Преглед на пена бетон

CLC brick making process

In traditional foam concrete production, the cement foaming agent is dissolved. The foam generator is used to mix the foam produced by it into the slurry composed of cementitious materials and admixtures used in concrete. The foam concrete with micropores is obtained after mixing, casting, molding, и лекување.

Characteristics of foam concrete

Густината на пена бетон е околу 500-1200 kg/m3; топлинска спроводливост е генерално 0.12-0.30 W/(m·k).Јачината на притисок е генерално 3-14 MPa, а често се користи како изолационен слој за покриви, самоножни ѕидови, и топлински цевки. The current ultra-light foam concrete has a very low density and thermal conductivity, and its thermal performance is very excellent, such as a density of 80 kg/m3.The thermal conductivity of foamed concrete is 0.040 W/(m·k); the thermal conductivity of foamed concrete with a density of 100 kg/m3 is 0.043 W/(m·k); the thermal conductivity of foamed concrete with a thickness of 120 kg/m3 is It is 0.047 W/(m·k). Во моментов, in the world, if the material has a low thermal conductivity, it can be called an insulation material. The thermal conductivity of high-efficiency insulation materials must be lower than 0.05 W/(m·k). Ultra-light foam concrete has been used as a high-efficiency thermal insulation material, its performance is entirely comparable to organic thermal insulation materials such as polyurethane and polystyrene, and because of its high flame retardant coefficient, long service life.

Toxic gas has now become a popularized product of building insulation materials and has begun to gradually replace organic insulation materials on the market, becoming the new favorite of the building insulation industry.

Another definition of foam concrete is: користете цемент, примеси, итн. as the primary cementing material, add water and foam concrete admixture to prepare a slurry, and then foam through the cement foaming agent, cast, обликот, and cure to make A large number of small, independent, lightweight foam concrete with uniformly distributed bubbles.

Foam concrete specification

(1) Classification according to the difference in density

Thermal insulation foam concrete: foam concrete mainly used for thermal insulation. Вообичаено, it is foamed concrete with a bulk density of 400 kg/m3 or less. The ultra-light foam concrete made in recent years has the characteristics of efficient heat preservation.

Load-bearing foam concrete: Used as a load-bearing material, and also has a certain energy-saving and thermal insulation effect. Вообичаено, it is bulk density.

Foamed concrete above 700 g/m3.

Load-bearing and heat-preserving foam concrete: Used as a self-supporting foam concrete. Вообичаено, it is foamed concrete with a bulk density of 500-600 kg/m3.

(2) Classification according to different foaming methods

Физички цементно средство за пенење: Foaming agent for concrete: a foaming agent for concrete, which is based on surfactants, is foamed through a foam generator and mixed with a mixed slurry. The density of the foam concrete is adjusted by changing the number of bubbles. The foam concrete prepared by this method has good construction performance but is too dependent on the foaming machine.

Chemical foaming agent foam concrete: Use hydrogen peroxide or aluminum powder to release gas through a chemical reaction to make foam concrete. The temperature of the concrete and the consistency of the slurry will affect the foaming time and the foaming amount, which can be called post-foaming.

Concrete foamed after mixing: use surfactants, protein-based animal and plant foaming agents, итн. to be incorporated in the mixer,

Stirring with the slurry, this is a method of making bubbles by starting. Its mixing time, брзина на мешање, концентрација.

The change of the material particle size and other factors can adjust the air content, and the workability can be achieved only by stirring.

(3) According to different types of aggregates

Polystyrene particle foamed concrete uses polystyrene particles as aggregate, mix it with foam concrete slurry, mix and pour.

Foam concrete is made by injection.

Expanded perlite foamed concrete: foamed concrete made by using expanded perlite as aggregate. Покрај тоа, there are lightweight aggregate foam concrete prepared with polyurethane particles, phenolic resin particles, vitrified microbead particles, and vermiculite.

(4) According to the different classification of the production process

Factory prefabricated foam concrete: refers to the foam concrete prefabricated in specialized chemical factories, such as foam concrete insulation board,

CLC blocks and foam concrete wall panels, итн.

On-site pouring of foamed concrete: such as ground thermal insulation layer, floor heating thermal insulation layer, wall surface pouring and large-volume filling.

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