Reactivity of natural pozzolans in lime mortars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F23%3APU150256" target="_blank" >RIV/00216305:26110/23:PU150256 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Reactivity of natural pozzolans in lime mortars

Popis výsledku v původním jazyce

Today, lime-pozzolan mortars are being used in the repair of historic buildings, replacing the lime-cement mortars that were previously used in this practice, but were incompatible with historic mortars. In this paper, the pozzolanic reactivity of seven different natural finely ground thermally untreated pozzolans (trass, pozzolanic earth, chalcedonite, pumice, zeolite, spongilite and lava) in lime mortars is investigated. All lime-pozzolan mortars achieved higher strengths than the reference lime mortar, especially after 90 and 180 days. Surprisingly, no clear correlation was observed between the pozzolanic activity of the natural pozzolans, determined by the Chapelle test, and the strength of the mortars. In order to successfully assess the reactivity of a pozzolan, it is not sufficient to determine just the pozzolanic activity, but it is also necessary to know its mineralogical composition and the chemical composition of the amorphous phases in detail and simulate the practical use of the lime-pozz

Název v anglickém jazyce

Reactivity of natural pozzolans in lime mortars

Popis výsledku anglicky

Today, lime-pozzolan mortars are being used in the repair of historic buildings, replacing the lime-cement mortars that were previously used in this practice, but were incompatible with historic mortars. In this paper, the pozzolanic reactivity of seven different natural finely ground thermally untreated pozzolans (trass, pozzolanic earth, chalcedonite, pumice, zeolite, spongilite and lava) in lime mortars is investigated. All lime-pozzolan mortars achieved higher strengths than the reference lime mortar, especially after 90 and 180 days. Surprisingly, no clear correlation was observed between the pozzolanic activity of the natural pozzolans, determined by the Chapelle test, and the strength of the mortars. In order to successfully assess the reactivity of a pozzolan, it is not sufficient to determine just the pozzolanic activity, but it is also necessary to know its mineralogical composition and the chemical composition of the amorphous phases in detail and simulate the practical use of the lime-pozz

Druh

O - Ostatní výsledky

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