Enhancing wood fire resistance through magnesium-ion-induced calcium carbonate mineralization

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

Construction and Building Materials Pub Date : 2025-03-31 DOI:10.1016/j.conbuildmat.2025.141069

Jinzhuo Huang , Jing Liu , Shenghui Lai , Da Liu , Zebin Deng , Tao Yang , Guangming Yuan

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引用次数: 0

Abstract

Wood, as an abundant and sustainable material, is highly regarded for its aesthetic appeal and versatility, making it a popular choice for architectural and furniture applications. Nevertheless, its high flammability presents a major safety hazard, severely restricting its use in fire-prone settings. In this work, we focus on extending the time to ignition (TTI) of wood by increasing the delay between contact with an ignition source and the formation of an open flame, rather than merely reducing the heat release rate (HRR) and smoke release rate (SRR) during combustion. This study investigates how magnesium ions (Mg²⁺) promote the mineralization of CaCO₃ within wood, leading to the formation of magnesium calcium carbonate (Mg-CaCO₃) and magnesium calcite. During wood combustion, Mg-CaCO₃ underwent dehydration and phase transformation, promoting the nucleation and growth of Mg-calcite within the wood matrix. This process markedly enhanced the wood's fire-retardant properties and compressive strength. Compared to untreated wood, the mineralized wood demonstrated a 53 s delay in TTI, a 68.8 % reduction in the maximum heat release rate (HRR), and a 101.7 % increase in compressive strength. The facile self-densification and heat-induced mineralization processes, combined with a water evaporation strategy, significantly enhance both the fire-retardant properties and mechanical strength, offering a promising approach for the development of fire-resistant, high-strength structural materials.

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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.