## 3 Results and Discussion
Effect of Reflective Partitions on the Quality of Foam Concrete Mixture and Power Consumption (Stage 2)  
The effect of the number of partitions (\(J\)) and the ratio of the partition width to the mixer diameter (\(b\)/\(D\)) on the power consumed for mixing was discussed in [22; 23]. In [24], it was shown that the power consumed for mixing increases with an increase in the number and width of reflective partitions. In [22], it was shown that, with an increase in the width and number of partitions, the maximum power consumed for mixing is achieved. Moreover, these authors showed that a slight inclination of the partitions or their distance from the vessel walls did not significantly affect the power spent on mixing and mixture quality. Determination of the effect of the normalized width and the number of partitions on the power factor of the mixer drive \(k_{N2}\) and the homogeneity coefficient \(K_{clm}\) of foam concrete mixture was carried out in a cylindrical mixer with a conical part and three-blade activator by mixing a foam concrete mixture of constant composition. The constant rotation speed of the activator was equal to 500 rpm. The obtained experimental results are shown in Figures 6 and 7. Figure 5: Influence of the ratio \(H_{mix}\)/\(D\) on the power \(k_{N1}\) spent on mixing (experimental data). Analysis of the data shows that, with an increase in the width of the reflective partitions, the power consumed for mixing increased. The homogeneity coefficient of the mixture sharply increased to the values of _b/D_ = 0.04-0.06, while a further increase in the width of the reflective partitions insignificantly affected the increase in the homogeneity of the mixture. According to the data of Figure 7, it can be concluded that, in the range of _b/D_ = 0.04-0.06 with lower energy consumption, it is possible to obtain a high-qualitative (homogeneous throughout the volume) foam concrete mixture. Effect of the Shape of the Conical Part of Mixer on the Homogeneity of Foam Concrete Mixture and Power Consumption (Stage 3)  
Until now, there have been no systematic studies that could give an answer to the question of how the shape of mixer affects power consumption and mixing efficiency [25, 26, 27, 28, 29]. To determine the influence of the of the lower part of the turbulent mixer on mixing efficiency and power consumption, the studies were carried out on a mixer with a cylindrical part and removable conical parts (Figure 3). Power and density were measured similarly to the first stage of the study. The experimental results are shown in Figures 8 and 9. Figure 6: Uniformity coefficient \(K_{clm}\) of foam concrete mixture vs. normalized width _b/D_ and number \(J\) of reflective partitions (experimental data). Figure 7: Influence of parameter _b/D_ on the power factor of mixer drive _k_N2 (experimental data). Analysis of the results shows that an increase in the preparation time of foam concrete mixture up to 5 min led to an increase in its homogeneity, regardless of the angle of inclination \(\alpha_{cone}\) of the conical part of mixer (Figure 8). However, for a fixed mixing time (Figure 9, at \(t\) = 180 s), a change in the angle of inclination of the conical part \(\alpha_{cone}\) from \(20^{\circ}\) to \(60^{\circ}\) led to an increase in the quality of mixture. With an increase in the angle of inclination \(\alpha_{cone}\) over \(60^{\circ}\), a decrease in the homogeneity coefficient was observed, explained by a decrease in the axial component of turbulent mixing velocity. The analysis of the power consumption for the preparation of foam concrete mixture shows that an increase in the angle \(\alpha_{cone}\) from \(20^{\circ}\) to almost \(60^{\circ}\) led to an increase in the values of \(k_{N3}\) (Figure 10). A further increase in the angle \(\alpha_{cone}\) of inclination of the conical part led to a sharp increase in power consumption. Figure 8: Homogeneity coefficient of foam concrete mixture vs. mixing time \(t\) at different tilt angles of the conical part of turbulent mixer (experimental data).