Microstructural changes in building materials after various consolidation treatments studied by small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00575353" target="_blank" >RIV/61389005:_____/23:00575353 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378297:_____/23:00575353

Výsledek na webu

<a href="https://doi.org/10.1107/S1600576723005320" target="_blank" >https://doi.org/10.1107/S1600576723005320</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1107/S1600576723005320" target="_blank" >10.1107/S1600576723005320</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructural changes in building materials after various consolidation treatments studied by small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy

Popis výsledku v původním jazyce

Stone or rendered facades of historical buildings often encounter loss of cohesion after long-term weathering. Specialist consolidating agents containing nanoparticles which can penetrate the degraded layer are used to extend the lifetime of such facades. Clay mortar prepared in the laboratory was used in the present study as a material for testing the effectiveness of several consolidating agents. Changes in porosity after treatment of the sample layers were assessed using small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy techniques. The scattering differed for the various samples, mainly in the medium range of scattering vector magnitudes. The cause of the scattering was ascribed to three populations of pores: large (micrometres), medium-sized (thousands of angstroms) and small (hundreds of angstroms). While the non-treated sample and the sample treated with a silicic acid ester-based product do not exhibit significant differences, the sample treated with a nano-lime suspension shows a decrease of 16% in the volume fraction of medium-sized pores. A difference was also observed in the sample treated with a dihydrogen ammonium phosphate solution: the size of the medium pores increased while their volume fraction decreased, and a change in the large pores was observed. The modelled small pores remained unaffected by the consolidating treatment.

Název v anglickém jazyce

Microstructural changes in building materials after various consolidation treatments studied by small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy

Popis výsledku anglicky

Stone or rendered facades of historical buildings often encounter loss of cohesion after long-term weathering. Specialist consolidating agents containing nanoparticles which can penetrate the degraded layer are used to extend the lifetime of such facades. Clay mortar prepared in the laboratory was used in the present study as a material for testing the effectiveness of several consolidating agents. Changes in porosity after treatment of the sample layers were assessed using small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy techniques. The scattering differed for the various samples, mainly in the medium range of scattering vector magnitudes. The cause of the scattering was ascribed to three populations of pores: large (micrometres), medium-sized (thousands of angstroms) and small (hundreds of angstroms). While the non-treated sample and the sample treated with a silicic acid ester-based product do not exhibit significant differences, the sample treated with a nano-lime suspension shows a decrease of 16% in the volume fraction of medium-sized pores. A difference was also observed in the sample treated with a dihydrogen ammonium phosphate solution: the size of the medium pores increased while their volume fraction decreased, and a change in the large pores was observed. The modelled small pores remained unaffected by the consolidating treatment.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF16_013%2F0001812" target="_blank" >EF16_013/0001812: Centrum urychlovačů a jaderných analytických metod - OP</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Crystallography

ISSN

0021-8898

e-ISSN

1600-5767

Svazek periodika

56

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

976-987

Kód UT WoS článku

001046279800007

EID výsledku v databázi Scopus

2-s2.0-85168081495