The moisture regime calculation of single-layer enclosing structures on the basis of the discrete-continuum method application

Abstract

The paper examines a number of moisture regime mathematical models. Engineering method for unsteady-state moisture regime calculation using discrete-continuum method based on Gagarin’s moisture potential was proposed. A new formula for moisture potential determination in any section of single-layer enclosing structure, at any time, under continuous control for temperature distribution, was derived. Separate methods of moisture potential theory: Gagarin’s method, Kozlov’s method, and new discrete-continuum method – were compared. Single-layer enclosing structure made of aerated concrete D400 with inner and outer plastering was used as a research sample. It is shown that the proposed discrete-continuum method gives moisture distribution results for the enclosing structure similar to moisture distribution results calculated by Gagarin’s unsteady-state method. Results can be obtained by a finite formula without numerical method. It was found out that the discrete-continuum method takes moisture transfer response rate into account.