Experimental measurement of disjoining force at the glass–salt interface: A direct evidence of salt degradation potential caused by crystallization pressure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F20%3A00522846" target="_blank" >RIV/68378297:_____/20:00522846 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/20:00337934 RIV/68407700:21230/20:00337934

Výsledek na webu

<a href="https://doi.org/10.1016/j.culher.2019.10.003" target="_blank" >https://doi.org/10.1016/j.culher.2019.10.003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.culher.2019.10.003" target="_blank" >10.1016/j.culher.2019.10.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental measurement of disjoining force at the glass–salt interface: A direct evidence of salt degradation potential caused by crystallization pressure

Popis výsledku v původním jazyce

Salt degradation is a well-known but still poorly understood problem. Determination of crystallizationpressure that growing crystals exert on the pore walls represents a challenge solved by authors fromdifferent points of view. Nevertheless, few papers are aimed at the experimental measurement of thecrystallization pressure magnitude. A novel high precision device able to detect repulsive forces generatedby a crystal at the crystal/glass interface has been designed. Although some problems with determiningthe correct contact area of the confined crystal surface, which is most probably not atomically smooth,still exist, the results are comparable to data from other experimental studies. Crystallization experimentswere performed with sodium chloride under 30 ± 2% and 60 ± 2% relative humidity (RH) conditions andwith sodium sulfate in 30 ± 2% RH. The disjoining pressure values were variable but did not exceed1 MPa. Special interest was aimed at determination of disjoining pressure of sodium sulfate during phasetransition after wetting, since this phenomenon creates most damage during standard crystallizationtests. The disjoining pressure values were between 0.957 and 3.159 MPa – sufficiently high to overcomethe tensile strength of most of the porous building materials.

Název v anglickém jazyce

Experimental measurement of disjoining force at the glass–salt interface: A direct evidence of salt degradation potential caused by crystallization pressure

Popis výsledku anglicky

Salt degradation is a well-known but still poorly understood problem. Determination of crystallizationpressure that growing crystals exert on the pore walls represents a challenge solved by authors fromdifferent points of view. Nevertheless, few papers are aimed at the experimental measurement of thecrystallization pressure magnitude. A novel high precision device able to detect repulsive forces generatedby a crystal at the crystal/glass interface has been designed. Although some problems with determiningthe correct contact area of the confined crystal surface, which is most probably not atomically smooth,still exist, the results are comparable to data from other experimental studies. Crystallization experimentswere performed with sodium chloride under 30 ± 2% and 60 ± 2% relative humidity (RH) conditions andwith sodium sulfate in 30 ± 2% RH. The disjoining pressure values were variable but did not exceed1 MPa. Special interest was aimed at determination of disjoining pressure of sodium sulfate during phasetransition after wetting, since this phenomenon creates most damage during standard crystallizationtests. The disjoining pressure values were between 0.957 and 3.159 MPa – sufficiently high to overcomethe tensile strength of most of the porous building materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Kumulativní časově závislé procesy ve stavebních materiálech a konstrukcích</a><br>

Návaznosti

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

Rok uplatnění

2020

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

—

Svazek periodika

42

Číslo periodika v rámci svazku

March-April

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000525864000001

EID výsledku v databázi Scopus

2-s2.0-85075477060