Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover
Recycled aggregate concrete is a solution used to minimize the environmental impact of the concrete industry. Notwithstanding research worldwide validating structural applications of recycled aggregate concrete, specific design guidelines are lacking and are needed to address reservations of constru...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/3/284 |
| _version_ | 1797541480633466880 |
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| author | António Albuquerque João Nuno Pacheco Jorge de Brito |
| author_facet | António Albuquerque João Nuno Pacheco Jorge de Brito |
| author_sort | António Albuquerque |
| collection | DOAJ |
| description | Recycled aggregate concrete is a solution used to minimize the environmental impact of the concrete industry. Notwithstanding research worldwide validating structural applications of recycled aggregate concrete, specific design guidelines are lacking and are needed to address reservations of construction agents. Design guidelines should be based on reliability concepts, including the stochastic modeling of material properties and the calibration of design clauses through reliability methods. This paper concerns the concrete cover design of recycled aggregate concrete elements exposed to chloride ingress. Only coarse recycled aggregates produced from concrete waste are studied. The paper describes the chloride ingress model of <i>fib</i> Bulletin 34, presents experiments on the chloride ion migration of several analogue natural and recycled aggregate concrete mixes, tackles the stochastic modeling of the chloride migration coefficient, and calibrates concrete cover design for recycled aggregate concrete using reliability methods. The concrete cover design followed the deemed-to-satisfy provisions of Eurocode 2 and EN 206. The case studies used in the reliability analyses covered several design situations. A 5 mm increase of concrete cover is recommended as a simple option that ensures that the probability of depassivation due to chloride ingress on recycled aggregate concrete elements is equivalent to that for analogue natural aggregate concrete elements. |
| first_indexed | 2024-03-10T13:16:38Z |
| format | Article |
| id | doaj.art-9d54aadad9ff4944ba3f4ab2295ebdf8 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T13:16:38Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-9d54aadad9ff4944ba3f4ab2295ebdf82023-11-21T10:23:16ZengMDPI AGCrystals2073-43522021-03-0111328410.3390/cryst11030284Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of CoverAntónio Albuquerque0João Nuno Pacheco1Jorge de Brito2CERIS-ICIST, IST, Universidade de Lisboa, 1049-001 Lisbon, PortugalCERIS-ICIST, IST, Universidade de Lisboa, 1049-001 Lisbon, PortugalCERIS-ICIST, IST, Universidade de Lisboa, 1049-001 Lisbon, PortugalRecycled aggregate concrete is a solution used to minimize the environmental impact of the concrete industry. Notwithstanding research worldwide validating structural applications of recycled aggregate concrete, specific design guidelines are lacking and are needed to address reservations of construction agents. Design guidelines should be based on reliability concepts, including the stochastic modeling of material properties and the calibration of design clauses through reliability methods. This paper concerns the concrete cover design of recycled aggregate concrete elements exposed to chloride ingress. Only coarse recycled aggregates produced from concrete waste are studied. The paper describes the chloride ingress model of <i>fib</i> Bulletin 34, presents experiments on the chloride ion migration of several analogue natural and recycled aggregate concrete mixes, tackles the stochastic modeling of the chloride migration coefficient, and calibrates concrete cover design for recycled aggregate concrete using reliability methods. The concrete cover design followed the deemed-to-satisfy provisions of Eurocode 2 and EN 206. The case studies used in the reliability analyses covered several design situations. A 5 mm increase of concrete cover is recommended as a simple option that ensures that the probability of depassivation due to chloride ingress on recycled aggregate concrete elements is equivalent to that for analogue natural aggregate concrete elements.https://www.mdpi.com/2073-4352/11/3/284Eurocode 2<i>fib</i> Bulletin 34reinforced concretechloride penetrationdurability designreliability analysis |
| spellingShingle | António Albuquerque João Nuno Pacheco Jorge de Brito Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover Crystals Eurocode 2 <i>fib</i> Bulletin 34 reinforced concrete chloride penetration durability design reliability analysis |
| title | Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover |
| title_full | Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover |
| title_fullStr | Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover |
| title_full_unstemmed | Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover |
| title_short | Eurocode Design of Recycled Aggregate Concrete for Chloride Environments: Stochastic Modeling of Chloride Migration and Reliability-Based Calibration of Cover |
| title_sort | eurocode design of recycled aggregate concrete for chloride environments stochastic modeling of chloride migration and reliability based calibration of cover |
| topic | Eurocode 2 <i>fib</i> Bulletin 34 reinforced concrete chloride penetration durability design reliability analysis |
| url | https://www.mdpi.com/2073-4352/11/3/284 |
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