Specialized aluminum gas formers (CGO) - aluminum gas formers, designed specifically for the production of aerated concrete . They are characterized by reduced dusting and hydrophilicity .
There are CFS produced by the dry method and water based CFS.
The use of PAP (aluminum pigment powders) as gas-forming agents in the production of aerated concrete has more than a century of history. However, by the mid-20th century, European manufacturers of aluminum powder and powders began to produce blowing agents, which had several advantages. At the same time, PAPs in the modern market are losing their positions. The characteristics of the ccf system offered on the market fully comply with the requirements of aerated concrete manufacturers. Other PAP consumers (production of paints and varnishes, metallurgy, refractory materials) began to use specialized materials even earlier.
The passport characteristics of the gas generators should contain distinctive parameters. First of all, specialized gas formers are divided according to the degree of coherence into pastes (large granules with a high degree of coherence, practically dusting) and powders (medium and small granules with weak cohesion, with residual dusting of different degrees). The term “paste” does not correspond to the consistency of the product, but indicates a high cohesion within each individual granule. The term “powder” is historically justified, but also inaccurate, therefore it is proposed to introduce a more accurate definition - gas formers with an unrelated structure. For any of these products, the kinetics of gas evolution (2–8–16–30 min), the content of active Al (%), the particle size distribution (Dav) and wettability must be determined. In addition to this, in the instructions for use it is necessary to indicate the degree of dusting, the time during which the HE reduces activity by 10%, the survivability of the active suspension under given conditions.
Since 2000, the main group of developers and suppliers of sGO has formed in Russia: Eckart (Germany), Schlenk (Germany), Benda-Lutz (Austria) and NSC-TEC (Russia).