Technical and environmental evaluation of metallurgical slags as aggregate for sustainable pavement layer applications

Gökalp, İslam; Uz, Volkan Emre; Saltan, Mehmet; Tutumluer, Erol

doi:10.1016/j.trgeo.2017.10.003

Cited by 52 publications

(23 citation statements)

References 52 publications

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“…It has been used in various applications, mainly in aggressive environments (maritime and hydraulic facilities) because of its resistance against salt water and sulphates. Since the 80s, much research [ 14 , 15 , 16 , 17 , 18 , 19 ] has been conducted in order to use this type of slag as an additive or as fine and coarse aggregate substitutes [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Concrete Properties Comparison When Substituting a 25% Cement with Slag from Different Provenances

et al. 2018

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Concrete consumption greatly exceeds the use of any other material in engineering. This is due to its good properties as a construction material and the availability of its components. Nevertheless, the present worldwide construction increases and the high-energy consumption for cement production means a high environmental impact. On the other hand, one of the main problems in the iron and steel industry is waste generation and byproducts that must be properly processed or reused to promote environmental sustainability. One of these byproducts is steel slag. The cement substitution with slag strategy achieves two goals: raw materials consumption reduction and waste management. In the present work, four different concrete mixtures are evaluated. The 25% cement substitution is carried out with different types of slag. Tests were made to evaluate the advantages and drawbacks of each mixture. Depending on the origin, characteristics, and treatment of the slag, the concrete properties changed. Certain mixtures provided proper concrete properties. Stainless steel slag produced a fluent mortar that reduced water consumption with a slight mechanical strength loss. Mixtures with ground granulated blast furnace slag properties are better than the reference concrete (without slag).

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Section: Introductionmentioning

confidence: 99%

Concrete Properties Comparison When Substituting a 25% Cement with Slag from Different Provenances

et al. 2018

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“…Conjuntamente, unem-se os benefícios ambientais e econômicos, como a conservação dos recursos naturais e a economia de energia (ULUBEYLI; ARTIR, 2015). Conforme Gökalp et al (2018), escórias, em geral, também vêm sendo aplicadas em camadas de base e sub-base de pavimentos, por conta do elevado ângulo de fricção e características de autocimentação. Ladomerský et al (2016) estudaram a aplicação de escória de fundição de ferro como substituta parcial de agregados naturais em concreto.…”

Section: Escória De Fundiçãounclassified

Caracterização de resíduos da fundição de ferro e avaliação de possíveis aplicações na construção civil

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Ferrazzo

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et al. 2018

Rev. Bras. Ciênc. Ambient. (Online)

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A geração e a disposição de resíduos oriundos da fundição de metais despertam a necessidade de alternativas que promovam seu melhor reaproveitamento em processos produtivos. Assim, este estudo realizou a caracterização química, mineralógica e granulométrica de resíduos de fundição de ferro cinzento e nodular e avaliou sua aplicabilidade na construção civil. A areia verde, escória e material particulado apresentaram em sua composição química a presença majoritária de dióxido de silício (SiO 2), além de óxido de alumínio (Al 2 O 3), óxido de potássio (K 2 O) e óxido de ferro (Fe 2 O 3). A análise mineralógica revelou a presença de quartzo em todos os resíduos e de hematita, na escória. Os três resíduos apresentaram granulometrias compreendidas entre 0,002 e 0,6 mm. Identificou-se que os resíduos possuem potencialidade de uso na produção de cimento, argamassas e materiais cerâmicos, como substituintes parciais dos agregados miúdos do concreto e como material da camada de sub-base de pavimentos. Palavras-chave: produção de peças fundidas; subprodutos; composição química e mineralógica; reaproveitamento; cerâmica e concreto.

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“…The properties of the slag produced during steel making depends on many factors, mainly the manufacturing process. According to Setie et al [2], four types of steel slag can be distinguished: electric arc furnace (EAF) slag, blast furnace slag (GGBS), basic oxygen furnace slag (BOFS), and ladle furnace slag (LFS) [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Study of the Suitability of Different Types of Slag and Its Influence on the Quality of Green Grouts Obtained by Partial Replacement of Cement

et al. 2019

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This paper is part of a research line focused on the reduction of the use of cement in the industry. In this work, the study of work methodologies for the manufacture of green cementitious grout mixtures is studied. Grout is widely used in construction and it requires an important use of raw materials. On the other hand, the steel industry faces the problem of the growing generation of slag wastes due to the increase in steel manufacturing. The green grout aims to achieve the dual objective of reducing the demand for cement and improve the slag waste valorization. Slag is not introduced as an aggregate but through the direct replacement of cement and no additives. The research seeks a product where we can use steel slag intensively, guaranteeing minimum resistance and workability. Results with substitutions between a 25% to 50% and water/cement ratio of 1 are presented. In particular, the suitability of different slags (two Ladle Furnace Slag (LFS) and one Blast Furnace Slag (GGBS)) in the quality of the final product are analyzed. The feasibility of replacing cement with slag and the importance of the origin and pretreatment are highlighted.

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Technical and environmental evaluation of metallurgical slags as aggregate for sustainable pavement layer applications

Cited by 52 publications

References 52 publications

Concrete Properties Comparison When Substituting a 25% Cement with Slag from Different Provenances

Concrete Properties Comparison When Substituting a 25% Cement with Slag from Different Provenances

Caracterização de resíduos da fundição de ferro e avaliação de possíveis aplicações na construção civil

Study of the Suitability of Different Types of Slag and Its Influence on the Quality of Green Grouts Obtained by Partial Replacement of Cement

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