Effect of Lightweight Fillers on the Rheological Properties Lime Grouts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F26%3A0201787" target="_blank" >RIV/00216305:26110/26:0201787 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/p-JJD62t" target="_blank" >http://dx.doi.org/10.4028/p-JJD62t</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/p-JJD62t" target="_blank" >10.4028/p-JJD62t</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Lightweight Fillers on the Rheological Properties Lime Grouts

Popis výsledku v původním jazyce

The bulk density of the injection grout is an important factor, as its additional weight could cause damage to hardened decorative plasters. This can be particularly noticeable on larger surfaces. This study used five types of lightweight filler as a density-reducing component in hydrated lime-based grouts. The commonly used limestone filler was completely replaced by an expanded or granulated filler with a loose bulk density of up to 900 kg m−³; the rheological properties of the prepared grouts were then studied using a hybrid rheometer. The lime grouts were non-Newtonian, shear-thickening fluids exhibiting rheopectic behaviour (i.e. they stiffened over time). The type of filler dramatically affected the flowability of the grouts. The yield stress and plastic viscosity of the grouts decreased when lightweight fillers were used. As the filler density decreased, the grouts became expectantly less stiff. However, they showed a higher proportion of elastic behaviour than viscous behaviour, indicating that they have a strong microstructure that is resistant to external influences. There was no increase in loss factor values at higher frequencies, indicating that there was no separation of the liquid from the grout structure. From a rheological point of view, expanded glass appeared to be the most effective of the lightweight fillers used.

Název v anglickém jazyce

Effect of Lightweight Fillers on the Rheological Properties Lime Grouts

Popis výsledku anglicky

The bulk density of the injection grout is an important factor, as its additional weight could cause damage to hardened decorative plasters. This can be particularly noticeable on larger surfaces. This study used five types of lightweight filler as a density-reducing component in hydrated lime-based grouts. The commonly used limestone filler was completely replaced by an expanded or granulated filler with a loose bulk density of up to 900 kg m−³; the rheological properties of the prepared grouts were then studied using a hybrid rheometer. The lime grouts were non-Newtonian, shear-thickening fluids exhibiting rheopectic behaviour (i.e. they stiffened over time). The type of filler dramatically affected the flowability of the grouts. The yield stress and plastic viscosity of the grouts decreased when lightweight fillers were used. As the filler density decreased, the grouts became expectantly less stiff. However, they showed a higher proportion of elastic behaviour than viscous behaviour, indicating that they have a strong microstructure that is resistant to external influences. There was no increase in loss factor values at higher frequencies, indicating that there was no separation of the liquid from the grout structure. From a rheological point of view, expanded glass appeared to be the most effective of the lightweight fillers used.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA25-15748S" target="_blank" >GA25-15748S: Vápenné injektáže s biopolymerními a biotechnologickými přísadami k opravám povrchů historických staveb</a><br>

Návaznosti

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

Rok uplatnění

2026

Kód důvěrnosti údajů

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

Název statě ve sborníku

Materials Science Forum

ISBN

—

ISSN

1662-9752

e-ISSN

—

Počet stran výsledku

7

Strana od-do

117-123

Název nakladatele

Trans Tech Publications Ltd

Místo vydání

—

Místo konání akce

18.10.2025

Datum konání akce

16. 10. 2025

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—