TY - JOUR
T1 - A feasible re-use of an agro-industrial by-product
T2 - Hazelnut shells as high-mass bio-aggregate in boards for indoor applications
AU - Cintura, Eleonora
AU - Faria, Paulina
AU - Molari, Luisa
AU - Barbaresi, Luca
AU - D'Orazio, Dario
AU - Nunes, Lina
N1 - Funding Information:
info:eu-repo/grantAgreement/FCT//PD%2FBD%2F150579%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04625%2F2020/PT#
The authors acknowledge Lorenzo Coraglia (Raccolti di CIN) for giving information about the harvested hazelnut and donating the hazelnut shells to carry out this research project; Matteo Cingolani to carry out the acoustic analysis; Mirko Braga (Ingessil S.r.l.) for his help and suggestion to use the sodium silicate solution as adhesive; Stefania Liuzzi (Polytechnic University of Bari) to provide suggestions to carry out the research; Anna Rovigatti for the important support for the acoustic analysis. The authors also acknowledge lab technicians of the University of Bologna (DICAM and DIN) that allowed to carry out the laboratory tests.
Publisher Copyright:
© 2023 The Authors
PY - 2024/1/1
Y1 - 2024/1/1
N2 - The present work investigates the feasibility of producing boards, with unconventional materials, namely hazelnut shells as a high-mass bio-aggregate and a sodium silicate solution as a no-toxic adhesive, and discusses possible applications based on an extensive characterization. The aim is to define a feasible reuse of a largely produced agro-industrial by-product to reduce the high environmental impact caused by both the construction and the agriculture sectors, by proposing a building composite that improves indoor comfort. The presented combination of aggregate-adhesive generated a product with characteristics interesting to explore. The thermal conductivity is moderated, and the composite achieved values of σmax = 0.39 N/mm² for flexural strength and σmax = 2.1 N/mm² for compressive strength, but it showed high sorption capacity with a moisture buffering value of about 3.45 g/(m² %RH), and a peak of sound absorption between 700 and 900 Hz. Therefore, the boards' most promising performance parameters seem to be their high hygroscopicity and acoustic absorption behaviour, namely in the frequency range of the human voice. Hence, the proposed composite could improve indoor comfort if applied as an internal coating board.
AB - The present work investigates the feasibility of producing boards, with unconventional materials, namely hazelnut shells as a high-mass bio-aggregate and a sodium silicate solution as a no-toxic adhesive, and discusses possible applications based on an extensive characterization. The aim is to define a feasible reuse of a largely produced agro-industrial by-product to reduce the high environmental impact caused by both the construction and the agriculture sectors, by proposing a building composite that improves indoor comfort. The presented combination of aggregate-adhesive generated a product with characteristics interesting to explore. The thermal conductivity is moderated, and the composite achieved values of σmax = 0.39 N/mm² for flexural strength and σmax = 2.1 N/mm² for compressive strength, but it showed high sorption capacity with a moisture buffering value of about 3.45 g/(m² %RH), and a peak of sound absorption between 700 and 900 Hz. Therefore, the boards' most promising performance parameters seem to be their high hygroscopicity and acoustic absorption behaviour, namely in the frequency range of the human voice. Hence, the proposed composite could improve indoor comfort if applied as an internal coating board.
KW - Acoustic absorption
KW - Granular material
KW - Hygroscopicity
KW - Mechanical property
KW - Sodium silicate
KW - Thermal property
UR - http://www.scopus.com/inward/record.url?scp=85181057429&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2023.140297
DO - 10.1016/j.jclepro.2023.140297
M3 - Article
AN - SCOPUS:85181057429
SN - 0959-6526
VL - 434
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 140297
ER -
