Micro- and macro mechanical characterization of contact zones (ITZ) in recycled concrete and development of a multi-scale approach model (MiMaCMo)

再生混凝土接触区 (ITZ) 的微观和宏观力学表征以及多尺度方法模型 (MiMaCMo) 的开发

• 批准号: 500729359
• 负责人: Professorin Dr.-Ing. Luise Göbel
• 金额: --
• 依托单位: Materialforschungs- und Prüfanstalt (MFPA)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/500729359?language=en
• 关键词: Micro; macro; mechanical; characterization; contact

The approach of the proposed project is to combine the latest analytical methods (high-resolution, tomographic, electron microscopic analysis, laser ablation, and nanoindentation) and micromechanical modeling. This makes it possible to investigate the mechanical properties, structure, and phase composition of the interfacial transition zone (ITZ) as a function of various parameters in a completely new quality. The experimental results obtained find direct input into the micromechanical modeling. This combined approach makes it possible to fundamentally understand the properties of R-concretes and make them predictable. From the information obtained, conclusions can be drawn on the influences of various properties of the recycled aggregates on the formation of the ITZ and on better preparation and pre-treatment of the aggregate. Based on the microstructural findings, it should be possible to explain variations in the macroscopic material behavior of the concretes. The experimental work forms the basis, as a result of which a multi-scale modelling approach is to be developed. In contrast to empirical approaches, which have to be recalibrated for different materials, multi-scale modeling allows for more general application to different types of R-concrete.

拟议项目的方法是联合收割机结合最新的分析方法（高分辨率，断层扫描，电子显微镜分析，激光烧蚀和纳米压痕）和微观力学建模。这使得研究界面过渡区（ITZ）的机械性能、结构和相组成作为各种参数的函数成为可能。获得的实验结果发现直接输入到微机械建模。这种结合的方法使人们有可能从根本上了解R-混凝土的性能，并使它们可预测。从所获得的信息，可以得出结论的各种性能的再生骨料的ITZ的形成和更好的准备和预处理的骨料的影响。基于微观结构的研究结果，应该可以解释混凝土的宏观材料行为的变化。实验工作形成的基础上，作为一个多尺度建模方法的结果是要开发。相反，经验的方法，必须重新校准不同的材料，多尺度建模允许更一般的应用程序，以不同类型的R-混凝土。