Boyko T. Stepwise organization structure and management of the properties of foam

The object of study - foam concrete of non-autoclaved hardening of the average density of 600 kg/m3 and physical models of composite building materials of dense and macroporous structure; research methods - physical and mechanical characteristics of the source of raw materials as well as aerated concrete was defined by standard methods, which regulated of standards in Ukraine. Processing of the results of the experimental work was carried out by computer programs Adobe Photoshop CS3, Excel and Delphi; results - methods of designing of content are developed and a set of measures to manage physical and mechanical properties of the foam concrete at the expense of rational relations between the solid, liquid and gaseous phases was proposed; in the foam concrete structure parameters such as the elements and connections between them was highlighted. It is shown that the physical and mechanical properties of composite building materials was depend on the length of the inner surface of the section; methods of quantitative estimation of structural parameters on physical models of dense material and the porous structure using a digital video recording and processing of fixations on a personal computer was proposed; determined that the strength of the foam concrete are depends on the initial content of the solid phase and is oscillatory in nature, that is inherent in systems that organize themselves; novelty of results - in the cement stone as the matrix material of the foam concrete and in the foam concrete the structural elements of the solid phase and the inner surface of the section were identified, how the qualitative characteristics that determine the properties of the material. It is shown and confirmed that the physical and mechanical properties of composite building materials depend on the geometry of structural elements and the length of the internal interfaces; physical models for the study of structure of composite materials and dense and macroporous structure have been proposed. Methods of evaluation and quantification of structural parameters of the solid component such as the elements of the solid phase, the length of the internal interfaces etc. has been proposed. On the example of foam concrete and foam gypsum effects of phase relations in various stages of organization structure on the physico-mechanical properties was studied. It is revealed that this effect is oscillatory in nature, which is characteristic of self-organizing systems. Undulating nature of the dependence indicates that at certain ratios of phases most favorable conditions for structure formation of foam concrete are created; On the basis of a systematic approach and the results of experiments technique of designing of rational content of foam concrete has been developed. The proposed method takes into account the phenomenon of self-organizing systems and allows you to at minimum cost assign a content, which provides the necessary properties of the foam concrete; introduction of results - the obtained in the thesis results were included in the framework of technological regulations on the manufacture of building blocks of non-autoclaved foam concrete. On the recommendation of the author in the period from 2008 to 2010 on the PBC "Profstroykomplekt" more than 1.5 thousand m3 of foam concrete was produced.