Influence of ageing conditions on the mineralogical micro-character of natural hydraulic lime mortars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F20%3A00531521" target="_blank" >RIV/68378297:_____/20:00531521 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.conbuildmat.2020.120205" target="_blank" >https://doi.org/10.1016/j.conbuildmat.2020.120205</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2020.120205" target="_blank" >10.1016/j.conbuildmat.2020.120205</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of ageing conditions on the mineralogical micro-character of natural hydraulic lime mortars

Popis výsledku v původním jazyce

The investigation of the chemical composition and physical and mechanical properties of old building materials is relevant for planning restoration interventions and designing compatible restoration materials. The quality of the binders used in mortars determines their durability, and consequently, influences the durability of the building structures in which they are applied. Lime binders continuously undergo chemical alterations as they age. Moreover, weathering agents cumulatively affect their properties, which adds to the difficulty in identifying their original composition. The mineralogy and microstructure of the binders of three historic mortar specimens collected from medieval bridges in the Czech Republic and a mortar designed in the laboratory to mimic the composition of the historic specimens were characterised using thermogravimetry analysis with mass spectrometry, x-ray powder diffraction and scanning electron microscopy coupled with energy dispersive spectroscopy. Two specimens showed binder decalcification and the presence of metastable CaCO3 vaterite and aragonite polymorphs. A mortar of comparable age, which was not exposed to elevated moisture, contained no CaCO3 modification other than calcite.

Název v anglickém jazyce

Influence of ageing conditions on the mineralogical micro-character of natural hydraulic lime mortars

Popis výsledku anglicky

The investigation of the chemical composition and physical and mechanical properties of old building materials is relevant for planning restoration interventions and designing compatible restoration materials. The quality of the binders used in mortars determines their durability, and consequently, influences the durability of the building structures in which they are applied. Lime binders continuously undergo chemical alterations as they age. Moreover, weathering agents cumulatively affect their properties, which adds to the difficulty in identifying their original composition. The mineralogy and microstructure of the binders of three historic mortar specimens collected from medieval bridges in the Czech Republic and a mortar designed in the laboratory to mimic the composition of the historic specimens were characterised using thermogravimetry analysis with mass spectrometry, x-ray powder diffraction and scanning electron microscopy coupled with energy dispersive spectroscopy. Two specimens showed binder decalcification and the presence of metastable CaCO3 vaterite and aragonite polymorphs. A mortar of comparable age, which was not exposed to elevated moisture, contained no CaCO3 modification other than calcite.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA18-28142S" target="_blank" >GA18-28142S: Vliv lněného oleje na transportní vlastnosti vápenných nátěrů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Construction and Building Materials

ISSN

0950-0618

e-ISSN

—

Svazek periodika

264

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

120205

Kód UT WoS článku

000585942300039

EID výsledku v databázi Scopus

2-s2.0-85088839507