6 documents found, page 1 of 1
WEEE glass as a sustainable supplementary cementitious material: experimental a...
Malheiro, Raphaele; Lemos, André; Camões, Aires; Ferreira, Duarte; Alves, Juliana; Quintelas, Cristina Maria CatalãoThis study investigates the use of waste glass powder derived from fluorescent lamps as a partial replacement for cement in mortar production, aiming to valorize this Waste from Electrical and Electronic Equipment (WEEE) and enhance sustainability in the construction sector. Mortars were formulated by substituting 25% of cement by volume with glass powders from fluorescent lamp glass and green bottle glass. The...
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...
Influence of chloride contamination on carbonation of cement-based materials
Malheiro, Raphaele; Camões, Aires; Meira, Gibson; Amorim, M. T. Pessoa deAn experimental investigation was conducted to understand the effect of the presence of chloride on the carbonation front. Microstructural analysis was conducted to verify the carbonation development in material previously contaminated by chlorides. Accelerated tests were combined to understand how the presence of chlorides influences carbonation front and how chloride test method influences in these results. T...
Thermal Performance and Comfort Condition Analysis in a Vernacular Building wit...
Fernandes, Jorge; Malheiro, Raphaele; Castro, Maria de Fátima; Gervásio, Helena; Silva, Sandra Monteiro; Mateus, RicardoThe increase in global environmental problems requires more environmentally e cient construction. Vernacular passive strategies can play an important role in helping reducing energy use and CO2 emissions related to buildings. This paper studies the use of glazed balconies in the North of Portugal as a strategy to capture solar gains and reduce heat losses. The purpose is understanding thermal performance and co...
Effect of embodied energy on cost-effectiveness of a prefabricated modular solu...
Almeida, Manuela Guedes de; Barbosa, Ricardo; Malheiro, RaphaeleA large-scale energy renovation intervention in existing buildings has been consistently presented as the most significant opportunity to contribute to achieving the European targets for 2030 and 2050. One of the key points for such achievement is the cost-effectiveness of the interventions proposed, which is also closely related to decent housing affordability. Prefabricated modular solutions have been pointed...
Influência da carbonatação no transporte de cloretos em argamassas submetidas à...
Malheiro, Raphaele; Camões, Aires; Meira, Gibson; Ferreira, Rui Miguel; Amorim, M. T. Pessoa de; Reis, RuiPara assegurar a sustentabilidade das estruturas de betão armado é fundamental garantir a sua durabilidade. Neste contexto, conhecer o modo como estas estruturas reagem à ação dos agentes agressores assume grande importância. A corrosão dos varões de aço é o problema que mais afeta a durabilidade sendo que, a carbonatação e o ingresso de cloretos são as duas principais causas da corrosão. Apesar da ação combina...