Resumo (PT):
Abstract (EN):
The treatment of rising damp in historical building walls is a very complex procedure. In this work it is
presented an extension of the continuous “in situ” results of the rising damp treatment conducted in a
Portuguese historical church, using the wall base ventilation technology. The results, registered over four
years, clearly reveal the best ventilations periods and indicate that the best solutions must correspond
to admit outside air during summer periods and inside air during winter periods. Furthermore, another
important aspect was to better understand the difference in absorption behaviour between walls with
and without joints when the rising damp treatment is conducted. It also presented an experimental
campaign and a critical analysis of water absorption in samples of clay brick with and without joints and
joints with different contact configurations (perfect contact, hydraulic continuity and air space between
layers). The results showed that when the moisture reaches the interface,the wetting process gets slower
due to the interfaces hygric resistance. This resistance was more pronounced for joints with air space
between layers and less for joints with hydraulic continuity.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
6