Characteristics and morphology of weathering crusts on porous limestone, the role of climate and air pollution

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Two types of porous Miocene limestones; a fine-grained, a medium-grained oolitic were studied on monuments that are located in the polluted urban environment of Budapest. The surface alteration is characterized by the presence of very common white (thin and thick) and less abundant black (laminar and framboidal) weathering crusts. Flaking, scaling and blistering are common crust detachment forms. The exposed weaker surface below the crusts often shows granular disintegration. Non-destructive in situ tests such as Schmidt hammer rebound and Duroscope were used to assess the physical properties of the weathered surfaces. These tests clearly document the presence of thin and thick weathering crusts and the degradation of underlying fine- and medium-grained limestones. A textural change is marked by pore occluding calcite and reduction of porosity in the crust zone, which was also recorded by Karsten-tube measurements. The analyses have demonstrated that the air pollution related gypsum crystallization with combination of freeze/thaw weathering lead to crust detachment with rates strongly controlled by the micro-fabric of limestone substrate.

Original languageEnglish
Title of host publicationPreservation of Natural Stone and Rock Weathering - Proceedings of the International Workshop on Preservation of Natural Stone and Rock Weathering
Pages61-66
Number of pages6
Publication statusPublished - 2007
EventInternational Workshop on Preservation of Natural Stone and Rock Weathering - Madrid, Spain
Duration: Jul 14 2007Jul 14 2007

Other

OtherInternational Workshop on Preservation of Natural Stone and Rock Weathering
CountrySpain
CityMadrid
Period7/14/077/14/07

Fingerprint

Weathering
Limestone
Air pollution
atmospheric pollution
weathering
limestone
crust
climate
Disintegration
Hammers
Calcite
Gypsum
Physical properties
Porosity
Crystallization
Degradation
in situ test
Substrates
monument
gypsum

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Török, A. (2007). Characteristics and morphology of weathering crusts on porous limestone, the role of climate and air pollution. In Preservation of Natural Stone and Rock Weathering - Proceedings of the International Workshop on Preservation of Natural Stone and Rock Weathering (pp. 61-66)

Characteristics and morphology of weathering crusts on porous limestone, the role of climate and air pollution. / Török, A.

Preservation of Natural Stone and Rock Weathering - Proceedings of the International Workshop on Preservation of Natural Stone and Rock Weathering. 2007. p. 61-66.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Török, A 2007, Characteristics and morphology of weathering crusts on porous limestone, the role of climate and air pollution. in Preservation of Natural Stone and Rock Weathering - Proceedings of the International Workshop on Preservation of Natural Stone and Rock Weathering. pp. 61-66, International Workshop on Preservation of Natural Stone and Rock Weathering, Madrid, Spain, 7/14/07.
Török A. Characteristics and morphology of weathering crusts on porous limestone, the role of climate and air pollution. In Preservation of Natural Stone and Rock Weathering - Proceedings of the International Workshop on Preservation of Natural Stone and Rock Weathering. 2007. p. 61-66
Török, A. / Characteristics and morphology of weathering crusts on porous limestone, the role of climate and air pollution. Preservation of Natural Stone and Rock Weathering - Proceedings of the International Workshop on Preservation of Natural Stone and Rock Weathering. 2007. pp. 61-66
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