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TitleMechanical and thermal performance characterisation of compressed earth blocks
Author(s)Teixeira, Elisabete Rodrigues
Machado, Gilberto
Junior, Adilson de Paula
Guarnier, Christiane
Fernandes, Jorge Emanuel Pereira
Silva, Sandra Monteiro
Mateus, Ricardo
KeywordsCompressed earth blocks (CEBs)
Compressive strength
Guarded hot box
Thermal transmittance
Issue date10-Jun-2020
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
CitationTeixeira, E.R.; Machado, G.; P. Junior, A.; Guarnier, C.; Fernandes, J.; Silva, S.M.; Mateus, R. Mechanical and Thermal Performance Characterisation of Compressed Earth Blocks. Energies 2020, 13, 2978.
Abstract(s)The present research is focused on an experimental investigation to evaluate the mechanical, durability, and thermal performance of compressed earth blocks (CEBs) produced in Portugal. CEBs were analysed in terms of electrical resistivity, ultrasonic pulse velocity, compressive strength, total water absorption, water absorption by capillarity, accelerated erosion test, and thermal transmittance evaluated in a guarded hotbox setup apparatus. Overall, the results showed that compressed earth blocks presented good mechanical and durability properties. Still, they had some issues in terms of porosity due to the particle size distribution of soil used for their production. The compressive strength value obtained was 9 MPa, which is considerably higher than the minimum requirements for compressed earth blocks. Moreover, they presented a heat transfer coefficient of 2.66 W/(m2·K). This heat transfer coefficient means that this type of masonry unit cannot be used in the building envelope without an additional thermal insulation layer but shows that they are suitable to be used in partition walls. Although CEBs have promising characteristics when compared to conventional bricks, results also showed that their proprieties could even be improved if optimisation of the soil mixture is implemented.
Publisher version
AccessOpen access
Appears in Collections:C-TAC - Artigos em Revistas Internacionais
ISISE - Artigos em Revistas Internacionais

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