Selection of Mixers for Preparation of Quality Building Mixtures

The preparation of building mixtures is a large segment of the construction industry and the testing base of the mixing equipment. The proposed mixing equipment does not always ensure the preparation of quality building mixtures. Therefore, the issue of choosing a reliable mixing equipment is relevant. The problem of a rational choice of mixing equipment for the qualitative preparation of various mixtures is disclosed. An important condition when choosing equipment is to improve the quality of mixing and mechanization of work. To solve the problem, the analysis of design and technical and economic indicators of mixing equipment was carried out. Dependencies are established, binding internals of mixtures with its composition and technical characteristics of the proposed mixers are obtained. The ways of mixer rational selection providing for a high degree of uniformity of mixtures are recommended. The rational speeds of the working bodies of the mixers are proposed. The dependences of the Reynolds number on the rotational speed of the mixing drum and the diameter, between the power and the diameter of the drum, are established. The proposed method of choosing a rational nomenclature of technological equipment for mixing will significantly reduce the cost of operating mixed machines and improve the quality of mixtures.