abstract
Innovative and multifunctional building materials with low embodied energy and reduced CO2 emissions have attracted considerable attention. Herein, a comprehensive comparison between the use of cork and commercial synthetic aggregates (expanded vermiculite, expanded polystyrene (EPS), and lightweight expanded clay (Leca (R))) in the production of geopolymer composites was performed. Additionally, composites containing rubber coming from the recycling of end-of-life tires were also studied. The impact of the aggregate nature and amount on the geometric density, compressive strength, thermal conductivity, sound absorption coefficient, and thermal stability of the composites was evaluated. This investigation demonstrates the feasibility of tuning the geopolymer composites properties according to the envisioned application, cork-composites being the most suitable approach for sound absorbing panels (alpha = 0.8, 2000-3150 Hz), while Leca (R) and expanded vermiculite containing composites are the best option when considering fire resistant applications.
keywords
BIOMASS FLY-ASH; INSULATION MATERIALS; ACOUSTIC ABSORPTION; THERMAL-PROPERTIES; ULTRA-LIGHTWEIGHT; CONCRETE; PERFORMANCE; RUBBER; BEHAVIOR; WASTE
subject category
Construction & Building Technology; Engineering; Materials Science
authors
Alves, Z; Carvalheira, J; Senff, L; Lacasta, AM; Cantalapiedra, IR; Labrincha, JA; Novais, RM
our authors
João António de Sousa Carvalheiras
PhD Student
João António Labrincha Baptista
Full professor
Luciano Senff
Post-Doc Fellowship
Rui Miguel Novais
Assistant Professor
Zélia Ribeiro Alves
Junior ResearcherProjects
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 (DOI 10.54499/UIDB/50011/2020), UIDP/50011/2020 (DOI 10.54499/UIDP/50011/2020) & LA/P/0006/2020 (DOI 10.54499/LA/P/0006/2020), financed by national funds through the FCT/MCTES (PIDDAC). The authors would like to thank the project SMART-G (ERA-MIN/0001/2019) (http://doi. org/10.54499/ERA-MIN/0001/2019), sponsored by FCT. Joao Carvalheiras (SFRH/BD/144562/2019) wishes to thank Fundacao para a Ciencia e Tecnologia (FCT) for supporting his work.