Comparative Analysis of the Thermal Conductivity of Handmade and Mechanical Bricks Used in the Cultural Heritage
Metadatos
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MDPI
Materia
Thermal conductivity Heat flow tests Bricks Brick masonry Energy efficiency Cultural heritage
Fecha
2022-06-04Referencia bibliográfica
Cabeza-Prieto, A... [et al.]. Comparative Analysis of the Thermal Conductivity of Handmade and Mechanical Bricks Used in the Cultural Heritage. Materials 2022, 15, 4001. [https://doi.org/10.3390/ma15114001]
Patrocinador
Spanish Government BIA2015-68449; European Commission BIA2015-68449; Universidad de ValladolidResumen
During interventions to improve the energy efficiency of cultural heritage, it is common
to use methodologies that are used for current buildings with different thermal behaviour. For this
reason, research has been carried out on the thermal behaviour of old brick walls by carrying out
thermal flow tests in the laboratory on brickwork specimens, in order to compare the behaviour
of handmade bricks and mechanical bricks from more than a century ago, and to analyse the
relationship between the values of thermal conductivity, humidity, density and porosity, as well as to
compare these results with those obtained by applying the procedure of the EN-1745 standard. It
was concluded that bricks behave thermally differently, depending on the manufacturing process:
handmade or mechanical, in both types of brick it was found that the higher the moisture content
and density were, the higher the brick’s thermal conductivity value. It has also been concluded that
old bricks have thermal conductivity values different from those indicated in EN-1745 as a function
of density, and that the ratio detected in these specimens in the dry state and in the wet state does not
conform to the processes indicated in the standard. With regard to porosity, it is important to note
that the greater the closed porosity, the lower the conductivity. It has been concluded that in order to
intervene in cultural heritage buildings, it is necessary to carry out a specific study of the behaviour
of the systems with which they were constructed.