Detail publikace

Bond Properties of NHL-Based Mortars with Viscosity-Modifying Water-Retentive Admixtures

ŽIŽLAVSKÝ, T. BAYER, P. VYŠVAŘIL, M.

Originální název

Bond Properties of NHL-Based Mortars with Viscosity-Modifying Water-Retentive Admixtures

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This article studies the influence of biopolymeric viscosity-modifying admixtures with water-retentive function on the physico-mechanical properties of natural hydraulic lime-based mortars and their adherence to the traditional fired-clay brick substrate. The use of admixtures increases the water/binder ratio, which in turn leads to a decrease in the strength of the mortars. The viscosity-modifying function improves the adhesive strength between mortar and pre-wetter brick by increasing the binder paste viscosity, while the water-retentive function along with increased water content may lead to a decrease in adhesive strength. On the contrary, water retention and increased water content are beneficial on a dry surface, while paste viscosity plays only a minor role. When subjected to temperature-varying cycles, the mortars are more prone to in-mortar failure during the pull-off test. The air-entraining function of some admixtures improves the frost resistance of the mortars; however, it would negatively affect the adhesive strength by incorporating pores into the contact zone between the mortar and brick substrate. This study showed that the use of some of the studied admixtures may improve the adhesion of mortar to the brick substrate.

Klíčová slova

NHL-based mortar; viscosity-modifying admixture; water retention; air content; adhesive strength; flexural strength; compressive strength; porosity; hygric properties; contact zone

Autoři

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

Vydáno

25. 6. 2021

Nakladatel

MDPI

Místo

Basel, Switzerland

ISSN

2075-163X

Periodikum

Minerals

Ročník

11

Číslo

7

Stát

Švýcarská konfederace

Strany od

1

Strany do

16

Strany počet

16

URL

https://www.mdpi.com/2075-163X/11/7/685

Plný text v Digitální knihovně

http://hdl.handle.net/11012/200959

BibTex

@article{BUT171901,
  author="Tomáš {Žižlavský} and Patrik {Bayer} and Martin {Vyšvařil}",
  title="Bond Properties of NHL-Based Mortars with Viscosity-Modifying Water-Retentive Admixtures",
  journal="Minerals",
  year="2021",
  volume="11",
  number="7",
  pages="1--16",
  doi="10.3390/min11070685",
  issn="2075-163X",
  url="https://www.mdpi.com/2075-163X/11/7/685"
}