Characteristics of fibres based on secondary raw materials and their use in concrete technology
Different types of fibres in cementitious composites, particularly in concrete, are currently used for a number of reasons. Fibres are being added to improve mechanical properties (especially steel and glass fibres), to increase the durability – to reduce occurrence of microcracks during the concre...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2024-05-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/9868 |
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| author | Martin Sedlmajer Jan Bubeník Jiří Zach Vítězslav Novák |
| author_facet | Martin Sedlmajer Jan Bubeník Jiří Zach Vítězslav Novák |
| author_sort | Martin Sedlmajer |
| collection | DOAJ |
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Different types of fibres in cementitious composites, particularly in concrete, are currently used for a number of reasons. Fibres are being added to improve mechanical properties (especially steel and glass fibres), to increase the durability – to reduce occurrence of microcracks during the concrete aging (mainly synthetic and cellulose fibres), or to increase the fire resistance (polypropylene fibres). Within the study, characterization of different types of alternative fibres (fibres generated during waste recycling that would otherwise end in incinerators or landfills) with possible use in cementitious composites. These were fibres from recycled PET bottles, paper, and mineral wool, whose properties were compared to the traditionally used cellulose and polypropylene fibres. In the experimental part, the thickness, length, shape, and surface of individual fibres were monitored by an optical microscope. Furthermore, the amount of heat of combustion was determined by the calorimetric method, and the differential thermal analysis (DTA) was carried out for determination of the impact of high temperature on monitored fibres. The microstructure of fibres was monitored using a scanning electron microscope. The focus of the experimental study was on fibres usable in concrete and capable of enduring high temperature stress.
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| format | Article |
| id | doaj-art-72dcc925f6d74dbc9fab2991a0e79315 |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-72dcc925f6d74dbc9fab2991a0e793152025-08-20T03:34:01ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822024-05-014710.14311/APP.2024.47.0121Characteristics of fibres based on secondary raw materials and their use in concrete technologyMartin Sedlmajer0Jan Bubeník1Jiří Zach2Vítězslav Novák3Brno University of Technology, Faculty of Civil Engineering, Institute of Technology of Building Materials and Components, Veveří 331/95, 602 00 Brno, Czech RepublicBrno University of Technology, Faculty of Civil Engineering, Institute of Technology of Building Materials and Components, Veveří 331/95, 602 00 Brno, Czech RepublicBrno University of Technology, Faculty of Civil Engineering, Institute of Technology of Building Materials and Components, Veveří 331/95, 602 00 Brno, Czech RepublicBrno University of Technology, Faculty of Civil Engineering, Institute of Technology of Building Materials and Components, Veveří 331/95, 602 00 Brno, Czech Republic Different types of fibres in cementitious composites, particularly in concrete, are currently used for a number of reasons. Fibres are being added to improve mechanical properties (especially steel and glass fibres), to increase the durability – to reduce occurrence of microcracks during the concrete aging (mainly synthetic and cellulose fibres), or to increase the fire resistance (polypropylene fibres). Within the study, characterization of different types of alternative fibres (fibres generated during waste recycling that would otherwise end in incinerators or landfills) with possible use in cementitious composites. These were fibres from recycled PET bottles, paper, and mineral wool, whose properties were compared to the traditionally used cellulose and polypropylene fibres. In the experimental part, the thickness, length, shape, and surface of individual fibres were monitored by an optical microscope. Furthermore, the amount of heat of combustion was determined by the calorimetric method, and the differential thermal analysis (DTA) was carried out for determination of the impact of high temperature on monitored fibres. The microstructure of fibres was monitored using a scanning electron microscope. The focus of the experimental study was on fibres usable in concrete and capable of enduring high temperature stress. https://ojs.cvut.cz/ojs/index.php/APP/article/view/9868fibre reinforcementwaste fibrestemperature resistance |
| spellingShingle | Martin Sedlmajer Jan Bubeník Jiří Zach Vítězslav Novák Characteristics of fibres based on secondary raw materials and their use in concrete technology Acta Polytechnica CTU Proceedings fibre reinforcement waste fibres temperature resistance |
| title | Characteristics of fibres based on secondary raw materials and their use in concrete technology |
| title_full | Characteristics of fibres based on secondary raw materials and their use in concrete technology |
| title_fullStr | Characteristics of fibres based on secondary raw materials and their use in concrete technology |
| title_full_unstemmed | Characteristics of fibres based on secondary raw materials and their use in concrete technology |
| title_short | Characteristics of fibres based on secondary raw materials and their use in concrete technology |
| title_sort | characteristics of fibres based on secondary raw materials and their use in concrete technology |
| topic | fibre reinforcement waste fibres temperature resistance |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/9868 |
| work_keys_str_mv | AT martinsedlmajer characteristicsoffibresbasedonsecondaryrawmaterialsandtheiruseinconcretetechnology AT janbubenik characteristicsoffibresbasedonsecondaryrawmaterialsandtheiruseinconcretetechnology AT jirizach characteristicsoffibresbasedonsecondaryrawmaterialsandtheiruseinconcretetechnology AT vitezslavnovak characteristicsoffibresbasedonsecondaryrawmaterialsandtheiruseinconcretetechnology |