Lightweight repair plasters: Evaluation of the resistance against NaCl crystallization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00367785" target="_blank" >RIV/68407700:21110/23:00367785 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.0162275" target="_blank" >https://doi.org/10.1063/5.0162275</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0162275" target="_blank" >10.1063/5.0162275</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Lightweight repair plasters: Evaluation of the resistance against NaCl crystallization

Popis výsledku v původním jazyce

The service life of repair plasters is affected by many factors. Salt crystallization is one of the most important, especially in case of plasters intended for repair of salt laden masonry. To predict the durability of plasters, the accelerated laboratory salt crystallization tests are usually used. However, there is still no standard commonly accepted methodology for evaluating the durability of plasters with regard to salt damage. In this paper, the investigation of sodium chloride (NaCl) crystallization in three lightweight repair plasters is presented. Plasters were subjected to an accelerated laboratory salt crystallization test, which consisted of cyclic drying and wetting with using of NaCl solution. Studied materials were two cement-lime plasters and one gypsum-lime plaster, all lightened by the addition of expanded perlite in order to enhance their thermal insulation parameters. The characterization of plasters before drying-wetting cycles included measurement of specific density, bulk density, total open porosity, compressive strength, flexural strength, and dynamic modulus of elasticity. The evaluation of salt crystallization resistance was determined by means of scanning electron microscopy (SEM) investigation and compressive strength ratio before and after salt crystallization test. Based on the results obtained, the developed plasters can be recommended for use as a material in the repair of the salt laden masonry.

Název v anglickém jazyce

Lightweight repair plasters: Evaluation of the resistance against NaCl crystallization

Popis výsledku anglicky

The service life of repair plasters is affected by many factors. Salt crystallization is one of the most important, especially in case of plasters intended for repair of salt laden masonry. To predict the durability of plasters, the accelerated laboratory salt crystallization tests are usually used. However, there is still no standard commonly accepted methodology for evaluating the durability of plasters with regard to salt damage. In this paper, the investigation of sodium chloride (NaCl) crystallization in three lightweight repair plasters is presented. Plasters were subjected to an accelerated laboratory salt crystallization test, which consisted of cyclic drying and wetting with using of NaCl solution. Studied materials were two cement-lime plasters and one gypsum-lime plaster, all lightened by the addition of expanded perlite in order to enhance their thermal insulation parameters. The characterization of plasters before drying-wetting cycles included measurement of specific density, bulk density, total open porosity, compressive strength, flexural strength, and dynamic modulus of elasticity. The evaluation of salt crystallization resistance was determined by means of scanning electron microscopy (SEM) investigation and compressive strength ratio before and after salt crystallization test. Based on the results obtained, the developed plasters can be recommended for use as a material in the repair of the salt laden masonry.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA21-06582S" target="_blank" >GA21-06582S: Experimentální a počítačová analýza transportu, akumulace a krystalizace solí v nehydrofobizovaných omítkových maltách</a><br>

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 statě ve sborníku

International Conference of Numerical Analysis and Applied Mathematics ICNAAM 2021

ISBN

978-0-7354-4589-5

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

4

Strana od-do

"130005-1"-"130005-4"

Název nakladatele

AIP Publishing

Místo vydání

Melville, NY

Místo konání akce

Rodos

Datum konání akce

20. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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