Durability of recycled aggregate concrete in cold regions
The combination of experimental programs and finite element numerical methods is adopted to explore the durability of WBC (waste brick concrete). Rapid freeze-thaw and flexural tests are performed with the content of WBCA (waste brick coarse aggregate) and the number of freeze-thaw cycles as variabl...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522006076 |
| _version_ | 1798032913584881664 |
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| author | Yongcheng Ji Dayang Wang |
| author_facet | Yongcheng Ji Dayang Wang |
| author_sort | Yongcheng Ji |
| collection | DOAJ |
| description | The combination of experimental programs and finite element numerical methods is adopted to explore the durability of WBC (waste brick concrete). Rapid freeze-thaw and flexural tests are performed with the content of WBCA (waste brick coarse aggregate) and the number of freeze-thaw cycles as variables. Freeze-thaw damage mechanisms at the microscopic interfaces of recycled concrete are revealed by scanning electron microscopy. The evolution laws of relative dynamic elastic modulus, mass loss rate, and flexural and tensile strength loss rate are analyzed. Combined with numerical simulations, the temperature stress distribution and three-point bending damage law of concrete with 100 % WBCA content at different freeze-thaw times are shown, and practical examples are verified. Results showed that WBC with high WBCA content has poor freeze-thaw resistance. Furthermore, WBC's freezing resistance and bending properties deteriorate as the number of freeze-thaw cycles increases. Possible damaged locations in the concrete are determined by stress analysis. The finite element model can predict the flexural performance of WBC better with an error of 4.5 % for the peak load and 3.5 % for the peak displacement of the beam. Therefore, the presented model can also be used to predict the performance of concrete after freezing and thawing under any WBCA replacement rate. |
| first_indexed | 2024-04-11T20:21:44Z |
| format | Article |
| id | doaj.art-869034638ce34aa9943f2b749f5ff10f |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-11T20:21:44Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-869034638ce34aa9943f2b749f5ff10f2022-12-22T04:04:48ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01475Durability of recycled aggregate concrete in cold regionsYongcheng Ji0Dayang Wang1Corresponding author.; College of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaCollege of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaThe combination of experimental programs and finite element numerical methods is adopted to explore the durability of WBC (waste brick concrete). Rapid freeze-thaw and flexural tests are performed with the content of WBCA (waste brick coarse aggregate) and the number of freeze-thaw cycles as variables. Freeze-thaw damage mechanisms at the microscopic interfaces of recycled concrete are revealed by scanning electron microscopy. The evolution laws of relative dynamic elastic modulus, mass loss rate, and flexural and tensile strength loss rate are analyzed. Combined with numerical simulations, the temperature stress distribution and three-point bending damage law of concrete with 100 % WBCA content at different freeze-thaw times are shown, and practical examples are verified. Results showed that WBC with high WBCA content has poor freeze-thaw resistance. Furthermore, WBC's freezing resistance and bending properties deteriorate as the number of freeze-thaw cycles increases. Possible damaged locations in the concrete are determined by stress analysis. The finite element model can predict the flexural performance of WBC better with an error of 4.5 % for the peak load and 3.5 % for the peak displacement of the beam. Therefore, the presented model can also be used to predict the performance of concrete after freezing and thawing under any WBCA replacement rate.http://www.sciencedirect.com/science/article/pii/S2214509522006076Recycled concreteFrost resistanceMicro-analysisFlexural propertiesNumerical simulation |
| spellingShingle | Yongcheng Ji Dayang Wang Durability of recycled aggregate concrete in cold regions Case Studies in Construction Materials Recycled concrete Frost resistance Micro-analysis Flexural properties Numerical simulation |
| title | Durability of recycled aggregate concrete in cold regions |
| title_full | Durability of recycled aggregate concrete in cold regions |
| title_fullStr | Durability of recycled aggregate concrete in cold regions |
| title_full_unstemmed | Durability of recycled aggregate concrete in cold regions |
| title_short | Durability of recycled aggregate concrete in cold regions |
| title_sort | durability of recycled aggregate concrete in cold regions |
| topic | Recycled concrete Frost resistance Micro-analysis Flexural properties Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522006076 |
| work_keys_str_mv | AT yongchengji durabilityofrecycledaggregateconcreteincoldregions AT dayangwang durabilityofrecycledaggregateconcreteincoldregions |