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Title
Possible use of selected types of fly ash in the technology of caving goaf sealing

ISSN printed: 1733-8670, ISSN on-line: 2392-0378
Pierzyna, Piotr1
URI: https://repository.am.szczecin.pl/handle/123456789/2814
2024-03-30
This article presents selected properties of mixtures produced from two types of fly ashes from one coal-fired power plant. Mixtures made of fly ashes from a conventional boiler without flue gas desulfurization products (10 01 02) and from a fluidized bed boiler with flue gas desulfurization products (10 01 82) are subjected to testing. The mixtures are prepared using mine water. The tested mixtures are characterized by a liquid consistency in terms of flowability in a range from 160 mm to 280 mm. The mixtures made of 10 01 82 ashes show twice as much water demand, shorter setting time, and higher strength than those made of 10 01 02 ashes, but, unfortunately, they have a much higher volume of excess water. Moreover, the mixtures of 10 01 82 ash do not undergo full slaking, in contrast to the mixtures of 10 01 02 ash (conventional boiler). The requirements of the PN-G 11011:1998 standard, relative to the discussed parameters, are met by the mixtures made on the basis of ash 10 01 82 originating from a fluidized bed boiler in terms of flowability of up to 240 mm. This is the ash type useable in sealing technology.
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Title

Possible use of selected types of fly ash in the technology of caving goaf sealing

Pages

Figures

6

Tables

1

ISSN printed

1733-8670

ISSN on-line

2392-0378

DOI

10.17402/597

Type

Original scientific article

Journal

77 Scientific Journals of the Maritime University of Szczecin, no. 77 / 2024

Publisher

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Copyright Holder

Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie

Published

2024-03-30

Recieved

2023-05-07

Accepted

2024-03-05

Funding

No data

Keywords

fly ash, UPS, mining, backfill mixtures, waste disposal

URI:

https://repository.am.szczecin.pl/handle/123456789/2814

Language

English

Authors

Pierzyna, Piotr1

Affiliation

1 Silesian University of Technology in Gliwice Faculty of Mining, Safety Engineering and Industrial Automation, piotr.pierzyna@polsl.pl

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