Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Can mussel shell waste optimize cement and air lime mortars hygrothermal performance?
[Abstract]: Mussel shells used as aggregates for mortars have flaky and irregular particles, which significantly increases the pore volume. This leads to the identification the microstructure of mussel shell mortars as a light and porous composite, which could have good hygrothermal properties. In the present study, the density and thermal properties are assessed on cement and air lime mortars, each with three replacement percentages of replacement of conventional sand by mussel shell sand (25 %, 50 % and 75 %), are evaluated and compared with their respective baselines (0 % replacement). Thermal conductivity measurements are also carried out on different loose fractions of the mussel shell aggregate to understand the behaviour of this material without binder matrix. Finally, adsorption and desorption cycles at 80 % and 50 % relative humidity are carried out on loose aggregate fractions and on the eight mortars. The results are very positive for the mussel shell mortars, as it can be concluded that the use of mussel shell aggregates improves the thermal performance and the potential moisture buffering capacity of both cement and air-lime coating mortars. ; This work has been carried out within the framework of the following projects: “Assessment of Galician bivalve shell in the construction sector”; Code 00064742 / ITC-20133094, funded by CDTI and co-financed with European Union ERDF funds. The authors are grateful for the Portuguese Foundation for Science and Technology’s support through funding UIDB/04625/2020 from the research unit CERIS (DOI:10.54499/UIDB/04625/2020), hosting part of the tests. ; Centro para el Desarrollo Tecnológico y la Innovación; 00064742/ITC-20133094 ; Portuguese Foundation for Science and Technology; UIDB/04625/2020
Can mussel shell waste optimize cement and air lime mortars hygrothermal performance?
[Abstract]: Mussel shells used as aggregates for mortars have flaky and irregular particles, which significantly increases the pore volume. This leads to the identification the microstructure of mussel shell mortars as a light and porous composite, which could have good hygrothermal properties. In the present study, the density and thermal properties are assessed on cement and air lime mortars, each with three replacement percentages of replacement of conventional sand by mussel shell sand (25 %, 50 % and 75 %), are evaluated and compared with their respective baselines (0 % replacement). Thermal conductivity measurements are also carried out on different loose fractions of the mussel shell aggregate to understand the behaviour of this material without binder matrix. Finally, adsorption and desorption cycles at 80 % and 50 % relative humidity are carried out on loose aggregate fractions and on the eight mortars. The results are very positive for the mussel shell mortars, as it can be concluded that the use of mussel shell aggregates improves the thermal performance and the potential moisture buffering capacity of both cement and air-lime coating mortars. ; This work has been carried out within the framework of the following projects: “Assessment of Galician bivalve shell in the construction sector”; Code 00064742 / ITC-20133094, funded by CDTI and co-financed with European Union ERDF funds. The authors are grateful for the Portuguese Foundation for Science and Technology’s support through funding UIDB/04625/2020 from the research unit CERIS (DOI:10.54499/UIDB/04625/2020), hosting part of the tests. ; Centro para el Desarrollo Tecnológico y la Innovación; 00064742/ITC-20133094 ; Portuguese Foundation for Science and Technology; UIDB/04625/2020
Can mussel shell waste optimize cement and air lime mortars hygrothermal performance?
Martínez-García, Carolina (Autor:in) / González-Fonteboa, Belén (Autor:in) / Carro-López, Diego (Autor:in) / Faria, Paulina (Autor:in)
23.10.2024
doi:10.1016/j.conbuildmat.2024.138851
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
624
Can mussel shell waste optimize cement and air lime mortars hygrothermal performance?
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