Mestrado em Engenharia Civil

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http://repositorio.ufes.br/handle/10/17614

Nível: Mestrado Acadêmico
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Navegando Mestrado em Engenharia Civil por Assunto "Aço - Dessulfuração - Escória"

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    Avaliação de desempenho mecânico e microestrutural da brita graduada tratada com cimento com incorporação de coproduto de aciaria KR
    (Universidade Federal do Espírito Santo, 2018-04-16) Andrade, Carlos Magno Sossai; Pires, Patrício José Moreira; Vieira, Geilma Lima; Gomes, Guilherme José Cunha; Moreira, Ricardo Filipe Teixeira
    Brazil is a country where freight transport is mostly concentrated on highways, but despite its importance, most of the federal highway is not paved. This deficiency has several roots, one of which is the cost of construction and maintenance using natural aggregates. This work combines the need of using available materials, taking into account their mechanical and microstructural characteristics. The steel industry started to generate a by-product known as Kambara Reactor slag (KR slag), which is produced in the process of desulphurisation of liquid pig iron. The use of this material for the purposes of paving has environmental gains, both to give a suitable destination to the material, and to reduce the need for extraction and processing of natural aggregates. This work evaluates the incorporation of KR slag in the proportions of 10, 20, 30 and 40% in Cement Treated Crushed Rock (CTCR), a material widely used in Brazil for the base layers of pavements. For this, an experimental program was developed to determine the mechanical characteristics by compression test and resilient modulus, mineralogical characteristics by X-ray diffraction test and microstructural characteristics of this new material with scanning electron microscopy. It was verified that the material with incorporation of KR slag has recommended characteristics for application in road base, presenting results of resilient modulus superior to the one of the standard CTCR, parameter of fundamental importance in the design of pavements.