Ondrejka Harbulakova V., Purcz P., Estokova A., Luptakova A., Repka M., 2015, Using a Statistical Method for the Concrete Deterioration Assessment in Sulphate Environment, Chemical Engineering Transactions, 43, 2221-2226.
Corrosion is generally considered as a natural process of decay and progressive degradation of materials by the surrounding environment activity. This irreversible process however can be prevented by adequate measures. This paper is focused on the investigation of the influence of aggressive sulphate environment on the concrete material (with and without coal fly ash replacement). Si, Ca, Al, Fe, Mn and Cu ions dissolved from the cement matrix into leachate during the various aggressive media exposition were measured in the experiment. At the beginning and at the end, the concentration of same ions has been measured in the liquid phase of each media in five 7-days cycles. Determination of concentration of selected ions considering mutual dependence on pH and its dependency on time (measured after each cycle) is presented in the paper. Correlation between the chemical elements and pH for calcium ions was measured and discussed. Significant correlation was found out in case of samples with no fly ash replacement related to the dependence Si-pH.
