Assessing the performance of the multi-morphological profiles in urban land cover mapping using pixel based classifiers and very high resolution satellite imagery

Experimental Investigation of the Relationship between Surface Crack of Concrete Cover and Corrosion Degree of Steel Bar Using Fractal Theory

“…The steel bars in actual structures are not completely immersed in a salt solution. To ensure that the electrolyte solution is in sufficient contact with the steel bars' surface, the semi-immersion method was used in this study because the steel bar corrosion based on this method closely emulates the scenario in a natural environment [31]. As shown in Figure 2, the concrete specimens were semi-immersed in a 5% NaCl solution.…”

“…As shown, the lnδ and lnN values of all specimens indicate a linear relationship, with the coefficient of determination R 2 greater than 0.99, indicating that the cracks generated by corrosion and subsequently causing the expansion of concrete exhibit significant fractal characteristics. Therefore, they can be aptly described and analyzed based on fractal theory [11,12,31]. The fractal dimension D represented by the slope of the fitting line (Figure 7) reflects the irregularity of the profile of the corrosion-induced cracks with fractal characteristics.…”