A physical and chemical characterization to the slag fibers was carried out by several instrumental techniques. Its main components were Si, Mg and Al oxides. The distribution of these elements was constants and uniform in all slag fibers' body by its amorphous structure, which generates surface'sites with both positive and negative charges in aqueous solution, which is depending on the compound lacated in the site.
The dissolution behavior of the slag fibers was negligible in a wide range of pH (4 to 10) and temperature (25 to 95°C), which was an important collecting feature as ecomaterial. The slag fibers' dissolution at low and high pH was concordant with thermodynamic predictions. The differential dissolution by different elements of slag fibers produces a remarkably high difference between the point of zero charge (pH10.8) and isoelectric point (pH2.9) of this material.