Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slab
The effects of aggregate carbonation, overall specimen carbonation, and the combined method of aggregate carbonation and overall specimen carbonation on the mechanical properties of recycled coarse aggregate concrete (RAC) were investigated. Furthermore, the flexural behaviors of steel bar trusses c...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525007387 |
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| author | Yueqing Gao Sijie Shen Ke Ye Zeshen Li Wei Wang Jingyi Lu Shaodan Hou Yangyang Yin Chaofeng Liang |
| author_facet | Yueqing Gao Sijie Shen Ke Ye Zeshen Li Wei Wang Jingyi Lu Shaodan Hou Yangyang Yin Chaofeng Liang |
| author_sort | Yueqing Gao |
| collection | DOAJ |
| description | The effects of aggregate carbonation, overall specimen carbonation, and the combined method of aggregate carbonation and overall specimen carbonation on the mechanical properties of recycled coarse aggregate concrete (RAC) were investigated. Furthermore, the flexural behaviors of steel bar trusses composite slab (SBTCS) prepared by RAC and cured by the three carbonation methods were studied through experiments and numerical analysis. The results indicated that: (1) The mechanical properties of RAC after carbonation were significantly improved, and the concrete prepared by the combined method of aggregate carbonation and overall specimen carbonation showed the highest strength. (2) The stress-strain constitutive models of RAC under different carbonation methods were built according to the experimental results. (3) The failure modes of the carbonated concrete SBTCSs were basically consistent and the precast layer and the cast-in-situ layer deformed coordinately during the loading process. (4) The SBTCS prepared by the combined method of aggregate carbonation and overall specimen carbonation showed the best bending performance, and the ultimate load bearing capacity increased by 16.2 % compared to the SBTCS made by non-carbonated RAC. (5) The load-displacement curves and damage contours of the SBTCSs obtained from the numerical analysis were in good agreement with the experimental results, and the maximum deviation between the simulated ultimate load and the experimental value was 8.8 %. |
| format | Article |
| id | doaj-art-ccd836724ecc43e99192bdd0be4cd45e |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-ccd836724ecc43e99192bdd0be4cd45e2025-08-20T03:47:19ZengElsevierCase Studies in Construction Materials2214-50952025-12-0123e0494010.1016/j.cscm.2025.e04940Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slabYueqing Gao0Sijie Shen1Ke Ye2Zeshen Li3Wei Wang4Jingyi Lu5Shaodan Hou6Yangyang Yin7Chaofeng Liang8School of Civil Engineering, Shaoxing University, Shaoxing 312000, PR ChinaSchool of Civil Engineering, Shaoxing University, Shaoxing 312000, PR ChinaSchool of Civil Engineering, Shaoxing University, Shaoxing 312000, PR ChinaSchool of Civil Engineering, Shaoxing University, Shaoxing 312000, PR China; State Key Laboratory of Intelligent Deep Metal Mining and Equipment, Shaoxing University, Shaoxing 312000, PR ChinaSchool of Civil Engineering, Shaoxing University, Shaoxing 312000, PR ChinaSchool of Civil Engineering, Shaoxing University, Shaoxing 312000, PR ChinaSchool of Civil Engineering, Shaoxing University, Shaoxing 312000, PR ChinaSchool of Civil Engineering, Shaoxing University, Shaoxing 312000, PR China; Corresponding author.School of Civil Engineering, Shaoxing University, Shaoxing 312000, PR China; State Key Laboratory of Intelligent Deep Metal Mining and Equipment, Shaoxing University, Shaoxing 312000, PR ChinaThe effects of aggregate carbonation, overall specimen carbonation, and the combined method of aggregate carbonation and overall specimen carbonation on the mechanical properties of recycled coarse aggregate concrete (RAC) were investigated. Furthermore, the flexural behaviors of steel bar trusses composite slab (SBTCS) prepared by RAC and cured by the three carbonation methods were studied through experiments and numerical analysis. The results indicated that: (1) The mechanical properties of RAC after carbonation were significantly improved, and the concrete prepared by the combined method of aggregate carbonation and overall specimen carbonation showed the highest strength. (2) The stress-strain constitutive models of RAC under different carbonation methods were built according to the experimental results. (3) The failure modes of the carbonated concrete SBTCSs were basically consistent and the precast layer and the cast-in-situ layer deformed coordinately during the loading process. (4) The SBTCS prepared by the combined method of aggregate carbonation and overall specimen carbonation showed the best bending performance, and the ultimate load bearing capacity increased by 16.2 % compared to the SBTCS made by non-carbonated RAC. (5) The load-displacement curves and damage contours of the SBTCSs obtained from the numerical analysis were in good agreement with the experimental results, and the maximum deviation between the simulated ultimate load and the experimental value was 8.8 %.http://www.sciencedirect.com/science/article/pii/S2214509525007387Recycled coarse aggregate concreteCarbonationSteel bar trusses composite slabFlexural behavior |
| spellingShingle | Yueqing Gao Sijie Shen Ke Ye Zeshen Li Wei Wang Jingyi Lu Shaodan Hou Yangyang Yin Chaofeng Liang Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slab Case Studies in Construction Materials Recycled coarse aggregate concrete Carbonation Steel bar trusses composite slab Flexural behavior |
| title | Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slab |
| title_full | Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slab |
| title_fullStr | Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slab |
| title_full_unstemmed | Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slab |
| title_short | Study on flexural behavior of CO2 cured recycled coarse aggregate concrete steel bar trusses composite slab |
| title_sort | study on flexural behavior of co2 cured recycled coarse aggregate concrete steel bar trusses composite slab |
| topic | Recycled coarse aggregate concrete Carbonation Steel bar trusses composite slab Flexural behavior |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525007387 |
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