T0101-4-6 Digital-Image-Based Simulation for Compressive Strength Prediction of Hardened Cement Pastes

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  • T0101-4-6 セメントペースト硬化体のイメージベース圧縮強度解析([T0101-4]マイクロ・ナノ材料システムの力学と強度・機能評価(4):先端複合材料の強度・機能評価)

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To predict the macroscopic compressive strengths of hardened cement paste, a digital-image-based finite element procedure for damage evolution due to local tension is developed and its applicability from practical viewpoint is studied through numerical experiments. In the procedure, microscopic three-dimensional geometries of hardened cement paste are assumed to be periodic and each phase is randomly generated by using auto-correlation function evaluated from a two-dimensional SEM image of specimen. Nonlocal isotropic damage model is employed to represented crack evolutions in the geometries. Predicted macroscopic uni-axial compressive strengths are qualitatively consistent with experimental results in terms of water-cement ratio and material age.

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