Critical assessment of the "non-destructiveness" of Schmidt hammer test on monumental sandstones: A microscopic and microstructural approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10469073" target="_blank" >RIV/00216208:11310/23:10469073 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vEtgeZ0qyH" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vEtgeZ0qyH</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.culher.2022.12.011" target="_blank" >10.1016/j.culher.2022.12.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Critical assessment of the "non-destructiveness" of Schmidt hammer test on monumental sandstones: A microscopic and microstructural approach

Popis výsledku v původním jazyce

The assumed non-destructive character of Schmidt hammer test is challenged because the practical experience with in situ application of the Schmidt hammer raises a question, whether the response of a tested material is of purely elastic nature. In the recent study, several types of sandstones used as natural building/sculptural stone were tested in dry and/or wet conditions by using N-type Schmidt hammer. In order to preserve phenomena of potential brittle damage, the impacted areas were impregnated with a mixture of a low viscosity epoxy resin and a fluorescent dye. After hardening of the mixture, thin sections have been prepared from cuts perpendicular to the impacted surface. Their microscopic investigation allowed for the detection of characteristic zone of brittle damage (2-5 mm deep and 5-12 mm wide) consisting of (1) a flat, shallow depression - a crater, (2) crushed (pulverized) zone, and (3) microcracked zone. The observed brittle damage is similar to that one caused by similar hardness tests including indentation ones. Based on the current results, it can be concluded that Schmidt hammer test should be considered as microdestructive instead of non-destructive. Its use for the artistic objects with preserved original surface of high art-history value (i.e. natural stone artefacts with original traces of sculptor&apos;s tools on the surface) can led to their partial destruction, resulting in an unwanted effect on protected artworks.

Název v anglickém jazyce

Critical assessment of the "non-destructiveness" of Schmidt hammer test on monumental sandstones: A microscopic and microstructural approach

Popis výsledku anglicky

The assumed non-destructive character of Schmidt hammer test is challenged because the practical experience with in situ application of the Schmidt hammer raises a question, whether the response of a tested material is of purely elastic nature. In the recent study, several types of sandstones used as natural building/sculptural stone were tested in dry and/or wet conditions by using N-type Schmidt hammer. In order to preserve phenomena of potential brittle damage, the impacted areas were impregnated with a mixture of a low viscosity epoxy resin and a fluorescent dye. After hardening of the mixture, thin sections have been prepared from cuts perpendicular to the impacted surface. Their microscopic investigation allowed for the detection of characteristic zone of brittle damage (2-5 mm deep and 5-12 mm wide) consisting of (1) a flat, shallow depression - a crater, (2) crushed (pulverized) zone, and (3) microcracked zone. The observed brittle damage is similar to that one caused by similar hardness tests including indentation ones. Based on the current results, it can be concluded that Schmidt hammer test should be considered as microdestructive instead of non-destructive. Its use for the artistic objects with preserved original surface of high art-history value (i.e. natural stone artefacts with original traces of sculptor&apos;s tools on the surface) can led to their partial destruction, resulting in an unwanted effect on protected artworks.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Cultural Heritage

ISSN

1296-2074

e-ISSN

1778-3674

Svazek periodika

59

Číslo periodika v rámci svazku

January–February

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

247-254

Kód UT WoS článku

000968697900001

EID výsledku v databázi Scopus

2-s2.0-85146013959