Detail publikace

Mikrostrukturní změny jemnozrnných betonů po ročním působení kyseliny sírové

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

Originální název

Mikrostrukturní změny jemnozrnných betonů po ročním působení kyseliny sírové

Anglický název

Microstructural changes of fine-grained concretes after the one year treatement in sulfuric acid

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

čeština

Originální abstrakt

In sewer collection systems there exists a corrosion problem involving the destruction of concrete pipes or structures by sulfuric acid produced by sulfur-oxidizing bacteria from hydrogen sulfide. This type of corrosion is termed microbiologically induced corrosion (MIC), or more precisely biogenic sulfuric acid corrosion. Present study is focused on the effect of 0.5% sulfuric acid, simulating biogenic sulfuric acid corrosion, on microstructural changes of various types of concrete after one year of treatment. Microstructural changes have been investigated by mercury intrusion porosimetry and scanning electron microscopy. It was found that the greatest changes in porosity and microstructure occured in the sample made from Portland cement and with the high temperature fly ash one. The pores of the samples were filled by crystals of gypsum, ettringite, calcite and portlandite and also by Al(OH)3 in the form of hollow sticks.

Anglický abstrakt

In sewer collection systems there exists a corrosion problem involving the destruction of concrete pipes or structures by sulfuric acid produced by sulfur-oxidizing bacteria from hydrogen sulfide. This type of corrosion is termed microbiologically induced corrosion (MIC), or more precisely biogenic sulfuric acid corrosion. Present study is focused on the effect of 0.5% sulfuric acid, simulating biogenic sulfuric acid corrosion, on microstructural changes of various types of concrete after one year of treatment. Microstructural changes have been investigated by mercury intrusion porosimetry and scanning electron microscopy. It was found that the greatest changes in porosity and microstructure occured in the sample made from Portland cement and with the high temperature fly ash one. The pores of the samples were filled by crystals of gypsum, ettringite, calcite and portlandite and also by Al(OH)3 in the form of hollow sticks.

Klíčová slova

beton, síranová koroze, sádrovec, ettringit, mikrostruktura, porozita

Klíčová slova v angličtině

concrete, sulfate attack, gypsum, ettringite, microstructure, porosity

Autoři

VYŠVAŘIL, M.; ROVNANÍKOVÁ, M.; BAYER, P.

Rok RIV

2015

Vydáno

3. 6. 2015

ISBN

978-80-214-5205-3

Kniha

CONSTRUMAT 2015

Číslo edice

1.

ISSN

NEUVEDENO

Strany od

1

Strany do

7

Strany počet

7

BibTex

@inproceedings{BUT114934,
  author="Martin {Vyšvařil} and Markéta {Rovnaníková} and Patrik {Bayer}",
  title="Mikrostrukturní změny jemnozrnných betonů po ročním působení kyseliny sírové",
  booktitle="CONSTRUMAT 2015",
  year="2015",
  number="1.",
  pages="1--7",
  isbn="978-80-214-5205-3"
}