Bojian Zhang , Ying Xiong , Shuang Liu , Xianbing Wang , Haibing Yan
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引用次数: 0
Abstract
The efficacy of cement matrix mechanical properties is significantly influenced by the strength of interfacial bonding between reinforcement material and cement. In this investigation, we explored the enhancement of CaCO3 whisker reinforced cement via the grafting of a SiO2 layer onto the CaCO3 whisker surface using the condensation and polymerization of ethyl orthosilicate (TEOS). Characterization of the CaCO3@SiO2 whisker structure and surface micro-topography was conducted utilizing FTIR, XPS, AFM, and SEM techniques. Furthermore, the impact of CaCO3@SiO2 whisker on the mechanical properties of the cement matrix was examined, and the mechanism underlying the reinforcement of the cement matrix by CaCO3@SiO2 whisker, along with the micro-scale interfacial structure between CaCO3 whisker and cement matrix, was elucidated through SEM, EDS, and BSEM analyses. The findings revealed that the SiO2 layer grafted on CaCO3 whisker facilitated a reaction with Ca(OH)2, resulting in the generation of additional cement hydration products, and tightly enveloping the CaCO3 whisker with hydration products. The crosslinking action of silicate chains led to the formation of a denser adhesion and stronger interfacial bonding between CaCO3 whisker and cementitious matrix, thereby enhancing the mechanical properties of the cement containing CaCO3@SiO2 whisker.
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.