MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE
Fiber reinforced concrete mechanical properties are limited due to low adhesion between polymer fibers and cement matrix. To ensure a strong interaction between the two materials, polypropylene fibers (d = 0.305mm) were modified by an oxygen plasma treatment. The interface interaction was moreover a...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2019-07-01
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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/5670 |
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| author | Jan Trejbal Václav Nežerka Radim Hlůžek Zdeněk Prošek |
| author_facet | Jan Trejbal Václav Nežerka Radim Hlůžek Zdeněk Prošek |
| author_sort | Jan Trejbal |
| collection | DOAJ |
| description | Fiber reinforced concrete mechanical properties are limited due to low adhesion between polymer fibers and cement matrix. To ensure a strong interaction between the two materials, polypropylene fibers (d = 0.305mm) were modified by an oxygen plasma treatment. The interface interaction was moreover activated using finely ground concrete recyclate, whose individual grains (1−64 μm) ensure an adhesion improvement in interfacial zones. The adhesion enhancement was verified by pull-out tests, when reference and modified fibers were pulled-out from cement matrix specimens. Such obtained results were used as a crucial parameter to numerical simulations of bending tests of specimens (550 × 150 × 150mm) with properties following fiber reinforced concrete. It was shown that samples reinforced with modified fibers and contained activating recyclate reached on higher residual bending strength then those with reference fibers. |
| format | Article |
| id | doaj-art-58daaefe97cb484e896ec9097e6c0f74 |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2019-07-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-58daaefe97cb484e896ec9097e6c0f742025-08-20T03:34:33ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822019-07-0122012312710.14311/APP.2019.22.01234578MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETEJan TrejbalVáclav NežerkaRadim HlůžekZdeněk ProšekFiber reinforced concrete mechanical properties are limited due to low adhesion between polymer fibers and cement matrix. To ensure a strong interaction between the two materials, polypropylene fibers (d = 0.305mm) were modified by an oxygen plasma treatment. The interface interaction was moreover activated using finely ground concrete recyclate, whose individual grains (1−64 μm) ensure an adhesion improvement in interfacial zones. The adhesion enhancement was verified by pull-out tests, when reference and modified fibers were pulled-out from cement matrix specimens. Such obtained results were used as a crucial parameter to numerical simulations of bending tests of specimens (550 × 150 × 150mm) with properties following fiber reinforced concrete. It was shown that samples reinforced with modified fibers and contained activating recyclate reached on higher residual bending strength then those with reference fibers.https://ojs.cvut.cz/ojs/index.php/APP/article/view/5670fiber reinforced concrete, macro fibers, polymer fibers, interfacial shear stress |
| spellingShingle | Jan Trejbal Václav Nežerka Radim Hlůžek Zdeněk Prošek MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE Acta Polytechnica CTU Proceedings fiber reinforced concrete, macro fibers, polymer fibers, interfacial shear stress |
| title | MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE |
| title_full | MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE |
| title_fullStr | MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE |
| title_full_unstemmed | MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE |
| title_short | MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE |
| title_sort | mechanical properties improvement of fiber reinforced concrete |
| topic | fiber reinforced concrete, macro fibers, polymer fibers, interfacial shear stress |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/5670 |
| work_keys_str_mv | AT jantrejbal mechanicalpropertiesimprovementoffiberreinforcedconcrete AT vaclavnezerka mechanicalpropertiesimprovementoffiberreinforcedconcrete AT radimhluzek mechanicalpropertiesimprovementoffiberreinforcedconcrete AT zdenekprosek mechanicalpropertiesimprovementoffiberreinforcedconcrete |