A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Gypsum Mortars with Acacia dealbata Biomass Waste Additions ; Effect of Different Fractions and Contents
Funding Information: Acknowledgments: The authors would like to thank the National Laboratory for Civil Engineering of Portugal (LNEC) for the laboratory equipment and the support provided through the projects PRESERVe and REuSE; the Department of Civil Engineering of the NOVA School of Science and Technology of the University of Lisbon, and the Department of R&D of SIVAL—Gessos Especiais, Lda. Funding Information: Funding: This research was funded by Portuguese Foundation for Science and Technology: Alessan-dra Ranesi Doctoral Training Programme EcoCoRe grant number PD/BD/150399/2019 and Civil Engineering Research and Innovation For Sustainability Unit-CERIS (UIDB/04378/2020). Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. ; In recent decades, interest in the eco-efficiency of building materials has led to numerous research projects focused on the replacement of raw materials with mineral and biomass wastes, and on the production of mortars with low-energy-consuming binders, such as gypsum. In this context, five different fractions (bark, wood, branchlets, leaves, and flowers) of Acacia dealbata—an invasive species—were evaluated as fillers for premixed gypsum mortars, at 5% and 10% (vol.) addition levels and fixed water content. Although these biomass fractions had different bulk densities (>50% of variation), all the mortars were workable, although presenting different consistencies. As expected, dry density decreased with biomass addition, but, while mortars with addition at 5% presented a slight shrinkage, a slight expansion occurred with those with 10% addition. Generally, the mechanical properties decreased with the biomass additions even if this was not always proportional to the added content. The wood fraction showed the most positive mechanical results but flexural and compressive strengths of all the tested mortars were found to be higher than the lower standard limit, justifying further studies. ; publishersversion ; published
Gypsum Mortars with Acacia dealbata Biomass Waste Additions ; Effect of Different Fractions and Contents
Funding Information: Acknowledgments: The authors would like to thank the National Laboratory for Civil Engineering of Portugal (LNEC) for the laboratory equipment and the support provided through the projects PRESERVe and REuSE; the Department of Civil Engineering of the NOVA School of Science and Technology of the University of Lisbon, and the Department of R&D of SIVAL—Gessos Especiais, Lda. Funding Information: Funding: This research was funded by Portuguese Foundation for Science and Technology: Alessan-dra Ranesi Doctoral Training Programme EcoCoRe grant number PD/BD/150399/2019 and Civil Engineering Research and Innovation For Sustainability Unit-CERIS (UIDB/04378/2020). Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. ; In recent decades, interest in the eco-efficiency of building materials has led to numerous research projects focused on the replacement of raw materials with mineral and biomass wastes, and on the production of mortars with low-energy-consuming binders, such as gypsum. In this context, five different fractions (bark, wood, branchlets, leaves, and flowers) of Acacia dealbata—an invasive species—were evaluated as fillers for premixed gypsum mortars, at 5% and 10% (vol.) addition levels and fixed water content. Although these biomass fractions had different bulk densities (>50% of variation), all the mortars were workable, although presenting different consistencies. As expected, dry density decreased with biomass addition, but, while mortars with addition at 5% presented a slight shrinkage, a slight expansion occurred with those with 10% addition. Generally, the mechanical properties decreased with the biomass additions even if this was not always proportional to the added content. The wood fraction showed the most positive mechanical results but flexural and compressive strengths of all the tested mortars were found to be higher than the lower standard limit, justifying further studies. ; publishersversion ; published
Gypsum Mortars with Acacia dealbata Biomass Waste Additions ; Effect of Different Fractions and Contents
Ranesi, Alessandra (author) / Faria, Paulina (author) / Correia, Ricardo (author) / Freire, Maria Teresa (author) / Veiga, Rosário (author) / Gonçalves, Margarida (author) / DEC - Departamento de Engenharia Civil / CERIS - Polo NOVA / MEtRICS - Centro de Engenharia Mecânica e Sustentabilidade de Recursos / DCTB - Departamento de Ciências e Tecnologia da Biomassa (ex-GDEH)
2022-03-11
Article (Journal)
Electronic Resource
English
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