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Novel hydroxyapatite-based consolidant and the acceleration of hydrolysis of silicate-based consolidants

Published online by Cambridge University Press:  18 July 2014

Sonia Naidu ,
Chun Liu  and
George W. Scherer
Sonia Naidu
Affiliation:
Department of Chemical and Biological Engineering, Eng. Quad. E-226, Princeton University, Princeton, NJ 08544, USA
Chun Liu
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720, USA
George W. Scherer
Affiliation:
Department of Civil and Environmental Engineering, Eng. Quad. E-319, Princeton University, Princeton, NJ 08544, USA
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Abstract

This paper discusses the effectiveness of hydroxyapatite (HAP) as an inorganic consolidant for physically weathered Indiana Limestone, and as a coupling agent between limestone and a silicate consolidant. A double application is investigated, in which samples are coated with HAP followed by a commercially available silicate-based consolidant (Conservare® OH-100). To artificially weather limestone, a thermal degradation technique was utilized. Diammonium hydrogen phosphate (DAP) salt was reacted with limestone, alone and with cationic precursors, to produce HAP films. The dynamic elastic modulus, water sorptivity and tensile strength of the treated stones were evaluated. HAP was found to be an effective consolidant for weathered Indiana Limestone, and its performance was enhanced by addition of millimolar quantities of calcium chloride. However, HAP was not useful as a coupling agent; a double treatment with DAP is more effective than sequential treatment with DAP and Conservare®.

Keywords

artcoatingstrength
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1656: Symposium PP – Materials Issues in Art and Archaeology X , 2014 , pp. 9 - 14
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

Doehne, E. and Price, C.A., Stone Conservation: An Overview of Current Research, 2 nd ed. (Getty Conservation Inst., Los Angeles, 2010)Google Scholar
Grissom, C.A. and Weiss, N.R. (1981): “Alkoxysilanes in the conservation of art and architecture: 1861-1981”, Art and Archaeology Technical Abstracts 18(1): 150–202 Google Scholar
Wheeler, G., Alkoxysilanes and the Consolidation of Stone (Getty Conservation Institute, Los Angeles, 2005) 196 pp.Google Scholar
Brinker, C.J. and Scherer, G.W., Sol-Gel Science (Academic Press, New York, 1990) Ch. 3Google Scholar
PROSOCO, 3741 Greenway Circle Lawrence, KS 66046 http://www.prosoco.com/Products/ Google Scholar
Scherer, G.W. and Wheeler, G.S. (2009): “Silicate Consolidants for Stone”, Key Engineering Materials 391: 1–25 (online at http://www.scientific.net © (2009) Trans Tech Publications, Switzerland) ISBN: 978-0-87849-365-4 10.4028/www.scientific.net/KEM.391.1CrossRefGoogle Scholar
Sassoni, E., Naidu, S. and Scherer, G.W. (2011): “The use of hydroxyapatite as a new inorganic consolidant for damaged carbonate stones”, J. Cultural Heritage 12: 346–355 10.1016/j.culher.2011.02.005CrossRefGoogle Scholar
Matteini, M., Rescic, S., Fratini, F. and Botticelli, G. (2011): “Ammonium Phosphates as Consolidating Agents for Carbonatic Stone Materials Used in Architecture and Cultural Heritage: Preliminary Research”, Int. J. Architectural Heritage: Conservation, Analysis, and Restoration 5(6): 717–736 10.1080/15583058.2010.495445CrossRefGoogle Scholar
Yang, F., Zhang, B., Liu, Y., Wei, G., Zhang, H., Chen, W. and Xu, Z. (2011): “Biomimic conservation of weathered calcareous stones by apatite”, New J. Chem. 35: 887–892 10.1039/c0nj00783hCrossRefGoogle Scholar
Naidu, S. (2014): Novel Hydroxyapatite Coatings for the Conservation of Marble and Limestone, Ph.D. Thesis, Dept. Chemical and Biological Eng., Princeton University Google Scholar
Perry, T., Smith, N.M. and Wayne, W.J., Salem limestone and associated formations in south-central Indiana, Indiana Department of Conservation, Geological Survey, Field Conference Guidebook 7, 1954 Google Scholar
Franzoni, E., Sassoni, E., Scherer, G.W. and Naidu, S. (2012): “Artificial weathering of stone by heating”, J. Cultural Heritage 14(3): 85–93 10.1016/j.culher.2012.11.026CrossRefGoogle Scholar
Esaki, T. and Jiang, K. (1999): “Comprehensive study of the weathered condition of welded tuff from a historic bridge in Kagoshima, Japan”, Eng. Geol. 55: 121–130 10.1016/S0013-7952(99)00112-XCrossRefGoogle Scholar
Kolsky, H., Stress waves in solids, Dover, Minneola, New York, 1963 Google Scholar
Naidu, S., Liu, C., and Scherer, G.W. (2014): “New techniques in limestone consolidation: Hydroxyapatite-based consolidant and the acceleration of hydrolysis of silicate-based consolidants”, J. Cultural Heritage, http://dx.doi.org/10.1016/j.culher.2014.01.001 Google Scholar