Publication detail

Supersulphated cements from waste materials

BÍLEK s.r., V., BUJDOŠ D., PEŠATA M., PROCHÁZKA M., BÍLEK j.r. V., SOUSEDÍK B.

Original Title

Supersulphated cements from waste materials

Type

conference paper

Language

English

Original Abstract

Supersulphated cements are considered to be one of the first alkali-activated cements. Ground granulated blast-furnace slag is activated with a small amount of Portland cement in the presence of gypsum, providing C-S-H gel and ettringite as the main reaction products. These materials exhibit some good properties; the most important of these being good sulphate resistance and also good environmental effects. Standard EN15743+A1 "Supersulphated cement" describes the conditions for the composition of this binder. In this paper, the product after desulphurisation (PPR) from the Třebovice heating plant (Ostrava) was used as a source of gypsum. Strength development was recorded up to 91 days for different ratios of compounds. Early strengths are very low and are higher for higher ordinary Portland cement content. At 28 and 91 days of age the strengths are almost the same for gypsum contents from 10 to 20% and all cement contents (2.5, 3.75% and 5%). These strengths are relatively high - around 50 MPa. Supersulphated cements can be a good choice for the use of waste material - the product after desulphurisation.

Keywords

fly ash; gypsum; GGBFS; supersulphated cement

Authors

BÍLEK s.r., V., BUJDOŠ D., PEŠATA M., PROCHÁZKA M., BÍLEK j.r. V., SOUSEDÍK B.

Released

1. 7. 2022

Publisher

American Concrete Institute

Location

Milán

ISBN

978-1-64195-184-5

Book

SP-355: Recent Advances in Concrete Technology and Sustainability Issues

ISBN

0193-2527

Periodical

Publication SP - American Concrete Institute

State

unknown

Pages from

375

Pages to

382

Pages count

8

BibTex

@inproceedings{BUT182235,
  author="Vlastimil {Bílek}",
  title="Supersulphated cements from waste materials",
  booktitle="SP-355: Recent Advances in Concrete Technology and Sustainability Issues",
  year="2022",
  journal="Publication SP - American Concrete Institute",
  pages="375--382",
  publisher="American Concrete Institute",
  address="Milán",
  isbn="978-1-64195-184-5",
  issn="0193-2527"
}