ABSTRACT
Due to the natural environment and man-made destruction, many outdoor stone relics have been weathered and damaged. To restore and protect these historical heritages, microbially induced CaCO 3 precipitation (MICP), one of the most novel technologies, can be applied in an environmentally friendly way. This study repairs the broken white marble beams (40 × 40 × 160 mm) with dolomite sand by MICP technique and investigates the effects of different factors on the restoration process. Firstly, the broken beams with different surface roughness are prepared. The prepared broken beams are treated with two different repairing methods (injection grouting and gravity-driven infiltration). During the MICP treatment, different concentrations of the cementation solution are provided to the samples. After completing the MICP process, the three-point bending tests are conducted to obtain the mechanical properties of the repaired white marble beams and evaluate the effects of the restoration. Overall, this paper can help researchers understand the effects of repairing method, surface roughness, and cementation solution concentration in MICP on repairing white marble beams.
