Detail publikace

Natural mineral rheology modifiers for lime-based grouts

ŽIŽLAVSKÝ, T. VYŠVAŘIL, M.

Originální název

Natural mineral rheology modifiers for lime-based grouts

Typ

abstrakt

Jazyk

angličtina

Originální abstrakt

The properties of injecting grouts are modified by various additives, the two most frequently used being pozzolanic additives to aid the strength development especially in the applications with limited air access and rheology modifiers responsible for good injectability, fluidity, and limited segregation. The most commonly used rheology modifiers are cellulose ethers used to increase viscosity and water retention, mitigating bleeding and segregation, and plasticisers/water reducers to improve fluidity and injectability while reducing the amount of water to values ensuring improved strength and durability. The work studies the effect of natural rheology modifiers on the rheology of lime based grouts. The modifiers used are attapulgite (palygorskite), montmorillonite, sepiolite, and wollastonite; three clay minerals and calcium inosilicate. These minerals affect rheology mainly though their fibrous structure, increasing thixotropy of the solution, improving suspension stability, and increasing yield stress and plastic viscosity. All the natural rheology modifiers studied showed promising results for further utilization in lime-based injection grouts. Sepiolite, in particular, may be suitable solely for its rheology modifying properties, while other additives seem to be more suitable as a combination of filler with added rheology modifying function and wollastonite, due the fibrous structure, also for improving the cohesion of the hardened grout. The rheology modifying function of thesethe additives has to be taken into account while using them in the injection grouts regardless of their main purpose in the mixture.

Klíčová slova

lime-based grout; rheology modifier; rheology; flow properties; viscoelastic properties

Autoři

ŽIŽLAVSKÝ, T.; VYŠVAŘIL, M.

Vydáno

1. 9. 2025

Nakladatel

Edizioni Quasar

Místo

Roma

ISBN

978-88-5491-636-4

Kniha

7th Historic Mortars Conference (HMC 2025), Padova

Strany od

581

Strany do

583

Strany počet

3

URL

https://hmc2025.com/wp-content/uploads/2025/07/HMC-2025_Book-of-Extended-Abstracts.pdf

BibTex

@misc{BUT198720,
  author="Tomáš {Žižlavský} and Martin {Vyšvařil}",
  title="Natural mineral rheology modifiers for lime-based grouts",
  booktitle="7th Historic Mortars Conference (HMC 2025), Padova",
  year="2025",
  pages="581--583",
  publisher="Edizioni Quasar",
  address="Roma",
  isbn="978-88-5491-636-4",
  url="https://hmc2025.com/wp-content/uploads/2025/07/HMC-2025_Book-of-Extended-Abstracts.pdf",
  note="abstract"
}