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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of Supplementary Cementitious Materials on the Autogenous Self-Healing of Cracks in Cementitious Materials
Author(s): Imane Salama, Benoît Hilloulin, Sonagnon Medjigbodo and Ahmed Loukili
Publication: Special Publication
Appears on pages(s): 12.1-12.14
Keywords: Blast furnace slag, metakaolin, permeability recovery, recovery of mechanical properties, self-healing, SEM/EDX
Abstract:The natural, e.g. autogenous, healing capacity of cementitious materials in concrete is a promising path to
overcome the ecological problems and durability preoccupations inherent to civil engineering. But, recovery of
mechanical from autogenous healing are due to ongoing hydration reactions highly dependent on the binder. In this
study, the healing potential of different mixtures incorporating supplementary cementitious materials is discussed
both from a mechanical and a permeability point of view. Mortars with a 25% cement mass substitution ratio by
metakaolin or blast furnace slag were compared to reference ones. Healing performances were quantified after
cracking at early age using three-point-bending tests. Recovery in mechanical properties were calculated from
reloading curves while permeability recovery was estimated using a novel air permeability device. It appears that the
blast furnace slag mixture exhibits very good performance compared to the reference and the one including
metakaolin is relatively close to the reference.
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