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Characterization of swelling in clay-bearing stone

By
George W. Scherer
George W. Scherer
1
Princeton University, Department of Civil & Environmental Engineering, Engineering Quad. E-319, Princeton, New Jersey 08544, USA
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Inmaculada Jimenez Gonzalez
Inmaculada Jimenez Gonzalez
1
Princeton University, Department of Civil & Environmental Engineering, Engineering Quad. E-319, Princeton, New Jersey 08544, USA
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Published:
January 01, 2005

Many sedimentary rocks contain clays that cause differential swelling upon exposure to moisture, and the resulting internal stresses are blamed for the deterioration of buildings and monuments. To predict the likelihood of damage from this mechanism, it is necessary to characterize the magnitude of the swelling and the mechanical properties of the stone. Stones that swell also exhibit viscoelastic behavior, probably owing to sliding of the clay layers. In this paper we discuss the characterization of the relaxation and swelling behavior and the estimation of stresses resulting from swelling. A new method for measuring swelling is introduced, in which warping of a plate of stone is produced by wetting one side. This method is faster than the traditional direct measurement of swelling pressure, and it also yields information about the permeability and the influence of wetting on the elastic modulus. Sample results are presented for Portland Brownstone.

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GSA Special Papers

Stone Decay in the Architectural Environment

Alice V. Turkington
Alice V. Turkington
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Geological Society of America
Volume
390
ISBN print:
9780813723907
Publication date:
January 01, 2005

GeoRef

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