What is foam concrete?
Foam concrete, light-weight foamed light-weight soil, and cement foaming equipment are manufactured and produced, which have the effect of heat preservation. Foamed concrete is a lightweight, heat-insulating, heat-insulating, fire-resistant, sound-insulating and frost-resistant concrete material. The slurry can be self-leveling and self-compacting. It has good workability and is easy to pump and level. It is almost the same as all other building materials. It has good compatibility and the strength can be adjusted.
The pumping system of the foaming machine is used for cast-in-place construction or mold forming, and a new type of lightweight thermal insulation material with a large number of closed pores is formed by natural curing.
Experiments have proved that the thermal conductivity of the enclosed gas is extremely low when it is not flowing. The high-quality foamed concrete has up to 50%~80% of the pores. The pores are circular and closed to each other. The air in the pores does not produce convection exchange. The temperature is greatly weakened layer by layer during the foam transmission to achieve the effect of heat insulation, heat insulation, heat preservation and sound insulation. , The closure and quantification of the foam determine the thermal insulation performance. Therefore, the foam pores of foam concrete used for floor heating must be closed. The higher the sealing rate, the better the thermal insulation performance.
Strength requirements of floor heating foam concrete
The strength of foam concrete plays an important role in floor heating technology. In addition to good thermal insulation properties, foam concrete must also have compressive strength, which should be above 7MPa.
Note: Ordinary concrete is 2500kg per cubic meter, allowing air content of 1%~5%, and compressive strength of 25MPa~80MPa.
40%~80% air is introduced into the foamed concrete, 200~1200kg per cubic meter, and the number of foam is as high as one billion. It is like a stacked eggshell, the flexural strength will inevitably be greatly reduced, and its compressive strength is as low as 0.4 MPa. The physical properties of load-bearing, pressure-bearing, seismic, flexural and bonding are extremely weak, but it has excellent heat insulation, heat preservation and sound insulation properties.
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