number of artisanal producers of aerated concrete blocks (foam blocks), often with very low quality. In the production of concrete blocks (gazoblokov) manage the process of hardening, which gives the block high uniformity and quality. Manufacturers of concrete blocks – a large company with a guaranteed high quality concrete blocks (gazoblokov).

3. In the production of aerated concrete blocks (foam blocks), the mass is poured into a mold and solidifies, and the production of concrete blocks hardened cellular concrete blocks are ready to cut. This leads to the fact that the geometric dimensions of concrete blocks (gazoblokov) is significantly more accurate than the blocks of foam (foam blocks).

3. Classification of concrete blocks

Depending on the application of three types of concrete blocks (blocks of cellular concrete):
• thermal insulation (density 200-500 kg/m3), is used only as a heater in self-supporting structures
• structural and thermal insulation (density 500-900 kg/m3)
• constructive (density 900-1200 kg/m3).

In modern low-rise building primarily used structurally insulated aerated concrete blocks. The most commonly used units with a density of 400-500 kg/m3.

4. Properties of aerated concrete (AAC):

• Ease of concrete blocks. Standard gas-concrete blocks of aerated concrete, brand D500, size 300h250h600 mm weighs 30 kg and can replace 22 bricks, which weigh 100 kg (calculated on the same volume). Ease of concrete blocks can reduce freight and installation costs, the cost of installation of foundations, reduce the volume of work.

• Thermal concrete blocks. Due to the porous structure of aerated concrete is a good thermal insulator. Coefficient of thermal conductivity of aerated concrete in the dry state – 0.12 W / m ° C. Enclosed in the pores of concrete blocks air leads to excellent heat insulating effect. In the operation of the building of cellular concrete and concrete blocks home heating costs are reduced by 25-30%. The thermal conductivity of aerated concrete blocks 400 mm thick and a density of 500 kg/m3 equivalent masonry 750 mm.

• High water vapor permeability of aerated concrete blocks – the ability to “breathe”, letting out steam and noxious compounds, and the inside – fresh, oxygen-rich air. For this indicator, with houses built of concrete blocks can be compared only wooden houses. Intense steam and gas exchange does not develop fungus and mold, and, most importantly, creates a comfortable atmosphere in a residential area.

• Sound insulation properties of aerated concrete, due to its porous cell structure is 10 times higher than that of the brickwork. The wall, built of concrete blocks 400 mm thick, provides sound insulation in the 45-50 dB.

• Fire concrete blocks. As for the production of aerated concrete aerated taken only natural minerals, there is no fire hazard. Concrete, while the inorganic and non-combustible material, can withstand a one-way fire for 3-7 hours. Houses built of concrete blocks, have the highest rate of fire safety.

• Frost concrete blocks. Aerated concrete frost, due to the presence of back then, which pushed the freezing ice and water. The material itself is not destroyed. It is believed that when the frost resistance of the material of construction technology at least 25 cycles.

• Strength of concrete blocks. At a density of 500 kg/m3 aerated concrete has high compressive strength – 28-40 kgs/sm3, concrete strength class B22, 5 achieved by autoclaving. Blocks of this material may be used for masonry bearing walls!

• Structural concrete blocks. Due to the relatively large size aerated concrete block and its light weight (does not require special lifting equipment) greatly increases the speed of construction and, accordingly, reduced labor costs. In addition, the exact geometrical product specifications (deviation less than 1 mm.) Enable mason blocks using adhesive, which provides adhesion and excludes the presence of a clutch of “cold bridges”.

• Easy to handle AAC. Aerated concrete block is easily processed by any cutting tool, sawn, drilled, nailed, planed, shtrabitsya – this makes its use particularly attractive. Easy to handle AAC enables you to create interesting architectural solutions, saving time and money during installation of internal communications, including quick and easy to cut channels and holes for wiring, piping, perform an arched configuration.

• Environmentally friendly AAC. Modern aerated concrete is made from sand, lime, cement and aluminum powder. It does not emit toxic substances and their ecology is not inferior to the tree. But it is concrete, unlike wood, does not decay and aging. Ecological purity of raw materials used ensures complete safety for human aerated products. Background radiation does not exceed the AAC 11.9 mc / h. It is a porous material, so a house built of aerated concrete to breathe as easily as the wooden.