Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental characterisation of hygrothermal properties of a 3D printed cementitious mortar
3D printing (3DP) presents great potential for automation, sustainability, and quality control in the construction sector. However, research on 3DP in Construction has been carried out primarily from a structural standpoint, and information on the thermal performance, comfort and energy efficiency of these solutions remains very limited. Given the importance of assessing how printed walls perform when subjected to hygrothermal solicitations, this work experimentally analyses a cement-based mortar specially developed for 3DP. An extensive laboratory campaign was carried out, and the following set of physical, hygric and thermal properties was obtained: the dry bulk density, saturation moisture content, specific heat capacity, porosity, water absorption due to capillary action, water vapour permeability, thermal conductivity (dry and moisture-dependent), and the sorption isotherm. The results show that the 3D printed cement-based mortar, which presents a dry density of 2060 kg/m3 and a thermal conductivity of 1.33 W/(m K), has a hygrothermal performance comparable to that of traditional cast concrete. This indicates that additional thermal insulation materials are required for appropriate thermal performance through the building envelope. Moreover, this detailed hygrothermal characterisation is suitable for design purposes, allowing the use of the obtained properties in future numerical simulations, important for studying the hygrothermal performance of printed building elements in service.
Experimental characterisation of hygrothermal properties of a 3D printed cementitious mortar
3D printing (3DP) presents great potential for automation, sustainability, and quality control in the construction sector. However, research on 3DP in Construction has been carried out primarily from a structural standpoint, and information on the thermal performance, comfort and energy efficiency of these solutions remains very limited. Given the importance of assessing how printed walls perform when subjected to hygrothermal solicitations, this work experimentally analyses a cement-based mortar specially developed for 3DP. An extensive laboratory campaign was carried out, and the following set of physical, hygric and thermal properties was obtained: the dry bulk density, saturation moisture content, specific heat capacity, porosity, water absorption due to capillary action, water vapour permeability, thermal conductivity (dry and moisture-dependent), and the sorption isotherm. The results show that the 3D printed cement-based mortar, which presents a dry density of 2060 kg/m3 and a thermal conductivity of 1.33 W/(m K), has a hygrothermal performance comparable to that of traditional cast concrete. This indicates that additional thermal insulation materials are required for appropriate thermal performance through the building envelope. Moreover, this detailed hygrothermal characterisation is suitable for design purposes, allowing the use of the obtained properties in future numerical simulations, important for studying the hygrothermal performance of printed building elements in service.
Experimental characterisation of hygrothermal properties of a 3D printed cementitious mortar
Mendes Pessoa, Sofia (Autor:in) / Jesus, Manuel (Autor:in) / Moreira dos Santos Guimarães Teixeira, Ana Sofia (Autor:in) / Lucas, Sandra S. (Autor:in) / Simões, Nuno (Autor:in)
01.12.2023
Mendes Pessoa, S, Jesus, M, Moreira dos Santos Guimarães Teixeira, A S, Lucas, S S & Simões, N 2023, 'Experimental characterisation of hygrothermal properties of a 3D printed cementitious mortar', Case Studies in Construction Materials, vol. 19, e02355. https://doi.org/10.1016/j.cscm.2023.e02355
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
624
Experimental characterisation of hygrothermal properties of a 3D printed cementitious mortar
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