Chemical and microstructural characterisation of lime and lime-metakaolin pastes with linseed oil

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F19%3A00503611" target="_blank" >RIV/68378297:_____/19:00503611 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.grad.unizg.hr/_download/repository/RILEM_SMSS_New_generation_of_construction_materials.pdf" target="_blank" >http://www.grad.unizg.hr/_download/repository/RILEM_SMSS_New_generation_of_construction_materials.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Chemical and microstructural characterisation of lime and lime-metakaolin pastes with linseed oil

Popis výsledku v původním jazyce

Linseed oil has been used since the Classical times as a water-repellent additive in lime mortars and other types of lime-based coatings to protect building structures exposed to severe weathering conditions, e.g., direct exposure to wind-driven rain. Recent studies have confirmed the potential of this environmentally-friendly additive in improving the durability of lime-based mortars. This study aims to investigate the effect of linseed oil on the microstructure of lime and lime-metakaolin pastes. The specimens were analyzed after a long period of curing in laboratory conditions. The results of thermal analysis, Fourier transform infrared spectroscopy, and powder X-ray powder diffraction (XRPD) demonstrated that linseed oil significantly hindered the carbonation reaction in both lime and lime-metakaolin pastes. Scanning electron microscopy analysis showed the presence of large hexagonal crystals of portlandite in the lime paste with linseed oil. The lime-metakaolin pastes exhibited common calcium silicate hydrates morphologies (fibres, flakes) and the paste with linseed oil exhibited a denser structure than the reference. This observation was in line with the results of XRPD quantitative phase analysis which indicated the double content of amorphous phases in the specimen with linseed oil in comparison with the reference. The results confirm previous indication that linseed oil can have a beneficial effect on the hardening reaction of lime-metakaolin by favoring hydration reactions to the detrimen.

Název v anglickém jazyce

Chemical and microstructural characterisation of lime and lime-metakaolin pastes with linseed oil

Popis výsledku anglicky

Linseed oil has been used since the Classical times as a water-repellent additive in lime mortars and other types of lime-based coatings to protect building structures exposed to severe weathering conditions, e.g., direct exposure to wind-driven rain. Recent studies have confirmed the potential of this environmentally-friendly additive in improving the durability of lime-based mortars. This study aims to investigate the effect of linseed oil on the microstructure of lime and lime-metakaolin pastes. The specimens were analyzed after a long period of curing in laboratory conditions. The results of thermal analysis, Fourier transform infrared spectroscopy, and powder X-ray powder diffraction (XRPD) demonstrated that linseed oil significantly hindered the carbonation reaction in both lime and lime-metakaolin pastes. Scanning electron microscopy analysis showed the presence of large hexagonal crystals of portlandite in the lime paste with linseed oil. The lime-metakaolin pastes exhibited common calcium silicate hydrates morphologies (fibres, flakes) and the paste with linseed oil exhibited a denser structure than the reference. This observation was in line with the results of XRPD quantitative phase analysis which indicated the double content of amorphous phases in the specimen with linseed oil in comparison with the reference. The results confirm previous indication that linseed oil can have a beneficial effect on the hardening reaction of lime-metakaolin by favoring hydration reactions to the detrimen.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

International conference on sustainable materials, systems and structures - SMSS 2019. New generation of construction materials

ISBN

978-2-35158-223-7

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

378-385

Název nakladatele

RILEM Publications S.A.R.L.

Místo vydání

Paris

Místo konání akce

Rovinj

Datum konání akce

20. 3. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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