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Pre Foam Method of Foam Concrete Production

Here, the ready-mix truck brings the base material to the site. Through the other end of the truck, the pre-formed foam is injected into the truck while the mixer is rotating. So, small quantities of foam concrete can be produced for small works, like grouting or trench fill. This method would provide foam concrete with densities ranging from 300 to 1200 kg/m3. The foam input will be from 20 to 60 percent air. The final volume of the foam can be calculated by reducing the amount of other base material as this is carried out in the truck. Control of stable air and density is difficult for this method. So, a degree of under and over-yield must be specified and allowed. When the foam is formed, it is combined with a cement mortar mix having a water-cement ratio of 0.4 to 0.6. If the mortar is wet, the foam becomes unstable. If it is too dry, the pre-foam is difficult to blend. Foamed concrete composition varies with the density that is demanded. Generally, the foamed concrete with densities lesser than 600kg/m3 will have cement, foam, water, and some addition of fly ash or limestone dust. To achieve higher densities for foamed concrete, sand can be employed. The base mix is 1:1 to 1:3 for heavier foamed concrete and the filler to Portland cement ratio (CEM I). For more densities, say greater than 1500kg/m3, more filler, and medium sand are employed. To reduce the density, the filler amount should be reduced. It is recommended to eliminate the foam concrete with a density lesser than 600kg/m3. If you are looking for high quality, high purity, and cost-effective Cement foaming agent, or if you require the latest price of Cement foaming agent, please feel free to email contact mis-asia.

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