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Modification of the Physical Properties of Natural and Artificial Adobe by Chemical Consolidation

Published online by Cambridge University Press:  28 February 2011

Richard L. Coffman
Richard L. Coffman*
Affiliation:
Neville Agnew and Charles Selwitz Getty Conservation Institute, Marina Del Rey, CA 90292
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Abstract

The use of commercially available chemical consolidants (hexamethylene diisocyanate (HDI) - derived polymers and silane esters) has been shown to increase the compressive strength of adobe and other natural building materials. Laboratory and field testing of chemically-treated adobe and sand-clay mixtures have also revealed an enhanced resistance to disintegration by water.

In HDI-treated materials this resistance to disintegration is attained without a significant loss of porosity. Because porosity is not lost and the adobe can still transmit water, the uptake of water by capillary rise is less destructive than for an adobe whose surface is sealed against moisture penetration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 185: Symposium G – Materials Issues in Art and Archaeology II , 1990 , 201
Copyright
Copyright © Materials Research Society 1990

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References

[1] Agnew, N.H., “Adobe Preservation”, Report on a Three Month Research Prolect at the Getty Conservation Institute, (1987) 103 P.Google Scholar
[2] Coffman, R.L., Agnew, N.H., Geis, M., and Selwitz, C., “The Effects of Hexamethylene Diisocyanate-Derived Polymers on the 207 Physical Properties of Selected Natural Clays”, (Unpublished, in review).Google Scholar
(3) Theng, B.K.G., Formation and Properties of Clay-Polymer Complexes, (Elsevier, Amsterdam, 1979) p.123–154 Google Scholar
[4] Sposito, G., (Private communication, 1989)Google Scholar