Determination of durability of mortar with slag exposed to bacterial environment

Construmat 2018

Smolakova, M.^1 ; Estokova, A.^1 ; Vaclavik, V.^2 ; Soucek, K.^3 ; Zajicova, V.^3

Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, Kosice

042 00, Slovakia^1

Institute of Environmental Engineering, Faculty of Mining and Geology, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, Ostrava-Poruba

708 33, Czech Republic^2

Institute of Geonics of the CAS, Studentska 1768, Ostrava-Poruba

708 00, Czech Republic^3

关键词: Cement based material;    Cement composite;    Cementitious materials;    Fluid permeability;    Material science;    Water absorbability;    Water/binder ratios;    X-ray computed tomography;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/385/1/012052/pdf
DOI  :  10.1088/1757-899X/385/1/012052

来源: IOP

【 摘 要 】

Leaching of cement based materials and dissolution of cement hydrates under biogenic acid attack result in an increase of the porosity and changes in the pore structure of the building materials. The impact of certain physicochemical concrete/mortar parameters such as cement chemistry, water/binder (w/b) ratio, porosity and fluid permeability of cementitious materials has been recognized from a material sciences perspective. In this work the durability of cement composite made with blast furnace slag exposed to sulphur oxidizing bacteria A. thiooxidans during the period of 12 months was investigated. Leaching of calcium and silicon ions, water absorbability and porosity of the slag based composite using X-ray computed tomography was evaluated.