Sijia Liu, Long Yu, Biwan Xu, Ken Yang, Shunfeng Wang, Linglin Xu, Zhenghong Yang
{"title":"硫铝酸钙水泥基工程水泥基复合材料(CSA-ECC)在车桥耦合振动下的抗破坏性","authors":"Sijia Liu, Long Yu, Biwan Xu, Ken Yang, Shunfeng Wang, Linglin Xu, Zhenghong Yang","doi":"10.1617/s11527-024-02398-8","DOIUrl":null,"url":null,"abstract":"<p>The performance damage of newly placed concrete caused by vehicle–bridge coupling vibration is an inevitable phenomenon among widening of existing concrete bridge. Calcium sulfoaluminate cement-based engineered cementitious composite (CSA–ECC) was proposed to replace the conventional concrete to address the aforementioned issues. The effects of vehicle–bridge coupled vibration (involve the frequency and the amplitude) on the mechanical properties of CSA–ECC including compressive strength, flexural strength and flexural toughness were investigated. The distribution of air bubbles was analyzed by X-ray micro-computed tomography (X-ray CT) to explore the mechanism of vibration affecting the mechanical properties of CSA–ECC. The results indicate that the volume percentage of coarse air bubbles (>1.0 mm<sup>3</sup>) decreases from 54.70 to 25.94%, and the volume percentage of micro air bubbles (0–0.2 mm<sup>3</sup>) increases from 30.89 to 54.19%. As a result, the microstructure of matrix and fiber/matrix interface are densified due to the redistribution of air bubbles caused by the coupling vibration. Therefore, the application of vibration significantly enhances the flexural strength and flexural toughness of CSA–ECC, ascribing to stronger matrix fracture toughness and fiber/matrix interfacial frictional bond. These indicate that the CSA–ECC has a promising application scenario in highway bridge widening projects with exceptional vibration-induced damage resistance ability.</p>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Damage resistance of calcium sulfoaluminate cement-based engineered cementitious composite (CSA–ECC) under vehicle-bridge coupling vibration\",\"authors\":\"Sijia Liu, Long Yu, Biwan Xu, Ken Yang, Shunfeng Wang, Linglin Xu, Zhenghong Yang\",\"doi\":\"10.1617/s11527-024-02398-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The performance damage of newly placed concrete caused by vehicle–bridge coupling vibration is an inevitable phenomenon among widening of existing concrete bridge. Calcium sulfoaluminate cement-based engineered cementitious composite (CSA–ECC) was proposed to replace the conventional concrete to address the aforementioned issues. The effects of vehicle–bridge coupled vibration (involve the frequency and the amplitude) on the mechanical properties of CSA–ECC including compressive strength, flexural strength and flexural toughness were investigated. The distribution of air bubbles was analyzed by X-ray micro-computed tomography (X-ray CT) to explore the mechanism of vibration affecting the mechanical properties of CSA–ECC. The results indicate that the volume percentage of coarse air bubbles (>1.0 mm<sup>3</sup>) decreases from 54.70 to 25.94%, and the volume percentage of micro air bubbles (0–0.2 mm<sup>3</sup>) increases from 30.89 to 54.19%. As a result, the microstructure of matrix and fiber/matrix interface are densified due to the redistribution of air bubbles caused by the coupling vibration. Therefore, the application of vibration significantly enhances the flexural strength and flexural toughness of CSA–ECC, ascribing to stronger matrix fracture toughness and fiber/matrix interfacial frictional bond. These indicate that the CSA–ECC has a promising application scenario in highway bridge widening projects with exceptional vibration-induced damage resistance ability.</p>\",\"PeriodicalId\":691,\"journal\":{\"name\":\"Materials and Structures\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-06-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials and Structures\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1617/s11527-024-02398-8\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials and Structures","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1617/s11527-024-02398-8","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Damage resistance of calcium sulfoaluminate cement-based engineered cementitious composite (CSA–ECC) under vehicle-bridge coupling vibration
The performance damage of newly placed concrete caused by vehicle–bridge coupling vibration is an inevitable phenomenon among widening of existing concrete bridge. Calcium sulfoaluminate cement-based engineered cementitious composite (CSA–ECC) was proposed to replace the conventional concrete to address the aforementioned issues. The effects of vehicle–bridge coupled vibration (involve the frequency and the amplitude) on the mechanical properties of CSA–ECC including compressive strength, flexural strength and flexural toughness were investigated. The distribution of air bubbles was analyzed by X-ray micro-computed tomography (X-ray CT) to explore the mechanism of vibration affecting the mechanical properties of CSA–ECC. The results indicate that the volume percentage of coarse air bubbles (>1.0 mm3) decreases from 54.70 to 25.94%, and the volume percentage of micro air bubbles (0–0.2 mm3) increases from 30.89 to 54.19%. As a result, the microstructure of matrix and fiber/matrix interface are densified due to the redistribution of air bubbles caused by the coupling vibration. Therefore, the application of vibration significantly enhances the flexural strength and flexural toughness of CSA–ECC, ascribing to stronger matrix fracture toughness and fiber/matrix interfacial frictional bond. These indicate that the CSA–ECC has a promising application scenario in highway bridge widening projects with exceptional vibration-induced damage resistance ability.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.