Changes in water absorptivity of slag based cement mortars exposed to sulphur-oxidising A. thiooxidans bacteria

Water absorptivity is heavily influenced by the volume and connectivity of pores in the pore network of cement composites and has been used as an important parameter for quantifying their durability. To improve the durability and permeability of mortars, various mineral admixtures such as furnace sl...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-10, Vol.251 (1), p.12034
Main Authors: Estokova, A, Smolakova, M, Luptakova, A, Strigac, J
Format: Article
Language:English
Subjects:
Absorptivity
Admixtures
Bacteria
Blast furnace slags
Corrosion prevention
Durability
Fly ash
Granulation
Mortars (material)
Physical properties
Silica fume
Silicon dioxide
Slag
Sulfur
Workability
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Summary:Water absorptivity is heavily influenced by the volume and connectivity of pores in the pore network of cement composites and has been used as an important parameter for quantifying their durability. To improve the durability and permeability of mortars, various mineral admixtures such as furnace slag, silica fume or fly ash are added into the mortar and concrete mixtures. These admixtures provide numerous important advantages such as corrosion control, improvement of mechanical and physical properties and better workability. This study investigated the changes in absorptivity of cement mortars with different amounts of mineral admixture, represented by granulated blast furnace slag, under aggressive bacterial influence. The water absorptivity of mortars specimens exposed to sulphur-oxidising bacteria A. thiooxidans for the period of 3 and 6 months has changed due to bio-corrosion-based degradation process. The differences in water absorptivity in dependence on the mortars composition have been observed.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/251/1/012034