EM - Escola de Minas
URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/6
Notícias
A Escola de Minas de Ouro Preto foi fundada pelo cientista Claude Henri Gorceix e inaugurada em 12 de outubro de 1876.
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2 resultados
Resultados da Pesquisa
Item Steel slags in cement-based composites : an ultimate review on characterization, applications and performance.(2021) Martins, Ana Carolina Pereira; Carvalho, José Maria Franco de; Costa, Laís Cristina Barbosa; Andrade, Humberto Dias; Melo, Tainá Varela de; Ribeiro, José Carlos Lopes; Pedroti, Leonardo Gonçalves; Peixoto, Ricardo André FiorottiSteel slags are by-products generated in high volumes in the steel industry. Their main constituents are calcium, silicon, ferric, aluminum, and magnesium oxides. Larnite, alite, brownmillerite, and ferrite are also found. The presence of expansive compounds cause concern when used in cement-based compos- ites; however, mitigating routes have been proposed. Activation techniques improve the binding proper- ties of steel slag powder, potentiating its use as a supplementary cementitious material (SCM). As an aggregate, steel slag presents good morphological and mechanical properties. Promising mechanical and durability performances in cement-based composites encourage further research to promote the use of steel slag.Item More eco-efficient concrete : an approach on optimization in the production and use of waste-based supplementary cementing materials.(2019) Carvalho, José Maria Franco de; Melo, Tainá Varela de; Fontes, Wanna Carvalho; Batista, Júnio Oliveira dos Santos; Silva, Guilherme Jorge Brigolini; Peixoto, Ricardo André FiorottiThis paper presents a study that includes increase in clinker replacement and waste consumption in cement-based composites. Techniques for performance optimization of waste-based supplementary cementing materials in densely packed matrices using basic oxygen furnace slag, iron ore tailings from a tailings dam, quartz mining tailings and quartzite mining tailings were evaluated. Powders with different particle size ranges were produced and characterized. A highly-packed sand-concrete reference mix was designed and six different mixtures with 10−60 vol% partial cement replacement were evaluated. The high binder efficiencies observed and physical-mechanical performances evidence the effectiveness of the proposal, expanding the concept of low-cost supplementary cementing materials and broadening the range of residual materials suitable for use in cement-based composites.