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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Journal of Cultural Heritage

ISSN

1296-2074

e-ISSN

1778-3674

Volume of the periodical

59

Issue of the periodical within the volume

January–February

Country of publishing house

FR - FRANCE

Number of pages

8

Pages from-to

247-254

UT code for WoS article

000968697900001

EID of the result in the Scopus database

2-s2.0-85146013959