Publication detail

The ash from fluidized bed combustion as a donor of sulfates to the Portland clinker

HANISKOVÁ, D. BARTONÍČKOVÁ, E. KOPLÍK, J. OPRAVIL, T.

Original Title

The ash from fluidized bed combustion as a donor of sulfates to the Portland clinker

English Title

The ash from fluidized bed combustion as a donor of sulfates to the Portland clinker

Type

conference paper

Language

en

Original Abstract

The paper deals with possibilities of using solid residues from fluidized bed combustion of coal, bed and filter ash in the production of composite Portland cements. The ash from fluidized bed combustion contains a high amount of CaO, in the form of free lime or CaSO4 (anhydrite), so it could be used as a possible donor of sulfates to the Portland clinker instead of usually used gypsum. At first, the chemical composition of collected ashes was determined by X-Ray Fluorescence and the ongoing hydration process was monitored by isoperibolic calorimetry. Then samples containing mixtures of Portland clinker and ash were prepared. Their respective compressive strength and flexural strength were analyzed and observations were made on the hydration and composition of products of the hydration reaction detected by X-Ray diffraction. Finally, the results of selected mixtures were verified with prepared standardized mortars.

English abstract

The paper deals with possibilities of using solid residues from fluidized bed combustion of coal, bed and filter ash in the production of composite Portland cements. The ash from fluidized bed combustion contains a high amount of CaO, in the form of free lime or CaSO4 (anhydrite), so it could be used as a possible donor of sulfates to the Portland clinker instead of usually used gypsum. At first, the chemical composition of collected ashes was determined by X-Ray Fluorescence and the ongoing hydration process was monitored by isoperibolic calorimetry. Then samples containing mixtures of Portland clinker and ash were prepared. Their respective compressive strength and flexural strength were analyzed and observations were made on the hydration and composition of products of the hydration reaction detected by X-Ray diffraction. Finally, the results of selected mixtures were verified with prepared standardized mortars.

Keywords

Portland clinker; fluidized bed combustion ash; compressive strength; flexural strength; reaction of hydration.

Released

03.08.2016

Publisher

Elsevier

ISBN

1877-7058

Periodical

Procedia Engineering

Year of study

151

Number

2016

State

NL

Pages from

394

Pages to

401

Pages count

8

URL

Full text in the Digital Library

Documents

BibTex


@inproceedings{BUT127086,
  author="Denisa {Beranová} and Eva {Bartoníčková} and Jan {Koplík} and Tomáš {Opravil}",
  title="The ash from fluidized bed combustion as a donor of sulfates to the Portland clinker",
  annote="The paper deals with possibilities of using solid residues from fluidized bed combustion of coal, bed and filter ash in the production of composite Portland cements. The ash from fluidized bed combustion contains a high amount of CaO, in the form of free lime or CaSO4 (anhydrite), so it could be used as a possible donor of sulfates to the Portland clinker instead of usually used gypsum. At first, the chemical composition of collected ashes was determined by X-Ray Fluorescence and the ongoing hydration process was monitored by isoperibolic calorimetry. Then samples containing mixtures of Portland clinker and ash were prepared. Their  respective  compressive  strength and flexural strength were analyzed  and  observations  were  made  on  the  hydration and composition of products of the hydration reaction  detected by X-Ray diffraction. Finally, the results of selected mixtures  were verified with prepared standardized mortars.",
  address="Elsevier",
  booktitle="procedia engineering",
  chapter="127086",
  doi="10.1016/j.proeng.2016.07.392",
  howpublished="online",
  institution="Elsevier",
  number="2016",
  year="2016",
  month="august",
  pages="394--401",
  publisher="Elsevier",
  type="conference paper"
}