Cellular concrete production

Грађевински материјал за обраду

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1 Година (е)

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Опис услуга

Cellular concrete is made in result of solidification preliminarily blown-out mixture of the cementing medium, water, silicious component using gasifier of components. Most frequently as foaming agent used aluminum powder. The aluminum powder reacts with water solution of calcium hydroxide and disengages hydrogen. In fact, the quality of cellular concrete is high when the size of pores decreasing and homogeneity of porosity is rising. In order to ensure best quality of cellular concrete is necessary to distribute aluminum powder in its weight and increase the degree of dispersion. Besides, the one of technological factors which determines the cellular concrete structure is content of active CaO in mixture. As usual the preparation of gasifier reduces to partial paraffin film stripping from aluminum particle surface by mixing of this film with water and surfactant species, after these action need to introduce suspension into solution. Because of low efficiency of mixing devices, paraffin film practically not removed. In addition, there is a coagulation of aluminum particles, which leads to the local concentration of gas in the products, the appearance of voids and cracks. Because of shortage of gas emission in the case of gas silicate production is necessary to introduce up to 25% of lime into the mixture. The necessity of additional introduction of a lime into the mixture is specified by requirement to obtain the durability of concrete which allows to keeps it in vesicular condition by the end of gas emission using the hydration cementation. Application of ABC-100 unit for preparation of aluminum powder suspension in production of the gas silicate allows avoiding the coagulation of aluminum particles, raises their activity, gas yield and homogeneity of the mixture. At the table 2 you can see some of the comparative data of physicochemical properties of the gas silicate which was made by using the aluminum suspension fabricated by different methods. The table shows that usage of treated aluminum suspension by ABC-100 allows to obtaining the gas silicate which has the durability up to 10-30% and quality index up to 20-60% higher in comparison with the control sample (table 2, experiment 1). Application of ABC gives a possibility decrease by 10 % gasifier consumption and by 2% lime consumption. At the same time there is no weighting of gasifier. On the contrary, the volume weight of the gas silicate is reduced but its durability is increased. Obviously, the quality of the blown-out concrete can be increased by the treating process by ABC-100 unit in the vortex field of sand-lime mixture or in the sand-cement mixture on purpose of activation of SiO2 like we do the same in expanded-clay aggregate production. More details you can find on our website www.fuelcleaning.globecore.com