Two monomers, flexible ethyl silicate and butyl methacrylate, have been tested on a pyroclastic rock (tuff) for evaluating the consolidation efficacy of in situ polymerization treatments. In the step polymerization mechanism, flexible ethyl silicate has given good yield, which is associated to high hydrophobic and cohesive properties, and remarkable chromatic changes of the treated stone surface. On the contrary, in the radical polymerization of butyl methacrylate low yields an poor performances have been usually obtained. Good penetration depth and high stone hardness have been obtained with traditional consolidation treatments using macromolecules with suitable molecular weight. However, an increase in stone brittleness has been observed in tuff samples treated with an acrylic polymer (Paraloid B72).
Consolidation of tuff: in situ polymerization or traditional methods?
Mara Camaiti;
2007
Abstract
Two monomers, flexible ethyl silicate and butyl methacrylate, have been tested on a pyroclastic rock (tuff) for evaluating the consolidation efficacy of in situ polymerization treatments. In the step polymerization mechanism, flexible ethyl silicate has given good yield, which is associated to high hydrophobic and cohesive properties, and remarkable chromatic changes of the treated stone surface. On the contrary, in the radical polymerization of butyl methacrylate low yields an poor performances have been usually obtained. Good penetration depth and high stone hardness have been obtained with traditional consolidation treatments using macromolecules with suitable molecular weight. However, an increase in stone brittleness has been observed in tuff samples treated with an acrylic polymer (Paraloid B72).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
