Publication detail

The Application of Air-Entraining Admixtures for the Development of Heat Insulating Moulded Refractory Concretes

BEDNÁREK, J. ŠOUKAL, F. NOVOTNÝ, R. LANG, K.

Original Title

Type

conference proceedings

Language

English

Original Abstract

The thesis deals with the possibility of kaolin suspensions specific weight lowering using air-entraining agents. These agents belong to the surfactants, i.e. materials, whose molecules are absorbed strongly in the air-water or solid-water interfaces. This property enables them to stabilize air bubbles created in the suspension during mixing. Air-entraining agents are usually used as concrete admixtures in concrete products exposed to the effects of frost or chemical defrosting agents. The goal of the thesis is to verify an alternative possibility of creating porous structure in kaolin suspensions in order to prepare heat insulating moulded refractory concretes without using lightweight fillers. The effect of several air-entraining agents was compared, after that the dosage of agent and mixing conditions were optimized. Stabilization of prepared foams and verification of the possibility of the combination of this method and the addition of lightweight fillers were also part of this thesis just as characterization of mechanical and thermal properties of prepared test specimens and the study of their inner structure.

Keywords

refractories, air-entraining agent, stabilization, mixing, dosing, filler, specific weight

Authors

BEDNÁREK, J.; ŠOUKAL, F.; NOVOTNÝ, R.; LANG, K.

Released

5. 12. 2014

Location

Brno

ISBN

978-80-214-5077-6

Pages from

Pages to

Pages count

BibTex

@proceedings{BUT112573,
  editor="Jan {Bednárek} and František {Šoukal} and Radoslav {Novotný} and Karel {Lang}",
  title="The Application of Air-Entraining Admixtures for the Development of Heat Insulating Moulded Refractory Concretes",
  year="2014",
  pages="51--51",
  address="Brno",
  isbn="978-80-214-5077-6"
}