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Journal of Building Physics
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Can Moisture Buffer Performance be Estimated from Sorption Kinetics?

J. M. P. Q. Delgado

LFC - Laboratório de Física das Construções, Departamento de Engenharia Civil, Faculdade de Engenharia da Universidade do Porto, Rua Dr Roberto Frias, s/n 4200-465 Porto, Portugal

N. M. M. Ramos

LFC - Laboratório de Física das Construções, Departamento de Engenharia Civil, Faculdade de Engenharia da Universidade do Porto, Rua Dr Roberto Frias, s/n 4200-465 Porto, Portugal

V. P. De Freitas

LFC - Laboratório de Física das Construções, Departamento de Engenharia Civil, Faculdade de Engenharia da Universidade do Porto, Rua Dr Roberto Frias, s/n 4200-465 Porto, Portugal, vpfreita{at}fe.up.pt

This article describes the research on the moisture buffering effect of building materials. A set of experiments on samples of current building materials are conducted under transient conditions of relative humidity (RH).

The results obtained are then analyzed using kinetics models. The experimental settings are based on the moisture buffer value (MBV) test method currently under study by Nordic researchers. The main result from these tests is the MBV number that can be used to characterize the moisture buffer performance of a material or a system.

The application of kinetics models to the experimental results is explored and several parameters are retrieved. A proposal for the use of these parameters is presented and its practical use is discussed.

Key Words: kinetics models • sorption curves • moisture buffer value • building materials

Journal of Building Physics, Vol. 29, No. 4, 281-299 (2006)
DOI: 10.1177/1744259106062568
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