Prague's Winter Climatic Conditions - A Case Study of Sandstone Weathering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00201555" target="_blank" >RIV/68407700:21110/12:00201555 - isvavai.cz</a>

Výsledek na webu

<a href="http://sgem.org/sgemlib/spip.php?article1836" target="_blank" >http://sgem.org/sgemlib/spip.php?article1836</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/SGEM2012/S01.V1030" target="_blank" >10.5593/SGEM2012/S01.V1030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Prague's Winter Climatic Conditions - A Case Study of Sandstone Weathering

Popis výsledku v původním jazyce

Weathering processes lead to deterioration of dimension stones and to changes in their durability. The range of the deterioration depends on petrography, including internal structure, mineral and matrix composition, and also changes initiated. The stone's properties are negatively influenced especially during the winter frost period. The presence of salt can exacerbate this process. The Czech national standardized testing methods for natural stone, such as determination of frost resistance and determination of resistance to salt crystallisation, may not take into consideration the actual conditions in the stone's locality. This paper is focused on the description of an alternative procedure of stone durability determination and on the evaluation of induced changes. To simulate the weathering processes typical in Prague's winter climatic conditions, seasonal data from 1999 to 2008 were statistically analyzed. Samples of snow/water mixtures from Prague city centre were chemically analyzed to determine the average NaCl concentration. Three Cretaceous sandstones - Božanov, Hořice and Kocbeře - were tested during this experiment. Developed changes in the internal structure were studied using Hg porosimetry. Physical-mechanical properties, such as water absorption at atmospheric pressure, uniaxial compressive strength, apparent density and open porosity, were also studied.

Název v anglickém jazyce

Prague's Winter Climatic Conditions - A Case Study of Sandstone Weathering

Popis výsledku anglicky

Weathering processes lead to deterioration of dimension stones and to changes in their durability. The range of the deterioration depends on petrography, including internal structure, mineral and matrix composition, and also changes initiated. The stone's properties are negatively influenced especially during the winter frost period. The presence of salt can exacerbate this process. The Czech national standardized testing methods for natural stone, such as determination of frost resistance and determination of resistance to salt crystallisation, may not take into consideration the actual conditions in the stone's locality. This paper is focused on the description of an alternative procedure of stone durability determination and on the evaluation of induced changes. To simulate the weathering processes typical in Prague's winter climatic conditions, seasonal data from 1999 to 2008 were statistically analyzed. Samples of snow/water mixtures from Prague city centre were chemically analyzed to determine the average NaCl concentration. Three Cretaceous sandstones - Božanov, Hořice and Kocbeře - were tested during this experiment. Developed changes in the internal structure were studied using Hg porosimetry. Physical-mechanical properties, such as water absorption at atmospheric pressure, uniaxial compressive strength, apparent density and open porosity, were also studied.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/DF12P01OVV020" target="_blank" >DF12P01OVV020: Komplexní metodika pro výběr a řemeslné opracování náhradního kamene pro opravy kvádrového zdiva historických objektů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

12th International Multidisciplinary Scientific GeoConference SGEM 2012, Conference Proceedings

ISSN

1314-2704

e-ISSN

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Svazek periodika

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Číslo periodika v rámci svazku

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Stát vydavatele periodika

BG - Bulharská republika

Počet stran výsledku

6

Strana od-do

265-270

Kód UT WoS článku

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EID výsledku v databázi Scopus

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