The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate Concrete
For the environment protection and sustainable development in building construction, waste concrete can be processed into recycled aggregate to mix the recycled aggregate concrete (RAC). However, the existing mix design methods of RAC were complex, and the mechanical properties of RAC were more weak...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/13/3533 |
| _version_ | 1797412026419511296 |
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| author | Chong Rong Jing Ma Qingxuan Shi Qiuwei Wang |
| author_facet | Chong Rong Jing Ma Qingxuan Shi Qiuwei Wang |
| author_sort | Chong Rong |
| collection | DOAJ |
| description | For the environment protection and sustainable development in building construction, waste concrete can be processed into recycled aggregate to mix the recycled aggregate concrete (RAC). However, the existing mix design methods of RAC were complex, and the mechanical properties of RAC were more weakened than ordinary concrete. This paper presents a simple mix design method for RAC, including orthogonal test and single-factor test. Then, in order to study the behavior of confined RAC, this paper presents a comprehensive experimental study on the RAC filled in steel tube (RCFST) specimens and the RAC filled in GFRP tube (RCFST) specimens. The results show that the proposed mix design method can mix different stable strength grades of RAC promptly and efficiently. In addition, the steel tube and GFRP tube can provide a well confining effect on core RAC to improve the mechanical behavior of column. Moreover, the properties of core RAC in steel tube are the same as the common passive confined concrete, and the properties of core RAC in the GFRP tube are the same as the common active confined concrete. The study results can provide reference for other kinds of RAC mixtures as well as be a foundation for theoretical studies on confined RAC. |
| first_indexed | 2024-03-09T04:55:01Z |
| format | Article |
| id | doaj.art-51de883dc87c4fe79c6fb0e5850d7ee1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T04:55:01Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-51de883dc87c4fe79c6fb0e5850d7ee12023-12-03T13:06:06ZengMDPI AGMaterials1996-19442021-06-011413353310.3390/ma14133533The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate ConcreteChong Rong0Jing Ma1Qingxuan Shi2Qiuwei Wang3State Key Laboratory of Green Building, Western China of Xian University of Architecture & Technology, Xi’an 710055, ChinaCollege of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, ChinaState Key Laboratory of Green Building, Western China of Xian University of Architecture & Technology, Xi’an 710055, ChinaState Key Laboratory of Green Building, Western China of Xian University of Architecture & Technology, Xi’an 710055, ChinaFor the environment protection and sustainable development in building construction, waste concrete can be processed into recycled aggregate to mix the recycled aggregate concrete (RAC). However, the existing mix design methods of RAC were complex, and the mechanical properties of RAC were more weakened than ordinary concrete. This paper presents a simple mix design method for RAC, including orthogonal test and single-factor test. Then, in order to study the behavior of confined RAC, this paper presents a comprehensive experimental study on the RAC filled in steel tube (RCFST) specimens and the RAC filled in GFRP tube (RCFST) specimens. The results show that the proposed mix design method can mix different stable strength grades of RAC promptly and efficiently. In addition, the steel tube and GFRP tube can provide a well confining effect on core RAC to improve the mechanical behavior of column. Moreover, the properties of core RAC in steel tube are the same as the common passive confined concrete, and the properties of core RAC in the GFRP tube are the same as the common active confined concrete. The study results can provide reference for other kinds of RAC mixtures as well as be a foundation for theoretical studies on confined RAC.https://www.mdpi.com/1996-1944/14/13/3533recycled aggregate concreteRAC filled in steel tubeRAC filled in GFRP tubemix design methodexperimental study |
| spellingShingle | Chong Rong Jing Ma Qingxuan Shi Qiuwei Wang The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate Concrete Materials recycled aggregate concrete RAC filled in steel tube RAC filled in GFRP tube mix design method experimental study |
| title | The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate Concrete |
| title_full | The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate Concrete |
| title_fullStr | The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate Concrete |
| title_full_unstemmed | The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate Concrete |
| title_short | The Simple Mix Design Method and Confined Behavior Analysis for Recycled Aggregate Concrete |
| title_sort | simple mix design method and confined behavior analysis for recycled aggregate concrete |
| topic | recycled aggregate concrete RAC filled in steel tube RAC filled in GFRP tube mix design method experimental study |
| url | https://www.mdpi.com/1996-1944/14/13/3533 |
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