Avaliação de desempenho mecânico e microestrutural da brita graduada tratada com cimento com incorporação de coproduto de aciaria KR

• Ano de defesa: 2018
• Autor(a) principal: Andrade, Carlos Magno Sossai
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Civil; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Civil
• Palavras-chave em Português: Composite materials; Cement treated crushed rock (CTCR); Stell by-products; Materiais compostos; Brita graduada tratada com cimento (BGTC); Coproduto de aciaria; Rodovias - Pavimentos; Aço - Dessulfuração - Escória; Engenharia Civil; 624
• Link de acesso: http://repositorio.ufes.br/handle/10/9512

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.