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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of coarse recycled aggregate with embedded fibres on the mechanical properties and microstructure of polypropylene fibre-reinforced concrete
https://orcid.org/http://orcid.org/0000-0003-0242-8804
Previous studies have shown the feasibility of using recycled aggregates in new concrete production. However, the recycling of fibre-reinforced concrete (FRC) introduces a novel challenge: the emergence of a new aggregate type that can be identified as recycled aggregate with embedded fibres. Therefore, in this study, in order to investigate the differences, the mechanical properties and microstructures of polypropylene fibre-reinforced concrete (PPFRC) made of natural coarse aggregate, coarse recycled aggregate and coarse recycled aggregate with embedded fibres were compared. Polypropylene fibre contents of 3 and 9 kg/m3 (0.33% and 1.0% by volume, respectively) were chosen for all concretes. The mechanical properties, including stress–strain behaviour in compression and flexural behavior, were tested. Scanning electron microscopy (SEM) was used to examine the microstructure and elucidate the effects of different aggregates on PPFRC properties. The results indicated that recycled aggregate with embedded fibres did not enhance compressive strength and elastic modulus compared to recycled aggregate without fibres. However, when the fibre content is low, its contribution to flexural behavior is significant, even surpassing that of PPFRC made with natural aggregate.
Effect of coarse recycled aggregate with embedded fibres on the mechanical properties and microstructure of polypropylene fibre-reinforced concrete
https://orcid.org/http://orcid.org/0000-0003-0242-8804
Previous studies have shown the feasibility of using recycled aggregates in new concrete production. However, the recycling of fibre-reinforced concrete (FRC) introduces a novel challenge: the emergence of a new aggregate type that can be identified as recycled aggregate with embedded fibres. Therefore, in this study, in order to investigate the differences, the mechanical properties and microstructures of polypropylene fibre-reinforced concrete (PPFRC) made of natural coarse aggregate, coarse recycled aggregate and coarse recycled aggregate with embedded fibres were compared. Polypropylene fibre contents of 3 and 9 kg/m3 (0.33% and 1.0% by volume, respectively) were chosen for all concretes. The mechanical properties, including stress–strain behaviour in compression and flexural behavior, were tested. Scanning electron microscopy (SEM) was used to examine the microstructure and elucidate the effects of different aggregates on PPFRC properties. The results indicated that recycled aggregate with embedded fibres did not enhance compressive strength and elastic modulus compared to recycled aggregate without fibres. However, when the fibre content is low, its contribution to flexural behavior is significant, even surpassing that of PPFRC made with natural aggregate.
Effect of coarse recycled aggregate with embedded fibres on the mechanical properties and microstructure of polypropylene fibre-reinforced concrete
https://orcid.org/http://orcid.org/0000-0003-0242-8804
Previous studies have shown the feasibility of using recycled aggregates in new concrete production. However, the recycling of fibre-reinforced concrete (FRC) introduces a novel challenge: the emergence of a new aggregate type that can be identified as recycled aggregate with embedded fibres. Therefore, in this study, in order to investigate the differences, the mechanical properties and microstructures of polypropylene fibre-reinforced concrete (PPFRC) made of natural coarse aggregate, coarse recycled aggregate and coarse recycled aggregate with embedded fibres were compared. Polypropylene fibre contents of 3 and 9 kg/m3 (0.33% and 1.0% by volume, respectively) were chosen for all concretes. The mechanical properties, including stress–strain behaviour in compression and flexural behavior, were tested. Scanning electron microscopy (SEM) was used to examine the microstructure and elucidate the effects of different aggregates on PPFRC properties. The results indicated that recycled aggregate with embedded fibres did not enhance compressive strength and elastic modulus compared to recycled aggregate without fibres. However, when the fibre content is low, its contribution to flexural behavior is significant, even surpassing that of PPFRC made with natural aggregate.
Effect of coarse recycled aggregate with embedded fibres on the mechanical properties and microstructure of polypropylene fibre-reinforced concrete
Mater Struct
Liu, Guanzhi (Autor:in) / Claramunt, Josep (Autor:in) / Hunger, Martin (Autor:in) / Tošić, Nikola (Autor:in) / de la Fuente, Albert (Autor:in)
01.12.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Recycled aggregate with embedded fibre , PPFRC , Stress–strain behaviour , Flexural behaviour , Mircostructure Engineering , Civil Engineering , Materials Engineering , Solid Mechanics , Materials Science, general , Theoretical and Applied Mechanics , Manufacturing, Machines, Tools, Processes , Building Materials
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