All levels of the product heterogeneities, including the product itself, are open complex systems, which are organizing themselves in autopoiesis mode. Such order of structure formation assumes a certain selectivity of the organization of the system while maintaining its openness to the influence of the environment. Factors of control may only initiate structural changes, but do not determine in what ways they will occur. The mechanisms of the structure organization at the selected levels of heterogeneities are qualitatively differing. Individual complex of processes and the phenomena is realized at each level; however, all heterogeneities are in the multi-scale co-ordination and influence each other, causing the interconnected structural variations. This supports the self-organization of the material structure. The mutual influence of the structural self-organization of individual levels of heterogeneities at the formation of the integral concrete structure is analyzed. Deformations determine the structure formation and functioning of concrete. Controlling the manifestation of deformation allows providing a directed structure of the material. For receiving the given sets of active elements, the factors controlling the processes of organization of micro- and macrostructures of concrete are accepted.
It is shown that construction material changes its properties as a result of operational loads action. There are situations when construction leaves its working state with satisfactory material characteristics. This is due to the process of formation and development of cracks as structural elements. The article proposes to analyze history of the development process, which makes it possible to study mechanisms of its flow and to determine factors of process control. The analysis of the studies carried out on the effect of prescriptional and technological factors on the properties of materials and products, the phenomena of self-organization and the role of cracks in materials and products showed that the emergence of critical events cannot be foreseen when assessing properties accepted by averaged characteristics. The construction is considered to be a complex self-organizing system. This determined the work aim: to justify the choice of dynamic models, allowing to determine the structure elements, interaction of which ensures functional state of the structure. The qualitative method of verbal description of the structure of systems with the use of cognitive approaches was laid in basis of adopted methodology. Conservative, metastable and active elements are distinguished in the construction-system. It is emphasized that the active history of the system is determined by active elements, to which cracks refer to. Cracks are considered as some necessary structural elements, present at all scale levels. It is shown that the formation of cracks-systems, treated as parasitic systems, terminates the end of construction-system development and the beginning of parasite system development. Completion of crack-system life cycle removes the construction-system from its working state. To get constructions with a given set of structural elements, a creative community of materials and designers is needed, which will create a common terminology dictionary for both specializations.
Abstract. Formation of the scientific ideology is based on the basic model of the structured medium and demands the formalization of the term «structure». The objects-systems are offered to be present in the form of models. It is shown that the mechanism of structure formation on the solid level where gravity prevails differs from mechanism of structure formation at the level where forces of interparticle interactions dominate. It is asserted that geometrical characteristics of products define conditions of the organization of its integral structure. Rather independent coexistence of various solid levels assumes spontaneous realization of various interconnected events which provides the wholeness and safe functioning of a construction-system.
The purpose of the work is to increase resistance of concrete in conditions of multiple freezing-thawing and wetting-drying cycles. An important property of concrete is its ability to adapt to the periodical effect of external factors by self-organization of the structure. It assumes the presence at the material of active elements capable of changing their parameters adequately to impacts. Such elements include cracks and inner surfaces of partition as integral elements of the structure of any material. Sets of active elements can be to obtained by directing the structural organization of concrete. The operating factor of structure formation can be a change in the ratio of adhesion and cohesive bonding forces at the surface of partition between the matrix material and the fillers. Concrete the structure of which was initiated by selective adhesion of a matrix to the surface of fillers differed in the raised values of properties. Structural potential has determined resistance of concrete at freezing-thawing and wetting-drying. Sets of active elements of concrete structure are the factors of safe functioning of building constructions in conditions of influence of the operating environment.
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