A study on the durability of structural concrete incorporating electric steelmaking slags

Santamarı́a, Anton; Orbe, Aimar; José, J. T. San; González, J.

doi:10.1016/j.conbuildmat.2017.11.121

Cited by 75 publications

(39 citation statements)

References 70 publications

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“…Therefore, they were exposed to tidal movements twice a day, being soaked for 12 h every day and being in contact with the atmosphere over the remaining time, and undergoing two wetting-drying cycles each day. As a conclusion of that work [85], an advantageous resistance to steel rebar corrosion of the concretes incorporating electric arc furnace aggregates in the studied marine environment has been pointed out, according to the electrochemical corrosion tests performed.…”

Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

“…In this way, another type of slag, such as electric arc-furnace slag (EAFS), has been used as aggregate for concrete in the construction of coastal defences against storms, as well as in the breakwater structures in a marine environment [85]. In this regard, Santamaría et al [85] have studied the durability of structural concrete mixes prepared with electric steelmaking aggregates. In this research [85], the samples were exposed to the marine environment suspending them in cages, at level zero ("central level" of the intertidal zone) of the Pasaia Donibane port (Spain) up to five years.…”

Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

“…In this regard, Santamaría et al [85] have studied the durability of structural concrete mixes prepared with electric steelmaking aggregates. In this research [85], the samples were exposed to the marine environment suspending them in cages, at level zero ("central level" of the intertidal zone) of the Pasaia Donibane port (Spain) up to five years. Therefore, they were exposed to tidal movements twice a day, being soaked for 12 h every day and being in contact with the atmosphere over the remaining time, and undergoing two wetting-drying cycles each day.…”

Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

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From Julius Caesar to Sustainable Composite Materials: A Passage through Port Caisson Technology

et al. 2018

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Abstract:The breakwater construction technique using floating concrete caissons is well-known nowadays as a widespread system. Yet do we really know its origin? Since Julius Caesar used this technology in Brindisi (Italy) up to the Normandy landings in June 1944, not only has this technology been developed, but it has been a key item in several moments in history. Its development has almost always been driven by military requirements. The greatest changes have not been conceptual but point occurring, backed by the materials used. Parallelisms can be clearly seen in each new stage: timber, opus caementitium (Roman concrete), iron and concrete . . . However, nowadays, achieving a more sustainable world constitutes a major challenge, to which the construction of caissons breakwaters must contribute as a field of application of new eco-friendly materials. This research work provides a general overview from the origins of caissons until our time. It will make better known the changes that took place in the system and their adaptation to new materials, and will help in clarifying the future in developing technology towards composite sustainable materials and special concrete. If we understand the past, it will be easier to define the future.

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Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

Section: Present and Future Of Caisson Breakwaters Technology: An Impmentioning

confidence: 99%

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From Julius Caesar to Sustainable Composite Materials: A Passage through Port Caisson Technology

et al. 2018

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“…Estruturas de concreto são frequentemente expostas em ambientes e condições agressivas. Nessas situações, estão submetidas à inúmeras adversidades, passando pela ação de baixas e altas temperaturas, umidade relativa do ar, vento, entre outras [1,2]. As condições apresentadas variam com a localidade da estrutura e com a estação do ano, tendo como condições extremas o inverno e verão [3,4].…”

Section: Introductionunclassified

Impacto nas propriedades mecânicas do concreto curado sob baixas temperaturas

et al. 2019

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RESUMO O processo de cura das matrizes cimentícias é muito importante na determinação das suas propriedades no estado endurecido. Nessas circunstâncias, o concreto pode sofrer sérias avarias quando exposto às severas variações térmicas. As baixas temperaturas de cura em que as matrizes cimentícias são expostas podem influenciar nas propriedades no estado endurecido, principalmente nas idades iniciais, prejudicando os processos de desfôrma e escoramento. Locais de frio intenso devem seguir procedimentos específicos de dosagem e aplicação de uma matriz cimentícia. Sendo assim, essa pesquisa objetivou analisar a influência da temperatura de cura no comportamento mecânico e físico de concretos em diversas temperaturas de cura, tanto nas idades inicias como nas mais avançadas. Observou-se que a diminuição na temperatura de cura proporcionou aumento de resistência em até 26% na idade de 28 dias nos concretos analisados, apesar de que apresentaram desenvolvimento lento das propriedades mecânicas nos 7 dias iniciais. Concretos com maior consumo de cimento apresentaram melhor desempenho nas idades inicias quando submetidos às temperaturas menores que 3 oC. Porém, percebeu-se que a cura em baixas temperaturas é capaz de proporcionar misturas mais íntegras em idades avançadas, visto que atingiram maior velocidade de propagação onda ultrassônica e resistência, pelo fato de ocorrer a hidratação residual do cimento.

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Mechanical and conductive performance of electrically conductive cementitious composite using graphite, steel slag, and GGBS

Qin

Sun

et al. 2020

Structural Concrete

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Electrically conductive cementitious composite (ECCC) can be utilized in traffic detection, structural health monitoring (SHM), and pavement deicing. Graphite is a popular conductive filler given its outstanding electrical resistance behavior, but its flat micro‐surface decreases the friction resistance, reducing mechanical strength. However, slag solids can substitute part of the graphite with their considerable conductivity and superior mechanical characteristics. In this research, 27 ECCC composites are developed incorporated by combined graphite powder (GP), blast furnace slag (GGBS), and steel slag (SS). Flexural, unconfined compressive strength (UCS) experiments, and resistance experiments with failure mode evaluations are carried out to explore the influence of proposed conductive fillers with different fractions. Results show the graphite strongly improves conductivity but dramatically reduces mechanical performance. Both steel slag and GGBS reduced the compressive and flexural strength after their replacement ratio exceeded 20%. Additionally, compared with GGBS, SS demonstrated a better influence on mechanical and conductive performance. A 15 wt% ratio of GGBS, 20 wt% of SS, and 4 wt% of GP are explored as the optimum design with 3.4 MPa of flexural strength, 36 MPa of compressive strength, and 7,779 Ω cm of resistance. Lastly, a microstructural investigation is conducted to explore the mechanical and conductive mechanism of ECCC.

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A study on the durability of structural concrete incorporating electric steelmaking slags

Cited by 75 publications

References 70 publications

From Julius Caesar to Sustainable Composite Materials: A Passage through Port Caisson Technology

From Julius Caesar to Sustainable Composite Materials: A Passage through Port Caisson Technology

Impacto nas propriedades mecânicas do concreto curado sob baixas temperaturas

Mechanical and conductive performance of electrically conductive cementitious composite using graphite, steel slag, and GGBS

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