Having observed that the dry deposition of heavy oil fly ash on calcareous materials (marble and calcarenite) causes substantial alterations after brief periods of contact (in a matter of days) in environmental conditions characterised by average-high humidity levels, we tried to establish whether these effects might be avoided by coating the monument surfaces with some of the more common polymer-based materials. Analyses (using optical and electronic microscopy and X-ray diffractometry) of the surfaces contacted with oil fly ash over periods of between 1 day and 3 months in relative humidity conditions (RH) > 50%, evidenced serious alterations after a few days of contact in the presence of non filmogen materials and after more than a month in the case of filmogen ones. The results are presented and discussed in this paper.
The efficiency of protective treatments against damage to monuments by acid particulate
PRIMERANO, Patrizia;MAVILIA, LETTERIO;CORIGLIANO, Francesco;DI PASQUALE, Sebastiana;ARRIGO, Ileana
2003-01-01
Abstract
Having observed that the dry deposition of heavy oil fly ash on calcareous materials (marble and calcarenite) causes substantial alterations after brief periods of contact (in a matter of days) in environmental conditions characterised by average-high humidity levels, we tried to establish whether these effects might be avoided by coating the monument surfaces with some of the more common polymer-based materials. Analyses (using optical and electronic microscopy and X-ray diffractometry) of the surfaces contacted with oil fly ash over periods of between 1 day and 3 months in relative humidity conditions (RH) > 50%, evidenced serious alterations after a few days of contact in the presence of non filmogen materials and after more than a month in the case of filmogen ones. The results are presented and discussed in this paper.Pubblicazioni consigliate
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