Synthesis of waste glass-derived silica nanoparticle and its role in anti-corrosion via a designed double-layered structure under chloride attack

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

Construction and Building Materials Pub Date : 2025-03-04 DOI:10.1016/j.conbuildmat.2025.140598

Zuhua Xu , Zhaoyang Sun , Yuyang Zhao , Zongjin Li , Binmeng Chen

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引用次数: 0

Abstract

Due to the ultralow chemical reactivity, direct use of waste glass (WG) in concrete leads to alkali-silica reaction (ASR) between silica and alkaline after hardening, causing volume expansion and internal cracks and limiting its use in reinforced concrete significantly. To tackle this issue, highly reactive nano silica was synthesized from waste glass. However, challenges, such as pH reduction and compromised chloride (Cl⁻) binding capacity, accelerated the corrosion of steel. In this study, we proposed waste glass-derived nano silica (WG-NS) modified cement paste with double-layered structure to mitigate the pH and Cl^- binding capacity issue. Results indicated that the synthesized waste glass-derived nano silica (WG-NS) was with ultrahigh purity of 98 %wt. SiO₂, specific surface area of approximately 400 m²/g, and high negative zeta potential of −31 mV. Notably, the R-Si (Inner layer: Unmodified cement paste & Outer layer: WG-NS modified cement paste) double-layered structure exhibited the lowest Cl⁻ diffusion rate among the tested samples after Cl⁻ exposure. Consequently, the embedded steel showed the lowest corrosion rate of 0.25 µA/cm² and the highest charge transfer resistance (Rct) of 7.3 kΩ, remaining passivated after exposure. Additionally, only about 1 % of Fe₂O₃ (corrosion product) was found on the steel, which was the least.

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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.