Effect of Lightweight Fillers on the Rheological Properties of Lime Grouts

Martin Vyšvařil; Stanislav Paseka; František Pticen

doi:10.4028/p-JJD62t

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A Bronze Button from Late Bronze Age Site of Inzersdorf ob der Traisen
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Roman Bronze Objects from the Archaeological Site of Burg in Burgenland, Austria
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Fresh State Performance of Concrete with Recycled Glass Powder as Cement Replacement and Nanosilica
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Mechanical and Environmental Performance of Concrete with Partial Replacement of Cement by Silica Fume and Scallop Shell Powder in Coastal Areas
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Concrete Industry’s Transition from CEMI to CEMII – A Case Study on CO₂ Footprint Reduction for a Self-Compacting Concrete Mix
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A Global Perspective on the Use of Mine Tailings in Concrete: Developments and Trends through Bibliometric Analysis
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Effect of Lightweight Fillers on the Rheological Properties of Lime Grouts
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HomeMaterials Science ForumMaterials Science Forum Vol. 1180Effect of Lightweight Fillers on the Rheological...

Effect of Lightweight Fillers on the Rheological Properties of Lime Grouts

Abstract:

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.