Durability Ⅴ

[1131] SIMULATION ON WATER ABSORPTION BEHAVIOR OF ECC MATERIAL WITH DIFFERENT CRACK DENSITY AND DISTRIBUTION

Yao LUAN¹, Tetsuya ISHIDA² (1.埼玉大学 2.東京大学)

Keywords:crack density, crack distribution, ECC, multi-scale modeling, Water absorption, 吸水, ECC, ひび割れ密度, ひび割れ分布, マルチスケール解析

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In this study, using a two-phase absorption model, water absorption behavior of ECC with different crack density and distribution are simulated. It is found that higher crack density causes faster absorption and larger absorbed water amount. This is because that cracks become convenient channels for water ingression into cement matrix. Besides, for ECC with severe cracking, cracks are not uniformly distributed but localized in some areas, which causes different water distribution in the absorption. In the analysis, such a process can be reasonably simulated by two dimensional analysis.