页岩陶粒混凝土细观参数及损伤演化研究

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中图分类号: TB9; TU528.2 文献标志码: A文章编号: 1674–5124(2025)05–0027–07
Abstract: As the elastic parameters of light aggregates are difficult to obtain, it is difficult for the microscopic numerical simulation of lightweight concrete to truly reflect the material properties. Therefore, this study took shale ceramics concrete as the research object, analyzed the volume fraction of the interfacial transition zone, proposed an inversion method for the micro phase parameters of shale ceramics, and performed a numerical simulation of shale ceramics concrete. The results showed that the volume fraction of the interfacial transition zone was relatively small and the contribution to the elastic modulus of shale ceramics concrete could be neglected. Shale ceramic were weak phase in concrete with elastic modulus and strength of 12.1MPa and 21.2MPa , respectively. The damage evolution process of shale ceramic concrete could be divided into four stages. The generation and expansion of cracks started from the shale ceramics and extended to the mortar matrix, which eventually made the shale ceramics concrete exhibit a diagonal shear damage pattern. This study can provide a theoretical basis and research methods for the engineering application and safety evaluation of light-aggregate concrete.
Keywords: light-aggregate concrete; shale ceramsite; microscopic; damage evolution; numerical simulation
0 引 言
普通混凝土自重大、脆性大等缺点凸显,轻质、高强、高性能、多功能材料成为现代工程需求的方向。(剩余8583字)