Evaluation of the efficacy of a bioconsolidation treatment in the columns of the Court of the Lions in the Alhambra


This study aimed to demonstrate the effectiveness of a bio-consolidation treatment applied on the weathered marble of the columns of the Lions Courtyard of the Alhambra. The analytical techniques used were: X-ray diffraction; optical and scanning electron microscopies. We have shown that the carbonatogenic activity of bacteria is possible in low porous stones that present deterioration by-products such as gypsum, as well as surface deposits of clay minerals and previous (non-effective) alkoxysilane treatments.