The Method of Determining the Composition of the Concrete Mixture to the Required Density of Non-Autoclaved Aerated Concrete on Micro Filler of Dispersed Granite Dropout

ABSTRACT

The article presents the results of research in the form of methods for determining the composition of aerated concrete mixture (according to the required design density) of aerated concrete of non-autoclaved hardening on cement binder and micro-filler from dispersed granite screenings. The information about the components of the designed aerated concrete mixture, including a binder, micro-filler, gas-forming additives and surfactants. The developed method takes into account such factors as: the projected density of aerated concrete, the parameters of the mold for pouring the mixture, the ratio of the required amount of micro-filler and cement, the ratio of water consumption and the total content of solid components of the mixture, the activity of gas-forming components, the loss coefficient of the mixture, the mass fraction of CaO in the cement. The technique allows not only with a high degree of accuracy to determine the cost of all necessary components for the preparation of aerated concrete mixture, but also makes it possible to assess the impact of other related and important factors of the technological process of preparation of aerated concrete, in particular, the mass of the concrete mixture and the volume of the concrete mixture before gas formation. The formula for calculating the volume of forms with an arbitrary configuration, given in the technique, makes it possible to use not only forms with correct, but also complex geometric parameters, which, in turn, allows you to apply this method of calculation in the manufacture of complex architectural elements. The method of determining the swelling coefficient allows us to estimate the ability of the concrete mixture of the calculated composition to gas formation with sufficient accuracy for practical use, empirically, which allows us to design aerated concrete mixtures with a wide range of water-solid ratio. The article presents data on the results of testing the developed technique, confirming its effectiveness.

Keywords: non-autoclaved aerated concrete, micro-filler, ground granite screenings, composition, non-autoclaved aerated concrete mixture, design density.

For citation: Samuilov Yu. The Method of Determining the Composition of the Concrete Mixture to the Required Density of Nonautoclaved Aerated Concrete on Micro Filler of Dispersed Granite Dropout. Contemporary Issues of Concrete and Reinforced Concrete: Collected  Research Papers. Minsk. Institute BelNIIS. Vol. 10. 2018. Pp. 214–232. https://doi.org/10.23746/2018-10-14 (in Russian)




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