Confirmation of Anomalous Diffusion in Non-saturated Porous Building Materials by a New Capillary Rise Absorption Test

2009 ◽  
pp. 259-259-14
Author(s):  
M Küntz ◽  
P Lavallée ◽  
J Chevalier ◽  
P Riopelle ◽  
M Goyer
Keyword(s):  
Anomalous Diffusion ◽  
Building Materials ◽  
Capillary Rise ◽  
Absorption Test ◽  
Porous Building Materials

Anomalous Diffusion during Water Absorption in Porous Building Materials – Experimental Evidence

2008 ◽  
Vol 273-276 ◽  
pp. 156-161
Author(s):  
N.M.M. Ramos ◽  
João M.P.Q. Delgado ◽  
V.P. de Freitas
Keyword(s):  
Anomalous Diffusion ◽  
Building Materials ◽  
Moisture Diffusion ◽  
Building Structures ◽  
Total Water ◽  
Clay Brick ◽  
Transform Method ◽  
Porous Building Materials ◽  
Aerated Concrete ◽  
Good Agreement

The sorption and transport of water in two porous building materials, clay brick and autoclaved aerated concrete, was studied in detail. The evolution of the distribution of liquid in the porous medium was analysed in terms of the Boltzmann transform method and anomalous diffusion equation proposed by Küntz and Lavallée [1]. The apparent moisture diffusion coefficients of water were determined from the total water profiles using a modified Boltzmann-Matano analysis, and a good agreement with literature values was found. The application of anomalous diffusion model to building materials indicates that the previous 1/ 2 t relation is not entirely accurate to estimate the volume of absorbed water. This result has particular relevance for evaluating the durability of building structures.

A Contribution to the Treatment of Salt Damage in Historical Buildings

2015 ◽  
Vol 824 ◽  
pp. 127-132
Author(s):  
Iñigo Antepara ◽  
Igor Medveď ◽  
Jaromír Žumár ◽  
Robert Černý
Keyword(s):  
Building Materials ◽  
Historical Buildings ◽  
Research Teams ◽  
Porous Building Materials ◽  
Salt Damage ◽  
Advantages And Disadvantages ◽  
Historical Masonry

Salts and water may cause serious damage to historical masonries. Therefore, numerous conservation treatments have been developed by research teams for the consolidation and protection of porous building materials affected by salt attack. Here the focus is on methods for obtaining an effective desalination of historical masonry, indicating their advantages and disadvantages. It is pointed out that cellulose is a favourite material added to poultices used in desalination.

scholarly journals Desalination of porous building materials by electrokinetics: an NMR study

2011 ◽  
Vol 45 (1-2) ◽  
pp. 297-308 ◽  
Author(s):  
Kashif Kamran ◽  
Leo Pel ◽  
Alison Sawdy ◽  
Henk Huinink ◽  
Klaas Kopinga
Keyword(s):  
Building Materials ◽  
Porous Building Materials ◽  
Nmr Study
Sign in / Sign up

Export Citation Format

Share Document