41 documents found, page 1 of 5
Physical and mechanical properties of lightweight concrete with incorporation o...
Jia, Zhiyou; Aguiar, J. L. Barroso de; Jesus, Carlos Manuel Gonçalves; Castro, Fernando; Cunha, Sandra Raquel LeiteIn the lost-wax foundry industry large amounts of ceramic mold casting waste (CMCW) are disposed of in landfills, which not only pollutes the environment but also leads to the loss of secondary resources. On the other hand, with the improvement of building style and performance, the demand for lightweight concrete is also increasing. Therefore, we recycle CMCW into lightweight concrete for environmental and eco...
Experimental characterisation of different ecological substrates for use in gre...
Coelho, Katya; Almeida, João; Castro, Fernando; Ribeiro, André; Teixeira, Tiago; Palha, Paulo; Simões, NunoGreen roofs are made up of several components, including those belonging to the waterproofing and drainage layers, substrate, and vegetation. Of these, the substrate is undoubtedly one of the most important layers of a green roof, contributing not only to the healthy growth of vegetation but also to the water retention capacity and thermal behaviour of the whole solution. Although green roofs are widely recogni...
Development of composites with plastic waste and used foundry sands
Ribeiro, João Miguel Castro; Castro, Fernando; Martins, Carla I.The use of different residues for the production of new composite materials has gained strength in recent years, as it enables reuse of materials and creates value for the residue which would usually be insignificant. This work presents the results of the development of mixed plastic composites using plastic waste and used foundry sands from different origins as fillers. The materials were characterized by diff...
Performance of eco-friendly cement mortars incorporating ceramic molds shells a...
Cunha, Sandra Raquel Leite; Silva, Raphael; Aguiar, J. L. Barroso de; Castro, FernandoThe lost wax foundry industry has been rapidly expanding in recent years, generating a large amount of waste due to the fact that most of the durable goods include castings and the need for dimensional precision castings for specific purposes, such as the automotive and aeronautics sectors. The waste produced by this industry is currently being deposited in landfills because practical applications are not known...
Mortars with the incorporation of treated ceramic molds shells wastes
Cunha, Sandra Raquel Leite; Costa, Daniel; Aguiar, J. L. Barroso de; Castro, FernandoAbout 48 billion tons of aggregates are consumed in the construction, causing a depletion of natural resources. Thus, it is important to apply new solutions that suppress these needs, without environmental impacts and preferably reversing negative impacts associated to other industries, such as foundry industry, a large waste producer commonly deposited in landfills. The main objective of this work was the eval...
Design methodologies for sustainable products from mixed waste plastics and fou...
Vieira, Daniel; Castro, Fernando; Carvalho, Helder; Providencia, BThis design research proposes, through cooperation between the private sector (industry) and the public sector (university), new furniture and cladding solutions to integrate the urban environment. It seeks to raise awareness on the reuse of industrial waste originating from mixed plastics and foundry sands, promoting collection, valorisation, and transformation. It potentiates sustainable advances that allow c...
Experimental Characterisation of Different Ecological Substrates for Use in Gre...
Coelho, Katya; Almeida, João; Castro, Fernando; Ribeiro, André; Teixeira, Tiago; Palha, Paulo; Simões, NunoGreen roofs are made up of several components, including those belonging to the waterproofing and drainage layers, substrate, and vegetation. Of these, the substrate is undoubtedly one of the most important layers of a green roof, contributing not only to the healthy growth of vegetation but also to the water retention capacity and thermal behaviour of the whole solution. Although green roofs are widely recogni...
D’ECO design economic circular opportunities
Gonçalves, Rui; Castro, Fernando; Providência, Francisco; Ferreira, João; Ribeiro, João Miguel Castro; Pinho, Adriano; Antunes, Susana; Teixeira, Tiago[Excerto] O Projeto D'ECO tem como objetivo principal a conceção e desenvolvimento de compósitos de plásticos mistos, com incorporação de resíduos plásticos e areias de fundição. Os resíduos de plásticos, com origem nos setores industrial e de construção, constituem, na atualidade, um problema societal e ambiental grave, sendo necessário procurar tecnologias que permitam a sua reutilização e reciclagem. Por out...
Characterization of stainless steel spent pickling sludge and prospects for its...
Castro, Fernando; Tavares, Pedro B.; Cristelo, Nuno; Teixeira, Tiago; Garcia, Joana F.; Parreira, Nuno Miguel GermanoFluorspar is considered a critical raw material for the European Union, due to its industrial uses and lack of sufficient extraction in European countries. It is a source for hydrofluoric acid manufacture, this latter chemical being employed, among other uses, in the pickling of stainless steels. From this latter activity, sludge is generated due to the need for used water treatment. In this article, we report ...
Caracterização física e mecânica de argamassas com incorporação de resíduos ind...
Cunha, Sandra Raquel Leite; Tavares, A.; Aguiar, J. L. Barroso de; Castro, FernandoA indústria da fundição produz milhões de toneladas de resíduos descartados em todo o mundo. Atualmente, o aumento dos custos e os problemas ambientais relacionados com a deposição de resíduos em aterros é um enorme problema. Assim, muitos estudos têm-se concentrado nas areias de fundição, contudo outros resíduos são gerados durante o processo de fundição e não se conhecem soluções de reutilização, tais como as...