Publication detail

Long Term Behaviour of Portland Limestone Cement Concrete Exposed to Combined Chloride and Sulfate Environment. The Effect of Limestone Content and Mineral Admixtures

SOTIRIADIS, K. KOSÍKOVÁ, J. PETRÁNEK, V. TSIVILIS, S.

Original Title

Type

journal article - other

Language

English

Original Abstract

The long term behaviour of limestone cement concrete, stored in combined chloride and sulfate environment, was studied, taking into consideration the effect of both the limestone content of the cement used and the mineral admixtures addition. Concrete specimens of seven different compositions were prepared. Three of them were made from ordinary Portland cement and from two Portland limestone cements (limestone content: 15% and 35% w/w). The rest four compositions were prepared by substituting a certain amount of the limestone cement (15% w/w limestone content) with natural pozzolana, fly ash, blastfurnace slag or metakaolin. The specimens were immersed in four solutions of various sulfate and chloride contents and stored at 5oC. Visual assessment of the specimens and mass measurements took place up to 55 months. XRD analytical technique was used to identify thaumasite in the deteriorated parts of the specimens. Higher contents of limestone in cement and of sulfates in the storage solutions resulted in more intensive concrete damage. The use of mineral admixtures improved the behaviour of limestone cement concrete. After 24 months of exposure, chlorides delay the deterioration of limestone cement concretes caused by sulfates. After 55 months, the presence of chlorides led to a greater mass loss for them. The specimens containing mineral admixtures showed more intensive deterioration at 24 months when chlorides were present along with sulfates. Their mass seems to not be affected by chlorides. Fly ash was proved as the most efficient material to improve limestone cement concrete's performance, while concrete containing metakaolin suffered from significant damage after 55 months. XRD analysis showed that the damage observed was due to the formation of thaumasite.

Keywords

Limestone cement concrete; sulfate; chloride; mineral admixture; long term

Authors

SOTIRIADIS, K.; KOSÍKOVÁ, J.; PETRÁNEK, V.; TSIVILIS, S.

RIV year

2013

Released

14. 5. 2013

Location

švýcarsko

ISBN

1022-6680

Periodical

Advanced Materials Research

Year of study

2013

Number

688

State

Swiss Confederation

Pages from

185

Pages to

192

Pages count

BibTex

@article{BUT103314,
  author="Konstantinos {Sotiriadis} and Jana {Hodná} and Vít {Petránek} and Sotirios {Tsivilis}",
  title="Long Term Behaviour of Portland Limestone Cement Concrete Exposed to Combined Chloride and Sulfate Environment. The Effect of Limestone Content and Mineral Admixtures",
  journal="Advanced Materials Research",
  year="2013",
  volume="2013",
  number="688",
  pages="185--192",
  issn="1022-6680"
}