Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading
This study examines the stress-strain behavior of recycled concrete subjected to various recycled material mixture systems and varying steel fiber (SF) volume contents. Uniaxial cyclic loading tests were conducted to assess the failure modes, stress-strain curves, axial compressive strength, and res...
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| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524012919 |
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| author | Shuqi Guo Yahong Ding Ping Xu Jun Wu Jiuwen Bao |
| author_facet | Shuqi Guo Yahong Ding Ping Xu Jun Wu Jiuwen Bao |
| author_sort | Shuqi Guo |
| collection | DOAJ |
| description | This study examines the stress-strain behavior of recycled concrete subjected to various recycled material mixture systems and varying steel fiber (SF) volume contents. Uniaxial cyclic loading tests were conducted to assess the failure modes, stress-strain curves, axial compressive strength, and residual strains. The findings indicate that incorporating recycled materials shift the failure mode from vertical splitting to oblique shear and reduces the stress-strain curve's ascending slopes and axial compressive strength. Specifically, the strength of fully recycled aggregate concrete experienced the greatest reduction of 26.27 % relative to natural concrete, and only a 2.4 % reduction compared to fully recycled fine aggregate concrete (FRFAC). The inclusion of SF significantly enhances the cyclic compression resistance and ductility of recycled concrete, increasing both the cycle count and the maximum cumulative residual strain. At a fiber content of 1.5 %, FRFAC's cycle count increased by 20 compared to the control, and the maximum cumulative residual strain rose from 0.86 to 10.38. The relationship between residual strain and unloaded/reloaded strain is described by introducing recycled material coefficient and SF characteristic parameter. Based on the test data, the unloading and reloading equations proposed, and the damage evolution equation including residual strain proposed on the basis of stiffness degradation. A constitutive model for SF reinforced fully recycled coarse/fine aggregate concrete is developed, capable of characterizing the effects of different recycled materials and SF content. This model accurately predicts the unloading/reloading path, residual strain progression, and damage evolution. |
| format | Article |
| id | doaj-art-427f4ea1ca1a482d84aa50d96fdcd21e |
| institution | DOAJ |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-427f4ea1ca1a482d84aa50d96fdcd21e2025-08-20T02:56:48ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0413910.1016/j.cscm.2024.e04139Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loadingShuqi Guo0Yahong Ding1Ping Xu2Jun Wu3Jiuwen Bao4Department of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaDepartment of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China; Corresponding author.Department of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266520, ChinaThis study examines the stress-strain behavior of recycled concrete subjected to various recycled material mixture systems and varying steel fiber (SF) volume contents. Uniaxial cyclic loading tests were conducted to assess the failure modes, stress-strain curves, axial compressive strength, and residual strains. The findings indicate that incorporating recycled materials shift the failure mode from vertical splitting to oblique shear and reduces the stress-strain curve's ascending slopes and axial compressive strength. Specifically, the strength of fully recycled aggregate concrete experienced the greatest reduction of 26.27 % relative to natural concrete, and only a 2.4 % reduction compared to fully recycled fine aggregate concrete (FRFAC). The inclusion of SF significantly enhances the cyclic compression resistance and ductility of recycled concrete, increasing both the cycle count and the maximum cumulative residual strain. At a fiber content of 1.5 %, FRFAC's cycle count increased by 20 compared to the control, and the maximum cumulative residual strain rose from 0.86 to 10.38. The relationship between residual strain and unloaded/reloaded strain is described by introducing recycled material coefficient and SF characteristic parameter. Based on the test data, the unloading and reloading equations proposed, and the damage evolution equation including residual strain proposed on the basis of stiffness degradation. A constitutive model for SF reinforced fully recycled coarse/fine aggregate concrete is developed, capable of characterizing the effects of different recycled materials and SF content. This model accurately predicts the unloading/reloading path, residual strain progression, and damage evolution.http://www.sciencedirect.com/science/article/pii/S2214509524012919Fully recycled coarse/fine concreteCyclic loadingResidual strainDamage evolutionConstitutive model |
| spellingShingle | Shuqi Guo Yahong Ding Ping Xu Jun Wu Jiuwen Bao Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading Case Studies in Construction Materials Fully recycled coarse/fine concrete Cyclic loading Residual strain Damage evolution Constitutive model |
| title | Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading |
| title_full | Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading |
| title_fullStr | Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading |
| title_full_unstemmed | Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading |
| title_short | Stress-strain relationship of steel fiber reinforced fully recycled coarse/fine aggregate concrete under cyclic loading |
| title_sort | stress strain relationship of steel fiber reinforced fully recycled coarse fine aggregate concrete under cyclic loading |
| topic | Fully recycled coarse/fine concrete Cyclic loading Residual strain Damage evolution Constitutive model |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524012919 |
| work_keys_str_mv | AT shuqiguo stressstrainrelationshipofsteelfiberreinforcedfullyrecycledcoarsefineaggregateconcreteundercyclicloading AT yahongding stressstrainrelationshipofsteelfiberreinforcedfullyrecycledcoarsefineaggregateconcreteundercyclicloading AT pingxu stressstrainrelationshipofsteelfiberreinforcedfullyrecycledcoarsefineaggregateconcreteundercyclicloading AT junwu stressstrainrelationshipofsteelfiberreinforcedfullyrecycledcoarsefineaggregateconcreteundercyclicloading AT jiuwenbao stressstrainrelationshipofsteelfiberreinforcedfullyrecycledcoarsefineaggregateconcreteundercyclicloading |