Publication detail

Dlouhodobé fyzikálně mechanické vlastnosti vápenných malt s deriváty gumy guar

ŽIŽLAVSKÝ, T.

Original Title

Dlouhodobé fyzikálně mechanické vlastnosti vápenných malt s deriváty gumy guar

English Title

Long therm physical-mechanical properties of aerial lime-based mortars with guar gum derivatives

Type

journal article - other

Language

Czech

Original Abstract

V článku je experimentálně sledován vliv přídavku gumy guar a jejích derivátů jako přísad do vápenných malt na jejich vlastnosti v čerstvém stavu a na fyzikálně mechanické vlastnosti, především pevnost v tahu za ohybu a v tlaku, z dlouhodobého hlediska až do ročního stáří vzorků.

English abstract

This paper studies the possibility of usage of the guar gum and its derivatives as admixtures for aerial lime-based mortars. The influence on the properties of mortars was studied on the aerial lime–based mortars prepared with quartz fine grained sand and doses of admixtures ranging between 0,5 and 10 ‰. The hardened bulk densities, flexural and compressive strength, carbonation rate, workability though flow table test and air content in fresh mortar were studied. The addition of the hydroxypropyl guar (HPG) lowered the bulk density (due to an air intake), improved workability, slightly increased the strength and slowed carbonation rate. The addition of carboxymethylhydroxypropyl guar (CMHPG) does not impact the bulk density and air content in the fresh mortar, the strengths were increased similarly to HPG: it does not impact carbonation rate significantly, so the long term strengths were comparative with the HPG. The pure guaran was found not to be beneficial for the lime mortars.

Keywords

vápenná malta, guma guar, pevnost v tlaku, pevnost v tahu za ohybu, porozita

Key words in English

aerial lime-based mortar, guar gum, compressive stregth, flexural strength, porosity

Authors

ŽIŽLAVSKÝ, T.

Released

28. 5. 2018

Location

Praha

ISBN

1801-4399

Periodical

TZB-info

Year of study

2018

Number

22

State

Czech Republic

Pages from

1

Pages to

7

Pages count

7

URL

https://stavba.tzb-info.cz/beton-malty-omitky/17416-dlouhodobe-fyzikalne-mechanicke-vlastnosti-vapennych-malt-s-derivaty-gumy-guar

BibTex

@article{BUT147870,
  author="Tomáš {Žižlavský}",
  title="Dlouhodobé fyzikálně mechanické vlastnosti vápenných malt s deriváty gumy guar",
  journal="TZB-info",
  year="2018",
  volume="2018",
  number="22",
  pages="1--7",
  issn="1801-4399",
  url="https://stavba.tzb-info.cz/beton-malty-omitky/17416-dlouhodobe-fyzikalne-mechanicke-vlastnosti-vapennych-malt-s-derivaty-gumy-guar"
}