Influence of vapour permeability of internal and outward plaster on warmly moisture balance of wall from autoclave aerated concrete

Abstract

Annotation. Purpose.One of variants of decision of problems of energy saving, for Ukraine, there is erection of new buildings and buildings from an autoclave aerated concrete. This material possesses heat conductivity coefficient comparable with heat-insulation materials, here being construction and heat insulation, that allows to erect the both self-supported and bearings walls from him. At the thickness of a wall construction 0,4-0,5 m, normative thermal resistance is provided for any region of Ukraine, while, for example, from a brick ceramic hollow a thickness must make 1,4-1,8 m. However much the wrong choice of decorative-protective coverage, and in particular clout, levels heat-insulation and constructive properties of such constructions, diminishes longevity of buildings and buildings. It is therefore necessary to probe influence of properties, and in particular, vapour permeability, internal and outward plaster on warmly moisture conditions balance of a wall construction and to give recommendations on their application. Methodology.Results are got by the calculation of presence and size of area of condensation, through the special programs intended for the calculation of warmly moisture conditions balance of wall construction, on the basis of experimental and literary information of fiziko-mechanical and heating engineering descriptions of the gazobetonnoy laying and clout solutions, for the internal and outward finishing. Results.Graphic dependences of influence of fizikomechanical and heating engineering descriptions of clout solutions are got, for the internal and outward finishing, on a presence and size of area of condensation, in a wall construction, executed from an ААС. It is marked that on a presence and size of area of condensation has influence vapour permeability not only outward, but internal plaster. It is rotined that at presence of outward plaster with low vapour permeability, at different combinations internal, optimum warmly moisture conditions balance of a wall construction is not provided. At presence of outward plaster with high vapour permeability it is possible to provide not only the minimum area of condensation but also give that condensation of vaporous moisture can avoid in a wall construction. And it will provide optimum warmly moisture conditions balance of a wall construction, minimum heatlosses, increase of its longevity. Practical meaningfulness.Using findings, designers and builders, able correctly to appoint such clout solutions for the outward and  internal finishing, that will provide optimum warmly moisture conditions balance of a wall construction, minimum heatlosses, increase of its longevity. Practical meaningfulness. Using findings, designers and builders, able correctly to appoint such clout solutions for the outward and internal finishing, that will provide optimum warmly moisture conditions of a wall construction, minimum heatlosses, increase of its longevity.