Effect of Lightweight Fillers on the Rheological Properties Lime Grouts

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Effect of Lightweight Fillers on the Rheological Properties Lime Grouts

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA25-15748S" target="_blank" >GA25-15748S: Lime-based injection grouts with biopolymeric and biotech admixtures to repair the surfaces of historic architecture</a><br>

Continuities

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

Publication year

2026

Confidentiality

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

Article name in the collection

Materials Science Forum

ISBN

—

ISSN

1662-9752

e-ISSN

—

Number of pages

7

Pages from-to

117-123

Publisher name

Trans Tech Publications Ltd

Place of publication

—

Event location

18.10.2025

Event date

Oct 16, 2025

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

—