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

3rd International Conference on Innovative Materials, Structures and Technologies

Estokova, A.^1 ; Smolakova, M.^1 ; Luptakova, A.^2 ; Strigac, J.^3

Technical University of Kosice, Faculty of Civil Engineering, Institute of Environmental Engineering, Kosice, Slovakia^1

Institute of Geotechnics, Slovak Academy of Science, Kosice, Slovakia^2

Cement Plant, Povazska Cementaren, a.s., Ladce, Slovakia^3

关键词: Absorptivities;    Cement composite;    Corrosion control;    Degradation process;    Granulated blast furnace slag;    Mechanical and physical properties;    Mineral admixtures;    Water absorptivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012034/pdf
DOI  :  10.1088/1757-899X/251/1/012034

来源: IOP

【 摘 要 】

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.