Produção Nacional
Revisado por pares
Precast concrete sandwich panels (PCSP): An analytical review and evaluation of CO2 equivalent
2022; Elsevier BV; Volume: 358; Linguagem: Inglês
10.1016/j.conbuildmat.2022.129424
ISSN1879-0526
AutoresThainá Faria Oliveira, José Maria Franco de Carvalho, Júlia Castro Mendes, Gabriela Zuqui Souza, Victor Rezende Carvalho, Ricardo André Fiorotti Peixoto,
Tópico(s)Innovations in Concrete and Construction Materials
Resumo• A knowledge gap regarding PCSPs life cycle assessment was identified. • Despite high kgCO 2 eq·m −2 , PCSPs with VIP showed the best thermal performances. • Lowest CO 2 eq for PCSP with 10 mm concrete outer layers and a 120 mm EPS core. • Portland cement accounts for 70 to 95 % of the CO 2 eq in the concretes reviewed. This work presents a literature research on the structural, thermal, densitometric, and environmental aspects of Precast Concrete Sandwich Panels (PCSPs), with the environmental assessment focusing on CO 2 equivalent emissions (CO 2 eq). For this purpose, we collected data from PCSPs developed in the last 10 years and carried out a global performance evaluation. The panels presented a final bending moment capacity between 3 and 44 kN·m·m −1 , the weight per m 2 ranged from 45 to 368 kg, the thermal transmittance (U-value) ranged from 0.10 to 4.25 W · m −2 ·K −1 and the CO 2 eq varied from 18 to 163 kg · CO 2 ·m −2 . The authors concluded that the best levels of eco-efficiency were linked to the replacement of Portland Cement with alternative binders. The PCSPs with the best balance of thermal, structural, densitometric, and eco-efficient performance had their outer layer reinforced with steel, fiberglass, or carbon mesh. Additionally, they used continuous connectors, longitudinal shear connectors, or no connectors; and their insulation core comprised Extruded Polystyrene or Expanded Polystyrene.
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