Study of Concrete Samples With Various Contents of Slag Under Sulphates Attack Using Mathematical Approach

Mineral admixtures are used as a partial replacement for ordinary portland cement, and the progress of sulphate attack can be evaluated by several methods (pH values changes of liquid phases, loss in mass, dynamic modulus, strength, x-ray analysis, mathematical analysis). Leaching of the calcium and silicon ions from the concrete composites of various slag cement replacement (65% and 95% of slag) exposed to two different aggressive sulphate environments (sulphuric acid and magnesium sulphate) was measured by using X-ray fluorescence analysis (XRF). Consequently a statistical analysis of different media´ influence on the concrete samples deterioration was performed. The correlation between the Ca/Si leached-out masses (the same aggressive media) as well as between the concentrations of silicon and calcium each other (different aggressive media) was calculated a presented.