Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive Environment
The paper presents a numerical calculation of the service life of concrete structures considering the effect of chlorides in the case of the material properties of structural lightweight waste aggregate concrete. Different amounts of fibres (0.0%, 1.0%, and 1.5%) and different values of compressive...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/11/10/489 |
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| author | Petr Lehner Marie Horňáková |
| author_facet | Petr Lehner Marie Horňáková |
| author_sort | Petr Lehner |
| collection | DOAJ |
| description | The paper presents a numerical calculation of the service life of concrete structures considering the effect of chlorides in the case of the material properties of structural lightweight waste aggregate concrete. Different amounts of fibres (0.0%, 1.0%, and 1.5%) and different values of compressive preloading (0%, 50%, and 100% of the ultimate strength capacity-USC) were considered. The subject of the research was the comparison of the influence of the constant diffusion coefficient and the time-dependent diffusion coefficient regarding the service life of the selected structure. Nine groups of material characteristics in combination with two numerical models are compared. A time-dependent diffusion coefficient and maturation coefficient, which were determined based on long-term monitoring (up to 461 days), were accepted for the numerical modelling. Thanks to time-dependent parameters, it is possible to observe the results of the theoretical service life of the structure and the influence of the mentioned factors. The analysed structure can be considered as the upper layer of an industrial floor in a chemical plant. It is important to determine the theoretical service life at which the structure shall be inspected or replaced. The results, in general, show that a higher amount of fibres reduces the service life as well as the preloading of the structure. An exception was a mixture with 1% of fibre loaded to 50% USC, which shows a lower diffusion coefficient than the specimens without preloading. |
| first_indexed | 2024-03-10T06:41:58Z |
| format | Article |
| id | doaj.art-f64338008e5c41d7a67db49326b6d53c |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T06:41:58Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-f64338008e5c41d7a67db49326b6d53c2023-11-22T17:39:10ZengMDPI AGBuildings2075-53092021-10-01111048910.3390/buildings11100489Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive EnvironmentPetr Lehner0Marie Horňáková1Faculty of Civil Engineering, VSB—Technical University of Ostrava, L. Podéště 1875, 70800 Ostrava-Poruba, Czech RepublicFaculty of Civil Engineering, VSB—Technical University of Ostrava, L. Podéště 1875, 70800 Ostrava-Poruba, Czech RepublicThe paper presents a numerical calculation of the service life of concrete structures considering the effect of chlorides in the case of the material properties of structural lightweight waste aggregate concrete. Different amounts of fibres (0.0%, 1.0%, and 1.5%) and different values of compressive preloading (0%, 50%, and 100% of the ultimate strength capacity-USC) were considered. The subject of the research was the comparison of the influence of the constant diffusion coefficient and the time-dependent diffusion coefficient regarding the service life of the selected structure. Nine groups of material characteristics in combination with two numerical models are compared. A time-dependent diffusion coefficient and maturation coefficient, which were determined based on long-term monitoring (up to 461 days), were accepted for the numerical modelling. Thanks to time-dependent parameters, it is possible to observe the results of the theoretical service life of the structure and the influence of the mentioned factors. The analysed structure can be considered as the upper layer of an industrial floor in a chemical plant. It is important to determine the theoretical service life at which the structure shall be inspected or replaced. The results, in general, show that a higher amount of fibres reduces the service life as well as the preloading of the structure. An exception was a mixture with 1% of fibre loaded to 50% USC, which shows a lower diffusion coefficient than the specimens without preloading.https://www.mdpi.com/2075-5309/11/10/489waste aggregateservice lifechloridemodellingsteel fibreslightweight concrete |
| spellingShingle | Petr Lehner Marie Horňáková Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive Environment Buildings waste aggregate service life chloride modelling steel fibres lightweight concrete |
| title | Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive Environment |
| title_full | Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive Environment |
| title_fullStr | Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive Environment |
| title_full_unstemmed | Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive Environment |
| title_short | Effect of Amount of Fibre and Damage Level on Service Life of SFR Recycled Concrete in Aggressive Environment |
| title_sort | effect of amount of fibre and damage level on service life of sfr recycled concrete in aggressive environment |
| topic | waste aggregate service life chloride modelling steel fibres lightweight concrete |
| url | https://www.mdpi.com/2075-5309/11/10/489 |
| work_keys_str_mv | AT petrlehner effectofamountoffibreanddamagelevelonservicelifeofsfrrecycledconcreteinaggressiveenvironment AT mariehornakova effectofamountoffibreanddamagelevelonservicelifeofsfrrecycledconcreteinaggressiveenvironment |