Author(s)

J. Kočí, J. Maděra, P. Rovnaníková & R. Černý

Abstract

A combined experimental-computational approach is applied for the estimation of service life of innovative renovation renders. In the experimental part, the durability of two commercial renovation renders is determined in terms of their frost resistance, together with two newly developed renovation plasters that are supposed to be produced commercially in the near future. The computational part is aimed at the investigation of freeze-thaw cycles that may occur in surface layers of the plaster during its life time period. To achieve this, a diffusion type model of coupled heat and moisture transport is used. As a load-bearing structure several materials which are characteristic for historical buildings are chosen, namely ceramic brick, sandstone and arenaceous marl. Keywords: service life estimate, renovation renders, heat and moisture transport, experimental analysis, frost resistance. 1 Introduction In the current practice of historical buildings renovation, the service life of new surface layers is estimated mostly on the basis of experience, because too few parameters are known for reliable durability estimate. Usually the durability is given by the producer of the renovation render, which provides a warranty period only in the case that the technological process is followed precisely. The service

Keywords

service life estimate, renovation renders, heat and moisture transport, experimental analysis, frost resistance