Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes
The early shrinkage-deformation and mechanical property evolution of gradient-structured composites in extreme environments are still insufficient. The paper prepared ordinary Portland cement-alkali-activated slag (OPC-AAS) and ordinary Portland cement-alkali-activated metakaolin (OPC-AAMK) gradient...
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2025.1527502/full |
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| author | Xinzhe Li Ganyou Jiang Naishuang Wang Yisong Wei Zheng Chen Zheng Chen Jing Li Jing Li Ben Chen Ben Chen Jiamin Yu Jiamin Yu |
| author_facet | Xinzhe Li Ganyou Jiang Naishuang Wang Yisong Wei Zheng Chen Zheng Chen Jing Li Jing Li Ben Chen Ben Chen Jiamin Yu Jiamin Yu |
| author_sort | Xinzhe Li |
| collection | DOAJ |
| description | The early shrinkage-deformation and mechanical property evolution of gradient-structured composites in extreme environments are still insufficient. The paper prepared ordinary Portland cement-alkali-activated slag (OPC-AAS) and ordinary Portland cement-alkali-activated metakaolin (OPC-AAMK) gradient-structured composite by stacking cement and alkali-activated materials together. The effects of temperature difference cycling and wetdry cycling extremes on the early shrinkage strain and splitting strength of OPC-AAS and OPC-AAMK composites, as well as the structure of the bond interface and the micromorphology of the hydration products, were comparatively analyzed. The results demonstrated that the temperature difference cycling affected the early deformation and bond strength of the gradient-structured composite interfaces more significantly than the dry-wet cycling. The maximum expansion strains of OPC-AAS and OPC-AAMK were 1,130.88 μm and 1,399.25 μm, respectively, under the effect of temperature difference cycling; the splitting strengths of OPC-AAS and OPC-AAMK after three cycles of temperature difference cycling were reduced by 26.37% and 31.32%, respectively, compared with that after three cycles of wet-dry cycling. In addition, the OPC-AAS composites showed better interfacial bonding properties after extreme environmental cycling compared to the OPC-AAMK composites. The early splitting strengths under the two extreme environmental effects increased and then decreased, and the maximum splitting strengths of OPCAAS were 2.66 MPa and 3.65 MPa under the temperature difference cycling and dry-wet cycling, respectively, which were 5.14% and 35.69% higher than those of OPC-AAMK, respectively. Scanning electron microscopy (SEM) characterization analysis showed that the temperature difference cycling resulted in more severe product decomposition of the AAMK cementitious material, and obvious cracks and holes appeared at the bonding interface of OPC-AAMK. This study provides some references for the optimal design of the early shrinkage-deformation properties and mechanical properties of gradient-structured composites under extreme environments as well as the assessment of service life. |
| format | Article |
| id | doaj-art-1d9b416463f846c283e33822223b51db |
| institution | Kabale University |
| issn | 2296-8016 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Materials |
| spelling | doaj-art-1d9b416463f846c283e33822223b51db2025-02-04T06:31:43ZengFrontiers Media S.A.Frontiers in Materials2296-80162025-02-011210.3389/fmats.2025.15275021527502Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changesXinzhe Li0Ganyou Jiang1Naishuang Wang2Yisong Wei3Zheng Chen4Zheng Chen5Jing Li6Jing Li7Ben Chen8Ben Chen9Jiamin Yu10Jiamin Yu11Guangxi Road and Bridge Engineering Group Co, Nanning, ChinaGuangxi Guanglu Industrial Investment Group Co, Nanning, ChinaGuangxi Road and Bridge Engineering Group Co, Nanning, ChinaGuangxi Road and Bridge Engineering Group Co, Nanning, ChinaKey Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning, ChinaKey Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning, ChinaKey Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning, ChinaKey Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning, ChinaThe early shrinkage-deformation and mechanical property evolution of gradient-structured composites in extreme environments are still insufficient. The paper prepared ordinary Portland cement-alkali-activated slag (OPC-AAS) and ordinary Portland cement-alkali-activated metakaolin (OPC-AAMK) gradient-structured composite by stacking cement and alkali-activated materials together. The effects of temperature difference cycling and wetdry cycling extremes on the early shrinkage strain and splitting strength of OPC-AAS and OPC-AAMK composites, as well as the structure of the bond interface and the micromorphology of the hydration products, were comparatively analyzed. The results demonstrated that the temperature difference cycling affected the early deformation and bond strength of the gradient-structured composite interfaces more significantly than the dry-wet cycling. The maximum expansion strains of OPC-AAS and OPC-AAMK were 1,130.88 μm and 1,399.25 μm, respectively, under the effect of temperature difference cycling; the splitting strengths of OPC-AAS and OPC-AAMK after three cycles of temperature difference cycling were reduced by 26.37% and 31.32%, respectively, compared with that after three cycles of wet-dry cycling. In addition, the OPC-AAS composites showed better interfacial bonding properties after extreme environmental cycling compared to the OPC-AAMK composites. The early splitting strengths under the two extreme environmental effects increased and then decreased, and the maximum splitting strengths of OPCAAS were 2.66 MPa and 3.65 MPa under the temperature difference cycling and dry-wet cycling, respectively, which were 5.14% and 35.69% higher than those of OPC-AAMK, respectively. Scanning electron microscopy (SEM) characterization analysis showed that the temperature difference cycling resulted in more severe product decomposition of the AAMK cementitious material, and obvious cracks and holes appeared at the bonding interface of OPC-AAMK. This study provides some references for the optimal design of the early shrinkage-deformation properties and mechanical properties of gradient-structured composites under extreme environments as well as the assessment of service life.https://www.frontiersin.org/articles/10.3389/fmats.2025.1527502/fullgradient-structured compositealkali-activated mortartemperature difference cyclingwet-dry cyclingshrinkage strainsplitting strength |
| spellingShingle | Xinzhe Li Ganyou Jiang Naishuang Wang Yisong Wei Zheng Chen Zheng Chen Jing Li Jing Li Ben Chen Ben Chen Jiamin Yu Jiamin Yu Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes Frontiers in Materials gradient-structured composite alkali-activated mortar temperature difference cycling wet-dry cycling shrinkage strain splitting strength |
| title | Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes |
| title_full | Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes |
| title_fullStr | Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes |
| title_full_unstemmed | Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes |
| title_short | Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes |
| title_sort | study of interfacial bonding properties and shrinkage deformation of cement alkali activated gradient structured composite in complex environments with temperature humidity changes |
| topic | gradient-structured composite alkali-activated mortar temperature difference cycling wet-dry cycling shrinkage strain splitting strength |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2025.1527502/full |
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