Bond properties and predictive modeling of steel reinforcement and steel fiber reinforced concrete (SFRC) under chloride ion attack

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-06-12 DOI:10.1016/j.conbuildmat.2025.142207

Haotian Liu , Lin Yang , Zongze Li , Dong Fang , Guowen Sun , Ying Li , Danying Gao

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引用次数: 0

Abstract

This study systematically reveals the evolution of bond-slip properties between steel reinforcement and steel fiber reinforced concrete (SFRC) under chloride ion erosion. It quantifies the crack-suppressing effect of fibers in concrete and the deteriorating effect of corrosion-induced expansion, establishing a mapping relationship between water-cement ratio (0.3 −0.5), steel fiber content (0 −1.5 %), and bond strength. Results show an optimal range for steel fiber content in chloride environments. After corrosion, specimens with 0 %, 0.5 %, 1.0 %, and 1.5 % steel fibers exhibited bond strength changes of −99.2 %, + 5.6 %, + 19.7 %, and −13.2 %, respectively. Reducing the water-cement ratio effectively improves reinforcement-SFRC bonding and inhibits performance deterioration in corrosive environments. Additionally, an evolution and prediction model for rebar-SFRC bonding performance was developed, incorporating chloride corrosion time. This study provides a quantitative basis for durability design and life prediction of SFRC structures in offshore engineering, particularly in optimizing steel fiber dosage and water-cement ratio control, offering significant engineering guidance value.

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钢筋与钢纤维混凝土（SFRC）在氯离子侵蚀下的粘结性能及预测建模

本研究系统地揭示了氯离子侵蚀作用下钢筋与钢纤维混凝土（SFRC）粘结滑移性能的演变规律。量化了纤维在混凝土中的抗裂作用和腐蚀膨胀的恶化作用，建立了水灰比（0.3 −0.5）、钢纤维含量（0 −1.5 %）和粘结强度之间的映射关系。结果表明，在氯化物环境中，钢纤维含量的最佳范围。腐蚀后,标本与0 % 0.5 %, % 1.0和1.5 %钢纤维表现出粘结强度的变化−99.2 % +  % 5.6 + 19.7  %,分别和−13.2 %。降低水灰比可有效改善钢筋- sfrc粘结，抑制腐蚀环境下性能的恶化。此外，建立了考虑氯化物腐蚀时间的钢筋-钢纤维混凝土粘结性能演化与预测模型。本研究为海洋工程中SFRC结构的耐久性设计和寿命预测，特别是钢纤维掺量优化和水灰比控制提供了定量依据，具有重要的工程指导价值。

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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.