Resistance of concrete and expanded clay concrete under periodic external influences

Odessa State Academy Civil Engineering and Architecture, Didrihsona St. 4, 65029 Odessa, Ukraine

Abstract

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.