TRENDS OF Co AND Mn LEACHING FROM SLAG MORTARS

Various corrosive agents affect and deteriorate the concrete whereas a release of major components as well as trace elements including heavy metals occurs. Microorganisms tend to colonize solid surfaces in natural environment by forming biofilm as a protective layer, and reducing that the exposure of the solid surface to the external environment. However, biofilm formation could also result in localized corrosion and deterioration of the substratum materials, such as mortars and concrete. Bio corrosion contributes significantly to a deterioration of the concrete structure. The paper aims at investigation of leaching the selected trace metals (cobalt and manganese), from cement mortars of different compositions, during a 180-day bacterial exposure.

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[1]  Hohberg I. Charakterisierung, Modellierung und Bewertung des Auslaugverhaltens umweltrelevanter, anorganischer Stoffe aus zementgebundenen Baustoffen/ Characterization, modelling and assessment of the leaching behaviour of environmentally relevant inorganic compounds from cement based building materials. Deutscher Ausschuss für Stahlbeton. Wilhelm Ernst & Sohn, Is. 542, 2003.

[2]  Müllauer W., Beddoe R.E., Heinz D. Leaching behaviour of major and trace elements from concrete: effect of fly ash and GGBS. Cement and Concrete Composites. Vol. 58. pp. 129-139, 2015.

[3]   Magistri M., Recchi P. and Bravo A. Parameters Influencing The Leachability of Antimony From Hardened Concrete. 2013.

[4]  Achternbosch, M. et al.: Heavy metals in cement and concrete resulting from the co-incineration of wastes in cement kilns with regard to the legitimacy of waste utilisation. Karlsruhe: Forschungszentrum Karlsruhe GmbH 2003.

[5]  Reference Documents on Best Available Techniques in the Cement, Lime and Magnesium Oxide Manufac-turing Industries [online]. In: European Commission: May 2010. ftp://ftp.jrc.es/pub/eippcb/doc/clm_bref_0510.pdf

[6]  Van der Sloot H.A.  Comparison of the characteristic leaching behavior of cements using standard (EN 196-1) cement mortar and an assessment of their long-term environmental behavior in construction products during service life and recycling. Cement and Concrete Research Vol. 30. No 7 pp. 1079-1096, 2000.

[7]  Yoshida N., Morinaga T., Murooka, Y. Characterization and identification of bacterial strains isolated from corroded concrete in the accumulation stratum and their resistance levels to heavy metals. Journal of fermentation and bioengineering Vol. 76. No. 5 pp. 400-402, 1993.

[8]  Jensen H.S., Nielsen A.H., Hvitved-Jacobsen T., Vollertsen J. Survival of hydrogen sulfide oxidizing bacteria on corroded concrete surfaces of sewer systems. Water Science and Technology Vol. 57. No. 11 pp. 1721-1726, 2008.

[9]  Kelly D.P., Wood A.P. Reclassification of some species of Thiobacillus to the newly designated genera Acidithiobacillus gen. nov., Halothiobacillus gen. nov. and Thermithiobacillus gen. nov. International Journal of Systematic and Evolutionary Microbiology Vol. 50. No. 2 pp. 511-516, 2000.

[10] Joseph A.P., Keller J., Bustamante H., Bond P.L. Surface neutralization and H₂S oxidation at early stages of sewer corrosion: influence of temperature, relative humidity and H₂S concentration. Water research Vol. 46. No. 13 pp. 4235-4245, 2012.

[11] Jiang G., Wightman E., Donose B.C., Yuan Z., Bond P.L., Keller J. The role of iron in sulfide induced corrosion of sewer concrete. Water research Vol. 49, pp. 166-174, 2014.

[12] Ondrejka Harbulakova V., Stevulova N., Repka M., Luptakova A. Study of different types of corrosion processes simulated in model conditions. Budownictwo i inzynieria środowiska. Vol. 59. No. 1 pp. 141-148, 2012.

[13] Kovalcikova M., Estokova A., Luptakova A. Application of Granulated Blast Furnace Slag in Cement Composites Exposed to Biogenic Acid Attack. IOP Conference Series: Materials Science and Engineering. Vol. 96. No. 1 pp. 012014, 2015.