| Issue |
MATEC Web Conf.
Volume 163, 2018
MATBUD’2018 – 8th Scientific-Technical Conference on Material Problems in Civil Engineering
|
|
|---|---|---|
| Article Number | 02001 | |
| Number of page(s) | 8 | |
| Section | Modeling of Concrete Behavior and Test Methods | |
| DOI | https://doi.org/10.1051/matecconf/201816302001 | |
| Published online | 15 June 2018 | |
Influence of tensile cracking and of aggregate size on concrete permeability
1
Institut de Recherche en Génie Civil et Mécanique GeM - UMR CNRS 6183, Université Bretagne Loire, Université de Nantes, IUT Saint Nazaire, 58 rue Michel Ange, 44600 Saint-Nazaire, France
2
Missan University, Engineering College, Iraq
* Corresponding author: Marta.Choinska@univ-nantes.fr
The aim of this study is to investigate the interaction between crack opening (COD), aggregate size and gas transfer in concrete submitted to mechanical loading in the Brazilian splitting tensile test. The lab-made devices have been developed to investigate physical phenomena during loading and to provide data to validate a developed mesoscale hydromechanical model by the same authors, based upon a 3D lattice approach to represent the heterogeneity of the material [1]. Experimental studies has been carried out on five materials with different aggregate sizes. The results emphasize that permeability of mortar increases with cracking following a sigmoid law, with the most important kinetics due to passingthrough connected crack growth, after nonsymmetric one-face crack initiation. Furthermore, the obtained results highlight that permeability increase, due to aggregate size, may be separated from permeability increase due to tensile cracking: for all the five materials tested results fall on the same master sigmoid curve. This behaviour law represents a strong advantage for concrete modelling.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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