Modelling of autogenous healing in Ultra High Performance Concrete

Benoit Hilloulin (1) , Frederic Grondin (1) , M. Matallah (2) , Ahmed Loukili (1)

1 GeM - Institut de Recherche en Génie Civil et Mécanique
2 Université Aboubekr Belkaid - University of Belkaïd Abou Bekr [Tlemcen]

The restoration of ultra high performance concrete (UHPC) specimens due to the self-healing phenomenon was investigated in this paper. A hydro-chemo-mechanical model based on micro-mechanical observations was established. The aim was to evaluate the mechanical properties of the new healing products in order to describe the partial recovery of the mechanical properties of healed concrete. An analysis of the influence of some physical parameters provided first explanations about the self-healing phenomenon. It was shown that the mechanical properties of CSH in the healed crack are lower than the ones of the virgin material.

Mots clés: Self-healing; Modelling; Mechanical properties; Calcium-Silicate-Hydrate (C-S-H); Characterization

Domaines: Mécanique des matériaux [physics.class-ph]; Construction durable

Benoit Hilloulin, Frederic Grondin, M. Matallah, Ahmed Loukili. Modelling of autogenous healing in Ultra High Performance Concrete. Cement and Concrete Research, 2014, 61-62, pp.64-70. ⟨10.1016/j.cemconres.2014.04.003⟩. ⟨hal-03562242⟩