Enhanced interfacial bonding performance through novel stranded steel fibers in PVA-ECC: Experimental and theoretical analysis

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-05-10 DOI:10.1016/j.conbuildmat.2025.141711

Juntao Zhu , Ziyuan Li , Kai Zhang , Hu Feng , Jiajun Fan , Ke Li

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引用次数: 0

Abstract

Stranded-shaped materials might be an alternative reinforced fiber for hybrid fiber-reinforced cementitious composites due to their outstanding pullout resistance. This study introduced a novel PVA-stranded steel hybrid fiber-reinforced composite (PSHFRC). Experimental and analytical investigations studied the interfacial properties of stranded steel (SS) fiber and PVA fiber-reinforced matrices, as well as the mechanical performance of PSHFRC. The findings revealed the bond strength of SS fiber in the matrix was approximately 2.06 and 4.80 times greater than that of hooked-end and straight fibers, respectively. In comparison to hybrid fiber-reinforced cementitious composites using hooked-end fibers and PVA fibers, the PSHFRC produced shows a 95 % improvement in tensile strength and a 168 % increase in tensile strain under similar conditions. An analytical model was suggested to characterize the interfacial mechanical properties between SS fiber and matrices. Validation results demonstrated that this model is applicable for characterizing the interfacial properties between SS fiber and matrices. This research highlights the practical benefits of using stranded-shaped materials in hybrid fiber-reinforced cementitious composites, demonstrating their potential to improve mechanical performance of construction materials.

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新型绞合钢纤维增强PVA-ECC的界面结合性能：实验与理论分析

股状材料具有优异的抗拉性能，有望成为混杂纤维增强胶凝复合材料的一种替代增强纤维。介绍了一种新型聚乙烯醇绞线钢混杂纤维增强复合材料（PSHFRC）。试验和分析研究了钢绞线（SS）纤维和PVA纤维增强基体的界面性能以及PSHFRC的力学性能。结果表明，SS纤维在基体中的结合强度分别比钩端纤维和直端纤维高约2.06倍和4.80倍。与使用钩端纤维和PVA纤维的混杂纤维增强胶凝复合材料相比，在相同条件下，生产的PSHFRC的抗拉强度提高了95 %，拉伸应变提高了168 %。提出了一种表征纤维与基体界面力学性能的解析模型。验证结果表明，该模型可用于表征SS纤维与基体之间的界面特性。这项研究强调了在混杂纤维增强胶凝复合材料中使用绞状材料的实际好处，展示了它们改善建筑材料机械性能的潜力。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.