Lette betongtilsetningsstoffer | Høyytelses skummende midler for cellebetong
Skummiddel for skumbetong har en ekstremt kritisk innvirkning på kvaliteten på skumbetong. Skummiddel av høy kvalitet kan lage skumbetong av høy kvalitet. Ytelsen til Skummiddel for skumbetong er ikke bare relatert til stabiliseringstiden og jevnheten til skummet, men også til størrelsen på boblen og blødningshastigheten.
The foam diameter of Skummiddel for Foam Concrete is not as big as possible, it should be about 1mm
The pores have the same requirements for the pore diameter, and the same should be the same for the bubble diameter. Many producers ask the foam pore size to be as small as 0.1mm. Faktisk, it is because if the physical foaming has a large foam diameter, the stability of the foam is poor and foamed concrete cannot be made. De samme råvarene og formelen, samme utstyr og teknologi, just change the bubble diameter, the compressive strength of foam concrete with 1mm bubble diameter is at least 20% higher than that of foam concrete with 0.1mm bubble diameter. Derfor, it is wrong to pursue a large bubble diameter of 0.1mm or more. It is a misunderstanding in the production of foam concrete and should be corrected.
Foaming Agent for Foam Concrete's foam bleeding rate is as low as possible, unngå å bruke melkeskum
According to the size of water content, foam is divided into milky foam with more water and less foam and sponge foam with more and less water. Blant dem, milky foam is unqualified and inferior foam and cannot be used.
After the foam of the Foaming Agent for Foam Concrete is produced, it gradually oozes water. The bleeding consists of two parts:
(1) Blødning av skumvæskefilm. This part of water is secreted from the liquid film, which is the water secreted by the liquid film under the combined action of gravity drainage, overflatespenningsdrenering, and liquid film destruction drainage. Jo tykkere væskefilm av skummet, the greater the bleeding; the faster and more the foam bursts, the greater the bleeding.
(2) Water between bubbles. This part is water with no bubble liquid film formed. The worse the foaming performance of Foaming Agent for Foam Concrete and the foaming machine, the more water between the bubbles that cannot form a foam liquid film. They are actually water that can't become bubbles.
When the bleeding rate of the foam is high, den vil være tynn som flytende juice, turbulent flow, can not pile up, the amount of water in the foam is very large. Når denne typen skum tilsettes til sementoppslemmingen, sementslammet blir veldig tynt, but the foam is very small, the volume of the slurry is small, and the foamed concrete produced has a high density, som ikke oppfyller de tekniske kravene.
Derfor, melkeskum kan ikke brukes. The appearance of the foam that meets the technical requirements should be spongy, fine and small bubbles, hopet seg opp som hvite skyer, like bounced cotton, og vil ikke flyte tilfeldig. The water content of this foam is very small. This shows that its foam liquid film has little bleeding, the foam is not easy to burst, det er lite vann mellom boblene, and the amount of bubbles is large, and most of the volume is air bubbles. What needs to be emphasized here is that the sponge foam must be small bubbles with a bubble diameter of less than 1mm, not large bubbles of a few millimeters or even tens of millimeters. Large bubbles are easy to pile up, and they look like white clouds, men fordi boblediameteren er for stor, den er også ukvalifisert.
The low bleeding of foam is required to ensure the number of bubbles in the foam and the porosity of the foam concrete, which is to ensure the density of the foam concrete.
The foam of Foaming Agent for Foam Concrete has no side effects on cementitious materials
Cementitious material is the main source of the strength of foam concrete. The addition of Foaming Agent for Foam Concrete cannot affect its gelation, det vil si, it does not produce negative gelation effects. This cannot be achieved by all kinds of bubbles.
I langtidstester, we have found that many foams hinder the gelation of cement, magnesite and gypsum, som kan redusere styrken til skumbetong, and sometimes even the hardened concrete basically loses its strength. The stability of these foams is very good. It lasts for a few hours. It looks like a sponge, has low bleeding, and has a uniform density. It meets the technical requirements in all aspects, men det er ikke kompatibelt med geleringsmaterialet, so it cannot be used in production. . This shows that foams that are qualified in other aspects, such as the impact strength, are ultimately not technical requirements.
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