Review of Multiscale Characterization Techniques and Multiscale Modeling Methods for Cement Concrete: From Atomistic to Continuum

摘要

Due to the heterogeneous composite nature of cement concrete, it is vital to understand the structure and mechanical properties from nanoscale to macroscale. Therefore, it is essential to utilize microscopy techniques to characterize the microstructure of cement concrete and to develop low-cost and computational effective multiscale modeling methods. This paper presents a brief review of different microscopy techniques for the microstructure characterization of cement concrete, and then three widely used multiscale modeling methods are discussed, including quasi-continuum method, coarse-grained molecular dynamics (CGMD) method and hand-shake method. Finally, a short discussion on multiscale failure modeling of cement concrete is presented as an example for the multiscale failure modeling of cement concrete.