Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres
Reducing the crack width is a vital feature for protecting rebars from corrosion. In this investigation, the impact of steel fibres (SFs) on the cracking of recycled coarse aggregate reinforced concrete (RCARC) beams was investigated. Twenty-seven reinforced concrete (RC) experimental samples (150 m...
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doaj-46f86975b09946dca9b88e9af40a0c8e2020-11-25T04:08:01ZengMDPI AGApplied Sciences2076-34172020-10-01107587758710.3390/app10217587Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel FibresMansour Ghalehnovi0Arash Karimipour1Jorge de Brito2Hamid Reza Chaboki3Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad 91779-48974, IranDepartment of Civil Engineering, Texas University at El Paso. Member of Center for Transportation Infrastructure Systems (CTIS), El Paso, TX 79968, USADepartment of Civil Engineering, Architecture and Georresources, Instituto Superior Técnico, Universidade de Lisboa, 1649-004 Lisbon, PortugalDepartment of Civil Engineering, University of Birjand, Birjand 97174-34765, IranReducing the crack width is a vital feature for protecting rebars from corrosion. In this investigation, the impact of steel fibres (SFs) on the cracking of recycled coarse aggregate reinforced concrete (RCARC) beams was investigated. Twenty-seven reinforced concrete (RC) experimental samples (150 mm × 200 mm × 1500 mm) were manufactured. Shear rebars were considered with different spacings. Specimens were tested under a four-point flexural setup. Recycled coarse aggregate (RCA) from a destroyed building was employed at 0%, 50% and 100% by weight. SFs were added at three contents (0%, 1% and 2%) in order to reduce the crack width. The mid-span load–displacement relationship and the crack propagation and width were measured during the tests. Therefore, this study intended to assess the impact of utilising RCA and natural coarse aggregate on cracks’ spacing and propagation in RC beams when SFs were employed. The obtained outcomes were compared with the requirements of CSA S474, NS 3473E, EC2-04, CEB-FIP and ACI 224R-01. It was found that enough shear rebars should be provided through the beams to control the crack width and propagation, but that SFs enhanced the bending performance of RCARC with no shear rebars.https://www.mdpi.com/2076-3417/10/21/7587crack widthflexural behaviourrecycled aggregatereinforced concrete beamssteel fibres |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mansour Ghalehnovi Arash Karimipour Jorge de Brito Hamid Reza Chaboki |
spellingShingle |
Mansour Ghalehnovi Arash Karimipour Jorge de Brito Hamid Reza Chaboki Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres Applied Sciences crack width flexural behaviour recycled aggregate reinforced concrete beams steel fibres |
author_facet |
Mansour Ghalehnovi Arash Karimipour Jorge de Brito Hamid Reza Chaboki |
author_sort |
Mansour Ghalehnovi |
title |
Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres |
title_short |
Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres |
title_full |
Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres |
title_fullStr |
Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres |
title_full_unstemmed |
Crack Width and Propagation in Recycled Coarse Aggregate Concrete Beams Reinforced with Steel Fibres |
title_sort |
crack width and propagation in recycled coarse aggregate concrete beams reinforced with steel fibres |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2020-10-01 |
description |
Reducing the crack width is a vital feature for protecting rebars from corrosion. In this investigation, the impact of steel fibres (SFs) on the cracking of recycled coarse aggregate reinforced concrete (RCARC) beams was investigated. Twenty-seven reinforced concrete (RC) experimental samples (150 mm × 200 mm × 1500 mm) were manufactured. Shear rebars were considered with different spacings. Specimens were tested under a four-point flexural setup. Recycled coarse aggregate (RCA) from a destroyed building was employed at 0%, 50% and 100% by weight. SFs were added at three contents (0%, 1% and 2%) in order to reduce the crack width. The mid-span load–displacement relationship and the crack propagation and width were measured during the tests. Therefore, this study intended to assess the impact of utilising RCA and natural coarse aggregate on cracks’ spacing and propagation in RC beams when SFs were employed. The obtained outcomes were compared with the requirements of CSA S474, NS 3473E, EC2-04, CEB-FIP and ACI 224R-01. It was found that enough shear rebars should be provided through the beams to control the crack width and propagation, but that SFs enhanced the bending performance of RCARC with no shear rebars. |
topic |
crack width flexural behaviour recycled aggregate reinforced concrete beams steel fibres |
url |
https://www.mdpi.com/2076-3417/10/21/7587 |
work_keys_str_mv |
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