Publication detail

Rheological study on influence of hydroxypropyl derivatives of guar gum, cellulose, and chitosan on the properties of natural hydraulic lime pastes

ŽIŽLAVSKÝ, T. VYŠVAŘIL, M. ROVNANÍKOVÁ, P.

Original Title

Rheological study on influence of hydroxypropyl derivatives of guar gum, cellulose, and chitosan on the properties of natural hydraulic lime pastes

Type

conference paper

Language

English

Original Abstract

Viscosity enhancing admixtures are widely used to improve properties of concrete and ready-mix mortars. Guar gum derivatives and chitosan ethers are reported to have water-retaining effect, which is beneficial for the adhesion of the mixture as well as for the hydratation of hydraulic particles in the binder phase of concrete or natural hydraulic lime (NHL) mortars. Influence of addition of admixtures in doses of 1, 5, and 10‰ of the binder weight has been studied on NHL based pastes with constant water:binder ratio. The measurements were carried out on the Discovery HR-1 rheometer with DIN concentric cylinders geometry. The flow properties and viscoelastic properties were studied on the specified mixtures. Pastes expressed shear-thinning behaviour with thixotropic character of flow curves. Admixture addition caused increase of yield stress, fluidity index and consistency coefficient varying on the amount and type of the admixture. Differences in the effectivity of admixtures were observed, the dosage-dependency of the admixtures varied.

Keywords

natural hydraulic lime, theology, hydroxypropyl guar gum, hydroxypropyl chitosan, hydroxypropyl cellulose

Authors

ŽIŽLAVSKÝ, T.; VYŠVAŘIL, M.; ROVNANÍKOVÁ, P.

Released

14. 8. 2019

Publisher

IOP Publishing

ISBN

1757-8981

Periodical

IOP Conference Series: Materials Science and Engineering

Year of study

583

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

7

Pages count

7

URL

https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012009

BibTex

@inproceedings{BUT158092,
  author="Tomáš {Žižlavský} and Martin {Vyšvařil} and Pavla {Rovnaníková}",
  title="Rheological study on influence of hydroxypropyl derivatives of guar gum, cellulose, and chitosan on the properties of natural hydraulic lime pastes",
  booktitle="International Conference Building Materials, Products and Technologies",
  year="2019",
  journal="IOP Conference Series: Materials Science and Engineering",
  volume="583",
  number="1",
  pages="1--7",
  publisher="IOP Publishing",
  doi="10.1088/1757-899X/583/1/012009",
  issn="1757-8981",
  url="https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012009"
}