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Controlling Swelling of Portland Brownstone

Published online by Cambridge University Press:  01 February 2011

Timothy Wangler  and
George W. Scherer
Timothy Wangler
Affiliation:
[email protected], Princeton University, Chemical Engineering, Eng. Quad. E-211, Princeton, NJ, 08544, United States
George W. Scherer
Affiliation:
[email protected], Princeton University, Civil & Env. Eng., Eng. Quad. E-319, Princeton, NJ, 08544, United States
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Abstract

Many clay-bearing sedimentary stones such as Portland Brownstone will swell when exposed to water, and this can generate damaging stresses as differential strains evolve during a wetting cycle. Current swelling inhibitors, consisting of α,ω-diaminoalkanes, can reduce swelling in Portland Brownstone up to 50%. In this study, through X-ray diffraction and swelling strain experiments, we demonstrate that the α,ω-diaminoalkanes inhibit swelling by substituting for interlayer cations and partially hydrophobicizing the interlayer, then rehydrating on subsequent wetting cycles. We also introduce the copper (II) ethylenediamine complex as a potential treatment for swelling inhibition.

Keywords

intercalationgeologicorganic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1047: Symposium Y – Materials Issues in Art and Archaeology VIII , 2007 , 1047-Y05-03
Copyright
Copyright © Materials Research Society 2008

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