Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate Concrete
This paper investigates the mechanical and micro-interfacial properties of recycled concrete. Concrete specimens with recycled brick coarse aggregate (RBCA) admixtures of 0%, 25%, 50%, 75%, and 100% were prepared. Apparent density, slump, and mechanical tests were carried out to evaluate the propert...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/18/9035 |
| _version_ | 1797491543206002688 |
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| author | Yongcheng Ji Dayang Wang Lifeng Wang |
| author_facet | Yongcheng Ji Dayang Wang Lifeng Wang |
| author_sort | Yongcheng Ji |
| collection | DOAJ |
| description | This paper investigates the mechanical and micro-interfacial properties of recycled concrete. Concrete specimens with recycled brick coarse aggregate (RBCA) admixtures of 0%, 25%, 50%, 75%, and 100% were prepared. Apparent density, slump, and mechanical tests were carried out to evaluate the properties and behavior of the recycled concrete. The evolution laws of parameters such as compressive strength, peak strain, and elastic modulus of the recycled concrete specimens were tested and analyzed. Combined with numerical analysis, the stress distribution and damage propagation process of recycled concrete specimens with different RBCA contents were revealed. Furthermore, the RBCA content parameters and the thickness of the interface transition zone were analyzed to predict the mechanical behavior of RBCA concrete. The results show that the slump of fresh recycled concrete is less than 50 mm when the content of RBCA exceeds 50%. The apparent density of concrete is 15.55% lower than that of ordinary concrete when the content of RBCA is 100%. The cube compressive strength of RBCA concrete decreases with increased RBCA content. With increasing RBCA substitution rate, the internal cracks change from discrete to concentrated. The substitution rate of RBCA and thickness of the interfacial transition zone are negatively correlated with compressive strength and positively correlated with elastic modulus and peak stress. |
| first_indexed | 2024-03-10T00:50:49Z |
| format | Article |
| id | doaj.art-468ffe69f6e843489dfdfd121c4835a3 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T00:50:49Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-468ffe69f6e843489dfdfd121c4835a32023-11-23T14:52:08ZengMDPI AGApplied Sciences2076-34172022-09-011218903510.3390/app12189035Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate ConcreteYongcheng Ji0Dayang Wang1Lifeng Wang2School of Civil Engineering, Northeast Forest University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forest University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forest University, Harbin 150040, ChinaThis paper investigates the mechanical and micro-interfacial properties of recycled concrete. Concrete specimens with recycled brick coarse aggregate (RBCA) admixtures of 0%, 25%, 50%, 75%, and 100% were prepared. Apparent density, slump, and mechanical tests were carried out to evaluate the properties and behavior of the recycled concrete. The evolution laws of parameters such as compressive strength, peak strain, and elastic modulus of the recycled concrete specimens were tested and analyzed. Combined with numerical analysis, the stress distribution and damage propagation process of recycled concrete specimens with different RBCA contents were revealed. Furthermore, the RBCA content parameters and the thickness of the interface transition zone were analyzed to predict the mechanical behavior of RBCA concrete. The results show that the slump of fresh recycled concrete is less than 50 mm when the content of RBCA exceeds 50%. The apparent density of concrete is 15.55% lower than that of ordinary concrete when the content of RBCA is 100%. The cube compressive strength of RBCA concrete decreases with increased RBCA content. With increasing RBCA substitution rate, the internal cracks change from discrete to concentrated. The substitution rate of RBCA and thickness of the interfacial transition zone are negatively correlated with compressive strength and positively correlated with elastic modulus and peak stress.https://www.mdpi.com/2076-3417/12/18/9035mechanical performancerandom aggregate modeldamage mechanismmesoscopic mechanicsrecycled aggregate concrete |
| spellingShingle | Yongcheng Ji Dayang Wang Lifeng Wang Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate Concrete Applied Sciences mechanical performance random aggregate model damage mechanism mesoscopic mechanics recycled aggregate concrete |
| title | Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate Concrete |
| title_full | Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate Concrete |
| title_fullStr | Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate Concrete |
| title_full_unstemmed | Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate Concrete |
| title_short | Numerical and Experimental Investigation of Recycled Brick Coarse Aggregate Concrete |
| title_sort | numerical and experimental investigation of recycled brick coarse aggregate concrete |
| topic | mechanical performance random aggregate model damage mechanism mesoscopic mechanics recycled aggregate concrete |
| url | https://www.mdpi.com/2076-3417/12/18/9035 |
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