Publication detail

Physico-mechanical and microstructural properties of rehydrated blended cement pastes

VYŠVAŘIL, M. BAYER, P. CHROMÁ, M. ROVNANÍKOVÁ, P.

Original Title

Physico-mechanical and microstructural properties of rehydrated blended cement pastes

English Title

Physico-mechanical and microstructural properties of rehydrated blended cement pastes

Type

journal article - other

Language

en

Original Abstract

This study aims to investigate the effect of high temperatures of up to 1200 C and rehydration on the mechanical properties, microstructure and phase composition of blended cement pastes prepared from Portland cement (PC), granulated blast furnace slag (GBFS), high-temperature fly ash (FA) and ground limestone (GL). It has been found that the heating process induces a reduction in bulk density, flexural and compressive strength. The proportion of pores with a diameter higher than 0.1 micrometer increases with increasing temperature. The addition of GBFS or FA improves the strength properties of dehydrated cement paste (DCP), but this effect was not observed after rehydration. Cement paste with added GBFS has the best resistivity to high temperatures, but after rehydration, GL cement paste shows better mechanical properties.

English abstract

This study aims to investigate the effect of high temperatures of up to 1200 C and rehydration on the mechanical properties, microstructure and phase composition of blended cement pastes prepared from Portland cement (PC), granulated blast furnace slag (GBFS), high-temperature fly ash (FA) and ground limestone (GL). It has been found that the heating process induces a reduction in bulk density, flexural and compressive strength. The proportion of pores with a diameter higher than 0.1 micrometer increases with increasing temperature. The addition of GBFS or FA improves the strength properties of dehydrated cement paste (DCP), but this effect was not observed after rehydration. Cement paste with added GBFS has the best resistivity to high temperatures, but after rehydration, GL cement paste shows better mechanical properties.

Keywords

cement paste; rehydration; strength; porosity; microstructure

RIV year

2014

Released

15.03.2014

ISBN

0950-0618

Periodical

Construction and building materials

Year of study

2014

Number

54

State

GB

Pages from

413

Pages to

420

Pages count

8

Documents

BibTex 


@article{BUT107712,
  author="Martin {Vyšvařil} and Patrik {Bayer} and Markéta {Rovnaníková} and Pavla {Rovnaníková}",
  title="Physico-mechanical and microstructural properties of rehydrated blended cement pastes",
  annote="This study aims to investigate the effect of high temperatures of up to 1200 C and rehydration on the mechanical properties, microstructure and phase composition of blended cement pastes prepared from Portland cement (PC), granulated blast furnace slag (GBFS), high-temperature fly ash (FA) and ground limestone (GL). It has been found that the heating process induces a reduction in bulk density, flexural and compressive strength. The proportion of pores with a diameter higher than 0.1 micrometer increases with increasing temperature. The addition of GBFS or FA improves the strength properties of dehydrated cement paste (DCP), but this effect was not observed after rehydration. Cement paste with added GBFS has the best resistivity to high temperatures, but after rehydration, GL cement paste shows better mechanical properties.",
  chapter="107712",
  number="54",
  volume="2014",
  year="2014",
  month="march",
  pages="413--420",
  type="journal article - other"
}