The influence of the chloride content in cement CEM III on the chemical resistance of concrete under conditions simulating the effect of acid rain and wastewater

• Autorzy: Kuziak J. , Woyciechowski P.
• Języki publikacji: EN

Abstrakty

EN

Chlorides content in cement is related to the production process – the sources of chlorides are mainly fuels, especially alternative fuels. Some chlorides are drawn off with by-pass powder, which is a by-product not easy for utilization. To reduce the production of environmentally noxious waste, cement producers attempt to increase the chloride content in ground granulated blast furnace slag cement (CEM III) above the value of 0.10% by weight. In European standard (EN 197-1) the limit value of chloride content in cement is generally 0.10% by mass, however, for CEM III there is a note in this standard which permits higher content of chlorides in this type of cement. The accelerated tests on the effect of the chloride content in CEM III, in the range of 0.1 – 0.5%, on the chemical resistance of concrete in solutions simulating acid rain and wastewater were performed. The solution of nitric acid and sulfuric acid was used as a solution simulating the acid rain. Solution simulating the wastewater contained ammonium sulfate, magnesium sulfate and sulfuric acid. After five weeks of exposure of concrete to corrosive solutions, weight change and the strength of the concrete samples were determined. No significant effect of the chloride content in cement over a range of tested values on the chemical resistance of concrete in environment simulating acid rain and wastewater was found.

Słowa kluczowe

EN

granulated blast furnace slag cement; chloride ions; chemical resistance; acid rain; wastewater

PL

jony chlorkowe; odporność chemiczna; kwaśny deszcz; ścieki; żużel wielkopiecowy granulowany

• Wydawca: Agord - Karol Brzeziński
• Czasopismo: Journal of Building Chemistry
• Rocznik: 2016
• Tom: Vol. 1, iss. 1
• Strony: 54--60
• Opis fizyczny: Bibliogr. 10 poz., rys., tab. wykr.

Twórcy

autor

Kuziak J.

• Warsaw University of Technology, Faculty of Civil Engineering, al. Armii Ludowej 16, Warsaw 00-637, Poland

autor

Woyciechowski P.

• Warsaw University of Technology, Faculty of Civil Engineering, al. Armii Ludowej 16, Warsaw 00-637, Poland

Bibliografia

• EN 197-1, 2000. Cement – Part 1: Composition, specifications and conformity criteria for common cements. European Standard.
• Fan Y.F., Hu Z.Q., Zhang J.L., Liu J.L.: Determination of compressive property of concrete under simulated acid rain environment. Construction and Building Materials 24 (2010), 1975-1983. http://dx.doi.org/10.1016/j.conbuildmat.2010.04.002
• Gruener M.: Concrete corrosion and protection (in Polish). Arkady, 1983.
• Kurdowski W.: Cement and concrete chemistry. Springer Science & Business, 2014.
• Kuziak J., Woyciechowski P., Wcisło A.: Influence of the chloride content in blast furnace slag cement on protective ability of concrete cover for reinforcement. Ochrona przed korozją 59 (2016), 196-199. http://dx.doi.org/10.15199/40.2016.6.1
• Monteiro P. J. M., Roesler J.,. Kurtis K. E, Harvey J.: Accelerated test for measuring sulfate resistance of hydraulic cements for Caltrans LLPRS program. Report prepared for California Department of Transportation. University of California, Berkeley, 2000.
• Santhanam M. Cohen M.D., Olek J.: Sulfate attack research – whither now? Cement and Concrete Research 31 (2001), 845-851. http://dx.doi.org/10.1016/S0008-8846(01)00510-5
• Woyciechowski P., Kuziak J., Królikowski A.: Chloride concentration in concrete and the risk of corrosion of reinforcement. Ochrona przed korozją 55 (2012), 286-288.
• Woyciechowski P., Sokołowska J.J., Jaworska B.: Methodology for assessing chemical resistance of cement concrete for sewer elements. Ochrona przed korozją 59 (2016), 10-17. http://dx.doi.org/10.15199/40.2016.1.3
• Xie S., Qi L., Zhou D.: Investigation of the effects of amid rain on the deterioration of cement concrete using accelerated test established in laboratory. Atmospheric Environment 38 (2004), 4457-4466. http://dx.doi.org/10.1016/j.atmosenv.2004.05.017

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.