Fatigue resistance and cracking mechanism of concrete pavements reinforced with recycled steel fibres recovered from post-consumer tyres

Graeff, Ângela Gaio; Pilakoutas, Kypros; Neocleous, Kyriacos; Peres, Maria Vania N.N.

doi:10.1016/j.engstruct.2012.06.030

Cited by 200 publications

(111 citation statements)

References 16 publications

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“…Previous research in this field mainly consisted in the study of fibre reinforced concrete properties and focused exclusively on recycled steel fibres, and comparison with steel fibre reinforced concrete containing industrial steel fibres (Achilleos et al 2011;Aiello et al 2009;Graeff et al 2009;Neocleous et al 2006;Tlemat et al 2004). Recent studies (Graeff et al 2012) on fatigue resistance of concrete pavements reinforced with recycled steel fibres suggests that for enhanced fatigue performance a combination of recycled and industrially produced fibres would be ideal. Possible synergy of recycled and industrial steel fibres has until now been briefly investigated in few papers only Bjegovic et al 2012a, b, c;Krolo et al 2012).…”

Section: Application Of Recycled Steel Fibres In Concrete Technologymentioning

confidence: 99%

Positive Interaction of Industrial and Recycled Steel Fibres in Fibre Reinforced Concrete

Bjegović

Baričević

Lakušić

et al. 2014

Journal of Civil Engineering and Management

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Abstract. In line with current "green" transport initiatives, Croatia plans to build over the next investment period a high speed railway line which will connect central Croatia and its capital with coastal regions of the country. According to design documents, the track system will be built using ballastless concrete solutions. In the scope of the project "Concrete track system -ECOTRACK", researchers from the University of Zagreb -Faculty of Civil Engineering analysed a new material, i.e. the rubberized hybrid fibre reinforced concrete (RHFRC), in order to find out whether its properties are adequate for the proposed concrete track system. The RHFRC contains by-products from mechanical recycling of waste tyres (rubber and steel fibres). The study of fibre and rubber interaction and their contribution to mechanical properties of the fibre reinforced concrete is presented, as extensive research on positive interaction between industrial and recycled steel fibres has not as yet been made. The results show that the RHFRC is an innovative, sustainable and cost-effective concrete, which is fully compliant with criteria prescribed in relevant standards.Keywords: fibre reinforced concrete, industrial steel fibres, recycled steel fibres, mechanical properties, recycled rubber, waste tyre.

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Section: Application Of Recycled Steel Fibres In Concrete Technologymentioning

confidence: 99%

Positive Interaction of Industrial and Recycled Steel Fibres in Fibre Reinforced Concrete

Bjegović

Baričević

Lakušić

et al. 2014

Journal of Civil Engineering and Management

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“…Entretanto, as pesquisas mostram grande dispersão de resultados nos números de ciclos quando é realizado o ensaios de fadiga As pesquisas de Cervo [14]; Graeff [18]; Qian et al [25] também mostraram grande dispersão dos resultados para o ensaio de fadiga. Na Tabela 4, pode-se observar resultados de Cervo [14], para o concreto convencional saturado e ensaiado com frequência de 10Hz.…”

Section: Figura 8: Resultados Do Ensaio De Fadigaunclassified

“…A Figura 10 apresenta os resultados dos ensaios de fadiga de Graeff et al [18], onde o número de ciclos é apresentado em forma de logaritmo em função das relações de tensão. A frequência usada por Graeff et al [18] foi de 15 Hz.…”

Section: Figura 8: Resultados Do Ensaio De Fadigaunclassified

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Estudo do comportamento mecânico do concreto com borracha de pneu

et al. 2016

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RESUMOEste estudo trata da análise das propriedades mecânicas do concreto, elaborado a partir da substituição de parte do agregado miúdo por borracha de pneu triturado. Foram realizados testes experimentais em corpos de prova submetidos à compressão axial, flexão simples sob carga centrada e fadiga. As medições foram feitas em três traços de concreto: 1) concreto sem borracha (denominado na presente pesquisa por concreto de referência); 2) concreto com borracha e consumo de cimento igual ao de referência; e 3) concreto com borracha e acréscimo de cimento até a obtenção da resistência do concreto de referência. Os resultados obtidos mostram que a adição de borracha provoca redução na resistência mecânica do concreto, o que pode reduzir as aplicações deste novo material. A presença da borracha também conferiu um menor módulo de elasticidade ao concreto, o que pode ser desejável em situações envolvendo ações de impacto, forças dinâmicas e fadiga. Além dessa vantagem, a aplicação da borracha de pneu no concreto contribui na reciclagem de um material poluente e que normalmente é descartado no meio ambiente. Palavras-chave: concreto; borracha de pneu; propriedades mecânicas. ABSTRACTThis study discusses the mechanical properties of concrete, elaborated from the partial replacement of fine aggregate by crushed rubber. It was made experimental tests in specimens submitted to axial compression, Young's modulus (stiffness), three-point bending flexural and fatigue. The measurements were performed on three mixtures: 1) concrete without rubber (denominated as reference concrete), 2) concrete with rubber and the consumption of cement equal of reference and 3) concrete with rubber and the addition of cement on the mixture until it obtains the same strength of the reference concrete. The results have indicated that adding rubber in concrete decreases the strength, which could reduce the application of this new material. The rubber also decreased the elastic modulus; this could improve the behavior of materials in situations involving impact actions, dynamics loads and fatigue. Furthermore, this new composite contributes on rubber tire recycling processes.

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“…concrete containing waste steel fibers may be improved due to the crack-bridging effect of the fibers in concrete similar to the concretes produced with commercial fibers [8], [5] and [9].…”

Section: Cmss-2017mentioning

confidence: 99%

Blast Resistance of Slurry Infiltrated Fibre Concrete with Waste Steel Fibres from Tires

et al. 2018

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Abstract. The utilization of waste steel fibres (coming from the recycling process of the old tires) in production of blast resistant cement based panels was assessed. Waste fibres were incorporated in slurry infiltrated fibre concrete (SIFCON), which is a special type of ultra-highperformance fibre reinforced concrete with high fibre content. The technological feasibility (i.e. suitability of the waste fibres for SIFCON technology) was assessed using homogeneity test. Test specimens were prepared with three volume fractions (5; 7.5 and 10 % by vol.) of waste unclassified fibres. SIFCON with industrial steel fibres (10% by vol.) and ultra-highperformance fibre concrete with industrial fibres were also cast and tested for comparison purposes. Quasi-static mechanical properties were determined. Real blast tests were performed on the slab specimens (500x500x40 mm) according to the modified methodology M-T0-VTU0 10/09. Damage of the slab, the change of the ultrasound wave velocity propagation in the slab specimen before and after the blast load in certain measurement points, the weight of fragments and their damage potential were evaluated and compared. Realized tests confirmed the possibility of using the waste fibres for SIFCON technology. The obtained results indicate, that the usage of waste fibres does not significantly reduce the values of SIFCON flexural and compressive strength at quasi-static load -the values were comparable to the specimens with industrially produced fibres. With increasing fibre content, the mechanical parameters are increasing as well. Using of the waste fibres reduces fragmentation of SIFCON at blast load due to the fibre size parameters. Using of low diameter fibres means more fibres in the matrix and thus better homogeneity of the whole composite with less unreinforced areas. Regarding the blast tests, the specimen with waste steel fibres showed the best resistance and outperformed also the specimen with commercial fibres. Using of waste fibres in SIFCON technology can reduce the price of this composite by 70 % by keeping the original SIFCON extraordinary properties, which makes it very competitive material in the concrete area.

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Fatigue resistance and cracking mechanism of concrete pavements reinforced with recycled steel fibres recovered from post-consumer tyres

Cited by 200 publications

References 16 publications

Positive Interaction of Industrial and Recycled Steel Fibres in Fibre Reinforced Concrete

Positive Interaction of Industrial and Recycled Steel Fibres in Fibre Reinforced Concrete

Estudo do comportamento mecânico do concreto com borracha de pneu

Blast Resistance of Slurry Infiltrated Fibre Concrete with Waste Steel Fibres from Tires

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