NDLI: Limestones under salt decay tests: assessment of pore network-dependent durability predictors

Content Provider	Springer Nature Link
Author	Alves, Carlos Figueiredo, Carlos Maurício, António Braga, Maria Amália Sequeira Aires Barros, Luís
Copyright Year	2011
Abstract	Three Portuguese limestones (two grainstones, Semi-rijo and Moca Creme commercial types, and a travertine) were subjected to salt crystallisation test (EN 12370:1999). Grainstones specimens showed higher weight loss than the travertine ones. Results are discussed, using parametric and nonparametric statistics, in relation to pore space characteristics that have been considered durability predictors, evaluated at the macroscopic (water imbibition) and microscopic (mercury injection porosimetry) levels. Several of the pore-space parameters indicate differences between grainstones and travertine, but these differences are much lower than the differences in weight loss. Results of the durability dimensional estimator (DDE) seem to present a discrepancy, with higher values in the rock type having lower weight loss (travertine). Additionally, weathering patterns of travertine samples show marked irregularities (a feature that is not assessed by weight loss). These irregularities are attributed to heterogeneous spatial distribution of detritic components (a feature that is not assessed by pore-space parameters). Comparing the grainstones, Moca Creme showed higher values of mass loss and several durability predictors suggested noteworthy differences in relation to Semi-rijo. However, these differences are much lower than differences in weight loss. Calculated crystallisation pressures are even higher for Semi-rijo. It is proposed that petrographical aspects of Moca Creme, namely heterogeneity related to the presence of bioclasts and veinlets, could contribute to explain the higher weathering susceptibility of this rock type. These results highlight the need to include petrographical features in assessments of durability and the usefulness of visual description on the characterization of salt weathering.
Starting Page	1511
Ending Page	1527
Page Count	17
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	63
Issue Number	7-8
e-ISSN	18666299
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-02-06
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Natural stone durability predictors Limestones Grainstones Travertine Pore-space characteristics Salt weathering Geology
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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