Experimental and numerical investigation on the irregularity of carbonation depth of concrete under supercritical condition

Bao, H. and Yu, M. and Ye, J. and Xu, L. and Chi, Y. and Ye, J. (2018) Experimental and numerical investigation on the irregularity of carbonation depth of concrete under supercritical condition. In: 6th International Conference on Durability of Concrete Structures, ICDCS 2018. 6th International Conference on Durability of Concrete Structures, ICDCS 2018 . Whittles Publishing Limited, GBR, pp. 367-375. ISBN 1849953945

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Abstract

The heterogeneity of a cement-based material results in a random spatial distribution of carbonation depth, which may significantly affect the mechanical properties and durability of the material. Currently, there is a lack of both experimental and numerical investigations aiming at a statistical understanding of this important phenomenon. This paper presents both experimental and numerical supercritical carbonation results of concrete blocks. The random fields of porosity and two-dimension random aggregate model of concrete were proposed for the simulation. The carbonation depths are measured and distributed along the carbonation boundary by the proposed rapid image processing technique, which are then statistically studied. The study has shown that considering the random distribution of coarse aggregates and using a random field of porosity with due consideration of spatial correlation and variance, the irregularity of carbonation depth can be realistically captured by the numerical model. Overall the methodology adopted in the paper can provide a foundation for future investigations on probability analysis of carbonation depth and other similar work based on multi-scale and-physics modelling.

Item Type:
Contribution in Book/Report/Proceedings
Additional Information:
Funding Information: The authors are grateful for the financial support Funding Information: from the National Key Research and Development Program of China (2016YFC0701400). Publisher Copyright: © ICDCS 2018. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2215
Subjects:
ID Code:
151893
Deposited By:
Deposited On:
09 Jun 2021 16:30
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Jun 2021 05:18