Dependence of the Quality of the Foam Concrete Mixture on Its Mixing Modes

In order to make a foam concrete mixture, based on the analysis of a priori information, a single-stage technology was used. During the preparation of the mixture, a laboratory turbulent three-bladed mixer with a conical part and reflective partitions was used. A mixer was used to ensure the slurry process of particles in the mixing mass. The authors considered the features that need to be paid attention to in the process of mixing such dispersed systems as “solid phase – liquid”. Such systems are characterized by high particle deposition rates. This condition can also be used for foam concrete mixtures. Experiments were conducted on the effect of the activator rotation speed on the homogeneity of mixing of the foam concrete mixture. The distributions of suspended particle concentrations over the radius and height of the mixer are considered. The dependences of the structural homogeneity of the mixture on the speed of rotation of the activator and the time component of the mixing process are analyzed. It was found that the rise of particles and increased power consumption is affected by changing the height of the agitator installation above the bottom, namely, its reduction. It is established that the efficiency of the designed mixers depends to a greater extent on the requirements for the indicator of uniformity of the concentration distribution in the foam concrete mixture. The higher the requirements for the uniformity indicator, the more power increases. An excessive reduction in the requirements for the degree of uniformity of the foam concrete mass may contribute to the deposition of some of the solid phase on the bottom of the mixer, which will lead to heterogeneity of the mixture.