Influence of Frost Damage on Performance of Engineered Cementitious Composites

IF 1.6 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Advanced Concrete Technology Pub Date : 2023-12-05 DOI:10.3151/jact.21.971
Lanqin Wang, Xiaofeng Han, Li Tian, Penggang Wang, Xiaoguang Sun
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Abstract

Although engineered cementitious composites (ECC) exhibit tensile strain hardening and multiple microcracking characteristics, whether the performance of ECC changes obviously under freezing-thawing conditions is important for the design and maintenance of buildings in the areas with freeze-thaw exposure. Results indicates that, as the number of freeze-thawing cycles increase, the PVA fiber/matrix interfacial bonding strength decreases, more fibers can be pulled out, thereby resulting in an increasing deformation on ECC. The results of water capillary absorption, chloride penetration and carbonation on ECC reveal that the frost damage has little effect on ECC. In addition, the steel bar-normal concrete interfacial ultimate bonding strength decreases linearly with the increase in the number of freeze-thawing cycles, the specimen splits failure. However, for the ECC, the steel bar-ECC interfacial ultimate bonding strength decreases with the increase in the number of freeze-thawing cycles, the pull-out failure occurs.

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冻害对工程胶凝复合材料性能的影响
尽管工程胶凝复合材料(ECC)表现出拉伸应变硬化和多重微裂缝的特征,但在冻融条件下,ECC的性能是否发生明显变化,对冻融暴露地区建筑的设计和维护具有重要意义。结果表明,随着冻融循环次数的增加,PVA纤维/基体界面结合强度降低,更多的纤维被拉出,从而导致ECC上的变形增大。水毛细吸收、氯离子渗透和碳化作用结果表明,冻害对ECC影响不大。此外,随着冻融循环次数的增加,钢筋-普通混凝土界面的极限粘结强度呈线性降低,试件发生劈裂破坏。然而,对于ECC,随着冻融循环次数的增加,钢筋-ECC界面的极限结合强度降低,出现拉出破坏。
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来源期刊
Journal of Advanced Concrete Technology
Journal of Advanced Concrete Technology 工程技术-材料科学:综合
CiteScore
3.70
自引率
10.00%
发文量
45
审稿时长
3.5 months
期刊介绍: JACT is fast. Only 5 to 7 months from submission to publishing thanks to electronic file exchange between you, the reviewers and the editors. JACT is high quality. Peer-reviewed by internationally renowned experts who return review comments to ensure the highest possible quality. JACT is transparent. The status of your manuscript from submission to publishing can be viewed on our website, greatly reducing the frustration of being kept in the dark, possibly for over a year in the case of some journals. JACT is cost-effective. Submission and subscription are free of charge . Full-text PDF files are available for the authors to open at their web sites. Scope: *Materials: -Material properties -Fresh concrete -Hardened concrete -High performance concrete -Development of new materials -Fiber reinforcement *Maintenance and Rehabilitation: -Durability and repair -Strengthening/Rehabilitation -LCC for concrete structures -Environmant conscious materials *Structures: -Design and construction of RC and PC Structures -Seismic design -Safety against environmental disasters -Failure mechanism and non-linear analysis/modeling -Composite and mixed structures *Other: -Monitoring -Aesthetics of concrete structures -Other concrete related topics
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