Prediction of effective diffusion coefficient of concrete based on multiscale approach

Authors: Lin Liu, Wei Sun, Huisu Chen, Guang Ye
Paper category: conference
Book title: Concrete Durability and Service Life Planning – ConcreteLife’09
Editor(s): K. Kovler
Print ISBN: 978-2-35158-074-5
e-ISBN: 978-2-35158-085-1
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 423 – 431
Total Pages: 9
Language: English

Abstract: In durability design and service life predictions of reinforced concrete subjected to chloride environment, the prediction of chloride diffusion coefficient is highly required. Based on the idea that macro-properties of a composite material are strongly dependent on its microstructure, a quantitative analytical model is developed to correlate macro-diffusivity in concrete with its microstructure. In this study, concrete is considered as a heterogeneous multiphase material, and the effective diffusion coefficient of concrete is predicted by a multiscale approach. Homogenization methods are used to bridge the two adjacent scales. From micro-to-meso scale, self consistent approximation and general self-consistent scheme (GSCS) are used to predict the effective diffusion coefficient of cement paste. From meso-tomacro scale, GSCS is used to predict the effective diffusion coefficient of concrete. After verification based on experimental data in literature, it was found that this multi-scale approach has reasonable accuracy.

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00