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Issue 4, 2011
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Biomimic conservation of weathered calcareous stones by apatite

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Abstract

Conservation of the weathered historic calcareous stones by apatite was studied. By mimicking the growth of bone, calcium and phosphorus were introduced into the weathered stone and then mineralized at room temperature. The conservation efficiency was investigated by SEM, EDX, XRD, “Scotch Tape Test” (STT), compressive strength test, capillary water uptake test, water vapor permeability test and weather resistance test. The results of SEM, EDX and XRD showed that the produced bone-like hydroxyapatite could bind the introduced calcium carbonate and the weathered stone blocks together. The test results also indicated that this conservation method could improve the surface strength, compressive strength and weather resistance of the treated samples significantly. Besides, due to the porous nature of the bone-like apatite, the water vapor permeability of the treated stone was not affected and its “breathe function” was retained. Therefore, the proposed method will be a good candidate for the in situ conservation of historic calcareous stones.

Graphical abstract: Biomimic conservation of weathered calcareous stones by apatite

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Article information


Submitted
12 Oct 2010
Accepted
10 Jan 2011
First published
18 Feb 2011

New J. Chem., 2011,35, 887-892
Article type
Paper

Biomimic conservation of weathered calcareous stones by apatite

F. Yang, B. Zhang, Y. Liu, G. Wei, H. Zhang, W. Chen and Z. Xu, New J. Chem., 2011, 35, 887
DOI: 10.1039/C0NJ00783H

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