Abstract
Cracking is inevitable during the service period of concrete structures. They are preferential ingression channels for aggressive ions. It is difficult or even impossible to repair all the cracks due to the limitation of practical conditions. However, cracks have potentials to self-heal due to further hydration and carbonization. The effect of autogenous self-healing on the properties of cementitious materials has been studied experimentally by many researchers. However, researches on modelling of the autogenous self-healing processes are still limited. In this paper, a Lattice Boltzmann single component model is proposed to simulate the self-healing caused by further hydration in cement paste matrix at mesoscale. The model simulates not only the healing efficiency but also the geometry change. The simulation result shows that even when the filling efficiency is low, some locations in the crack could be completely blocked. This may lead to lower effective diffusion coefficient of ions via the cracked sample.
Original language | English |
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Article number | 105782 |
Number of pages | 9 |
Journal | Cement and Concrete Research |
Volume | 123 |
DOIs | |
Publication status | Published - 2019 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Keywords
- Autogenous self-healing
- Further hydration
- Geometry change
- Lattice Boltzmann Method
- Nucleation probability distribution