Publication detail

Alkali-activated aluminosilicate composite with heat-resistant lightweight aggregates exposed to high temperatures: Mechanical and water transport properties.

ZUDA, L. DRCHALOVÁ, J. ROVNANÍK, P. BAYER, P. KERŠNER, Z. ČERNÝ, R.

Original Title

Alkali-activated aluminosilicate composite with heat-resistant lightweight aggregates exposed to high temperatures: Mechanical and water transport properties.

Type

journal article - other

Language

English

Original Abstract

A lightweight composite material with alkali-activated aluminosilicate binder is investigated. The intended use of this material is the high-temperature applications, such as the fire-protecting layers for Portland-cement based structures. Therefore, a heat-resistant mixture of expanded vermiculite and electrical porcelain is used as aggregates. Basic physical characteristics, mechanical properties and waterand water vapor transport properties are studied as functions of previous heat treatment up to 1200 C. Experimental results show that the studied material has very good high-temperature properties which are quite superior to Portland-cement concrete. The open porosity increases only up to 7% between room temperature and 1000 C. The material keeps 35% of its original compressive strength and 66% of its flexural strength even in the worst case of 800 C pre-heating. After pre-heating to 1200 C the compressive strength is found 30% higher and flexural strength three and-half times higher than in the reference state. Liquid moisture diffusivity is after the heat treatment up to three orders of magnitude higher than in reference room-temperature conditions. The water vapor transport parameters allow fast removal of water vapor and other gaseous compounds over the whole studied heat-treatment range.

Keywords

Alkali-activated aluminosilicate composites, Vermiculite, Mechanical properties, Water transport properties, Thermal load

Authors

ZUDA, L.; DRCHALOVÁ, J.; ROVNANÍK, P.; BAYER, P.; KERŠNER, Z.; ČERNÝ, R.

RIV year

2010

Released

1. 2. 2010

Publisher

Elsevier

ISBN

0958-9465

Periodical

CEMENT & CONCRETE COMPOSITES

Year of study

32

Number

2

State

United Kingdom of Great Britain and Northern Ireland

Pages from

157

Pages to

163

Pages count

7

BibTex

@article{BUT48049,
  author="Lucie {Zuda} and Jaroslava {Drchalová} and Pavel {Rovnaník} and Patrik {Bayer} and Zbyněk {Keršner} and Robert {Černý}",
  title="Alkali-activated aluminosilicate composite with heat-resistant lightweight aggregates exposed to high temperatures: Mechanical and water transport properties.",
  journal="CEMENT & CONCRETE COMPOSITES",
  year="2010",
  volume="32",
  number="2",
  pages="157--163",
  issn="0958-9465"
}