5 documents found, page 1 of 1
Incorporation of sludge from the cutting of ornamental rocks in cementitious ma...
Moreira, O.; Malheiro, R.; Jesus, C.; Camões, A.; Ribeiro, M.J.O desenvolvimento mundial impulsiona a procura por cimento e os desafios ambientais associados à sua fabricação preocupam os investigadores. O setor de cimento é o terceiro maior consumidor industrial de energia e o segundo maior emissor de CO2. Neste sentido, algumas medidas têm sido implementadas. Para além da redução da relação clínquer/cimento, a redução do consumo de cimento através da utilização de Materi...
Incorporation of sludge from the cutting of ornamental rocks in cementitious ma...
Moreira, O.; Malheiro, R.; Jesus, C.; Camões, A.; Ribeiro, M.J.The development of the world drives the demand for cement and the environmental challenges associated with its manufacture concern researchers. The cement sector is the third largest industrial consumer of energy and the second largest emitter of CO2. In this sense, some measures have been implemented. In addition to reducing the clinker/cement ratio through use of composite cements, reducing cement consumption...
Thermal performance and comfort condition analysis in a vernacular building wit...
Fernandes, J. E. P.; Malheiro, R.; Castro, M. F.; Gervásio, H.; Silva, Sandra Monteiro; Mateus, RicardoThe increase in global environmental problems requires more environmentally efficient 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 ...
Behaviour of cementitious matrices subjected to the combined action of chloride...
Malheiro, R.; Camões, Aires; Meira, G.; Amorim, M. T.; Gomes, C. J. P.; Ferreira, R. M.Carbonation and chloride action are the two leading causes of degradation in reinforced concrete structures. Despite the combined action of these two mechanisms being a reality, there is little research on the effect of this combination in cementitious matrices. Furthermore, the incorporation of fly ash in cementitious matrices has been frequently used in order to make the matrix more resistant to the action of...
Methodology for analysis of the reactivity of coal fly ash using selective diss...
Reis, R. J. A. C.; Ribeiro, M.; Abrantes, J. C. C.; Camões, Aires; Teixeira, E. R.; Malheiro, R.The use of some additions as cement replacement has played an important role in the amount of clinker reduction. Due to its huge worldwide availability one of the most important and recognised replace agent is the fly ash, but is also estimated that only 30 to 40% of fly ash is used, although there are some challenges to be overcome, such as the reactive potential quantification. Chemical analysis is typically ...