276 documents found, page 1 of 28
Impact of combined action of chloride and carbonation on cement-based materials...
Malheiro, Raphaele; Camões, Aires; Meira, Gibson; Reis, Rui; Nóbrega, AlineIntegrating waste and industrial by-products into concrete is an alternative way to reduce global cement consumption, enhancing its eco-friendliness. In this context, residues with fly ash have been increasingly utilised. Considering the vulnerability of concrete with fly ash to carbonation and, at the same time, its high resistance to chlorides, it is important to investigate the behaviour of these concretes u...
Contemporary strategies for the structural design of multi-story modular timber...
Tenório, Marina; Ferreira, Rui Pedro de Sousa Guimarães; Barros, Victor Vieira Belafonte; Sousa, Filipe Soares; Meireis, CláudioModular timber construction embodies a pioneering and eco-friendly methodology within the building sector. With the notable progress made in manufacturing technologies and the advent of engineered wood products, timber has evolved into a promising substitute for conventional materials such as concrete, masonry, and steel. Beyond its structural attributes, timber brings environmental advantages, including its in...
Thermal performance and durability evaluation of Arundo donax towards an improv...
Malheiro, Raphaele Lira Meireles Castro; Morillas, Aurora; Ansolin, Adriana; Fernandes, Jorge Emanuel Pereira; Camões, Aires; Amorim, M. T. Pessoa deBio-based and natural building materials can support the building sector to reduce its environmental impact. In this study, experimental research was developed to evaluate the performance of giant reed when used as a building thermal insulation. Reed was chosen due to its high availability and close relationship to Portuguese vernacular architecture. The role of the reed’s origin in this context, its physical c...
Assessment of the physical-mechanical performance of magnesium-based fiber ceme...
Azevedo, A. G. S.; Freitas, T. O. G.; Molano, J. C. A.; Trevisan, H. R.; Parente, I. M. S.; Savastano, H.; Faria, Paulina; Camões, AiresIn the search for unconventional binders that reduce energy consumption in production, magnesium oxysulfate (MOS) cement is an alternative. Besides that, the carbon dioxide (CO2) has been used to curing some products of MOS cement, for instance, magnesium fiber cement because this method improves their performance. The aim of this paper is to evaluate the effect of pre-curing before accelerated carbonation on t...
Photocatalysis of functionalised 3D printed cementitious materials
Zadeh, Behzad Zahabi; Rocha Segundo, Iran Gomes da; Pereira, João; Freitas, E. F.; Camões, Aires; Teixeira, Vasco M. P.; Costa, Manuel F. M.The main objective of this study was to evaluate the photocatalytic behaviour of 3D printed cementitious mortars that were functionalised with TiO2 nanoparticles. This study is one of the few available regarding functionalisation of 3D concrete printing (3DCP) with photocatalytic properties. Despite the fact 3DCP research is swiftly growing, it is still necessary further investigation to fully understand these ...
Experimental evaluation of glulam made from portuguese eucalyptus
Suleimana, Aiuba; Peixoto, Bárbara C.; Branco, Jorge M.; Camões, AiresEngineered wood products (EWPs) have evolved over time to become a popular and sustainable alternative to traditional lumber by offering design flexibility, increased strength, and improved quality control. This work analyzes the potential of Portuguese eucalyptus wood (Eucalyptus globulus) to produce glued-laminated timber (glulam) for structural applications. Currently, this hardwood is used for less noble ap...
Effect of using biomass fly ash on the concrete sustainability
Teixeira, Elisabete Rodrigues; Camões, Aires; Branco, Fernando G.Biomass fly ash has been studied has a partial cement material, since this material has a positive effect on concrete properties. Even though, some mixes with BFA presents a positive benefit, they need to be economically competitive and present a good environmental performance. So, the analyse and comparison of concrete that uses BFA as raw material substitution in terms of environmental impacts related to the ...
Utilização do pó de vidro como substituto parcial do cimento: uma abordagem exp...
Malheiro, Raphaele Lira Meireles Castro; Moreira, Bruna; Pontes, Klauss; Jesus, Carlos Manuel Gonçalves; Camões, AiresA redução do consumo do cimento através da sua substituição parcial por resíduos industriais com características pozolânicas tem sido uma estratégia com eleva aceitação. O potencial de utilização do pó de vidro (PV) como substituto parcial do cimento tem sido investigado. Sendo um material com elevado teor de sílica, o vidro moído, numa finura adequada, pode apresentar uma atividade pozolânica significativa. Ne...
Effect of using biomass fly ash on the concrete sustainability
Teixeira, Elisabete Rodrigues; Camões, Aires; Branco, Fernando G.Biomass fly ash has been studied has a partial cement material, since this material has a positive effect on concrete properties. Even though, some mixes with BFA presents a positive benefit, they need to be economically competitive and present a good environmental performance. So, the analyse and comparison of concrete that uses BFA as raw material substitution in terms of environmental impacts related to the ...
Report of RILEM TC 281-CCC: outcomes of a round robin on the resistance to acce...
Vanoutrive, Hanne; Van den Heede, Philip; Alderete, Natalia; Andrade, Carmen; Bansal, Tushar; Camões, Aires; Cizer, Özlem; De Belie, Nele; Ducman, VilmaThis report has been prepared by members of the working groups 1 and 2 within a framework of RILEM TC 281-CCC “Carbonation of concrete with supplementary cementitious materials” and further reviewed and approved by all members of the RILEM TC 281-CCC.; Many (inter)national standards exist to evaluate the resistance of mortar and concrete to carbonation. When a carbonation coefficient is used for performance com...