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. 2019 Sep 18;12(18):3025. doi: 10.3390/ma12183025

Figure 2.

Figure 2

SEM micrographs of treated samples displaying some characteristics of the consolidants: adhesion, bridging capacity and porous microstructure with some shrinkage cracking (indicated by the arrows) of nanolime (NL) on (a) Schlaitdorfer sandstone and (b) Auer limestone; penetration depth (about 500 µm) of (c) NL on Schlaitdorfer sandstone and (d) Nanocalcite (NC) on Auer limestone with both consolidants shown in false colour; (e) adhesion and compact microstructure with some shrinkage cracks of di-ammonium phosphate-nanocalcite (DAP-NC) (see arrows) on Schlaitdorfer sandstone; and (f) adhesion of DAP-NC (see arrows) to the clayey matrix of Schlaitdorfer sandstone.