Influence of Clay Minerals Nature on the Hydromechanical and Fracture Behaviour of Stones

Elastic properties and fracture behaviour evolutions of two sedimentary stones are under study to estimate their influence on scaling effect of monumental stone heritage. Young moduli and toughness of Villarlod molasse and Thüringer sandstone are measured under moisture content variations with respe...

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Bibliographic Details
Published in:Rock mechanics and rock engineering 2019-06, Vol.52 (6), p.1599-1611
Main Authors: Tiennot, Mathilde, Mertz, Jean-Didier, Bourgès, Ann
Format: Article
Language:English
Subjects:
Anisotropy
Civil Engineering
Clay
Clay minerals
Correlation
Deformation
Drying
Earth and Environmental Science
Earth Sciences
Elastic properties
Fracture toughness
Geophysics
Geophysics/Geodesy
Glauconite
Humidification
Minerals
Moisture content
Original Paper
Properties
Relative humidity
Sandstone
Scaling
Sciences of the Universe
Sedimentary rocks
Smectites
Stone
Water content
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Summary:Elastic properties and fracture behaviour evolutions of two sedimentary stones are under study to estimate their influence on scaling effect of monumental stone heritage. Young moduli and toughness of Villarlod molasse and Thüringer sandstone are measured under moisture content variations with respect to their natural anisotropy. Several relative humidity levels are considered to investigate their effect upon humidification and drying. The stone property evolution is in close correlation with the identified clay phases of the matrix. It appears that clay minerals as smectite and glauconite influence the stone properties at very low moisture contents, whereas less swelling clays have impact only when high moisture contents are reached. This is in close correlation with the inherent deformation ability of these minerals. It is observed that nature and distribution of clay phases largely influence on the macroscopic behaviour under natural exposure conditions, as they modify the stone properties and represent the weakness planes of the stone.
ISSN:0723-2632
1434-453X
DOI:10.1007/s00603-018-1672-1