Publication result detail

Use of fluidized bed combustion fly ash as addition reducing shrinkage of concrete

OSUSKÁ, L.; HELA, R.

Original Title

Use of fluidized bed combustion fly ash as addition reducing shrinkage of concrete

English Title

Use of fluidized bed combustion fly ash as addition reducing shrinkage of concrete

Type

Paper in proceedings (conference paper)

Original Abstract

Volumetric changes during ageing belong to natural properties of concrete. These changes, either growing or shrinking, can present a problem, which has to be taken into account during design and realization phases. This phenomenon is influenced by various factors and volumetric changes can be eliminated in many ways. One of the possibilities is setting appropriate combination of input materials and use of special additions and admixtures. This paper focused on verification of the method reducing shrinkage of concrete by means of using high temperature combustion fly ash combined with fluidized bed combustion fly ash as addition. The precondition is growth of new forms, in particular primary ettringite and monosulphate, which form because of the content free lime and sulphates in fluidized fly ash. If these minerals are formed in fresh concrete, they can positive prevent shrinkage without destruction of the composite material.

English abstract

Volumetric changes during ageing belong to natural properties of concrete. These changes, either growing or shrinking, can present a problem, which has to be taken into account during design and realization phases. This phenomenon is influenced by various factors and volumetric changes can be eliminated in many ways. One of the possibilities is setting appropriate combination of input materials and use of special additions and admixtures. This paper focused on verification of the method reducing shrinkage of concrete by means of using high temperature combustion fly ash combined with fluidized bed combustion fly ash as addition. The precondition is growth of new forms, in particular primary ettringite and monosulphate, which form because of the content free lime and sulphates in fluidized fly ash. If these minerals are formed in fresh concrete, they can positive prevent shrinkage without destruction of the composite material.

Keywords

Shrinkage, high temperature combustion fly ash, fluidized bed combustion fly ash, addition

Key words in English

Shrinkage, high temperature combustion fly ash, fluidized bed combustion fly ash, addition

Authors

OSUSKÁ, L.; HELA, R.

RIV year

2017

Released

11.08.2016

Publisher

Trans Tech Publication

Location

Switzerland

Book

Binders, Materials and Technologies in Modern Construction II

ISBN

1662-9752

Periodical

Materials Science Forum

Number

865

State

Swiss Confederation

Pages from

141

Pages to

144

Pages count

4

URL

http://www.scientific.net/MSF.865.141

BibTex

@inproceedings{BUT122710,
  author="Lucia {Ťažká} and Rudolf {Hela}",
  title="Use of fluidized bed combustion fly ash as addition reducing shrinkage of concrete",
  booktitle="Binders, Materials and Technologies in Modern Construction II",
  year="2016",
  journal="Materials Science Forum",
  number="865",
  pages="141--144",
  publisher="Trans Tech Publication",
  address="Switzerland",
  doi="10.4028/www.scientific.net/MSF.865.141",
  issn="1662-9752",
  url="http://www.scientific.net/MSF.865.141"
}