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本文主要研究钢纤维增强混凝土的界面特征。文章就基体中掺入不同类型、不同掺量的聚合物和减水剂,及改变水灰比,对改善界面结构,增强界面过渡层及其最薄弱点,提高界面粘结强度和刚度纤维拔出时所做的功和界面裂缝前沿临界能量释放率等,进行了分析和研究。研究结果表明,改变界面组成与结构,促使钢纤维与混凝土结成一体,是提高这类材料增强增韧效率的有效技术途径。
This paper mainly studies the interface characteristics of steel fiber reinforced concrete. The article incorporates different types and amounts of polymers and water-reducing agents in the matrix and changes the water-cement ratio to improve the interfacial structure, enhance the interfacial transition layer and its weakest point, and increase the interfacial bond strength and stiffness. The work done and the critical energy release rate at the front edge of the interface cracks were analyzed and studied. The research results show that changing the composition and structure of the interface to promote the integration of steel fibers and concrete is an effective technical approach to increase the toughening efficiency of these materials.