（1.Key Scientific Research Base of Ancient Ceramics, State Administration for Cultural Heritage, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China) （2.Shanghai University, Shanghai 200444, China）
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DOI:
10.7502/j.issn.1674-3962.2012.11.01
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Abstract:
Stone relics tend to be corroded by environment, due to their special porous structures. Organosilane consolidants are frequently used in protecting stone relics. The gels formed in stone porous by organosilanes can enhance strength of stone and improve its resistance to weathering. However, it is known that the resulting silica gel tends to develop cracks inside the stone as the gel shrinks during aging and drying, which may accelerate the erosion from environment and lead to serious problems. Modifying of organosilanes may control the issue to certain extent, by adding flexible segments or nanoparticles for instance. In this report, we first give a brief review on the history of development and use of organosilanes as consolidants and then demonstrate the possible mechanisms of gel cracking during drying and aging, and further discuss potential ways of obtaining crack free silicate consolidants.