Detail publikace

Quality of the structure of ash bodies based on different types of ash

ČERNÝ, V.

Originální název

Quality of the structure of ash bodies based on different types of ash

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Artificial aggregates based on the self-firing process are often produced with an outdated technology without innovations and research. The knowledge of the production of ceramic materials is useful, but fly ash is quite a heterogeneous material influenced by the thermal processes occurring during the production; therefore, this problem has to be solved. The aim of the research work was to evaluate the influence of the character of fly ash on the formation, structure and properties of a sintered fly-ash body using laboratory firings. The main difference as regards the behavior is between the fly ash originating from high temperature and the one originating from fluidized-bed combustion. While the first type of ash contains mainly mullite and other high-temperature minerals, the fluidized-bed-combustion ash contains mainly anhydrite and free lime. These increase, for example, the manipulation strength of a fly-ash mix, but they also increase the amount of mixing water and weaken a sintered fly-ash body. The content of Fe2O3 and its modifications and the proportion of SiO2 in the amorphous phase or mullite are important parameters for evaluating various types of high-temperature combustion fly ashes. The content of Fe2O3 together with carbon finally works as a very effective fluxing agent. Thus, the surface of a specimen was sintered and the swelling was considerable due to the product gases of CO and CO2. A higher proportion of SiO2 contained in the amorphous phase increases the strength and the quality of a fly-ash body. A higher proportion of SiO2 in the crystal phase requires a higher amount of heat for obtaining a solid structure.

Klíčová slova

Artificial aggregate; Bottom ash; Clinkering; FBC ash; Fly ash; Sintering

Autoři

ČERNÝ, V.

Rok RIV

2015

Vydáno

14. 9. 2015

Nakladatel

IMT

Místo

Slovenija

ISSN

1580-2949

Periodikum

Materiali in tehnologije

Ročník

49

Číslo

4

Stát

Slovinská republika

Strany od

601

Strany do

605

Strany počet

5

URL

http://mit.imt.si/Revija/izvodi/mit154/cerny.pdf

BibTex

@article{BUT116457,
  author="Vít {Černý}",
  title="Quality of the structure of ash bodies based on different types of ash",
  journal="Materiali in tehnologije",
  year="2015",
  volume="49",
  number="4",
  pages="601--605",
  doi="10.17222/mit.2014.207",
  issn="1580-2949",
  url="http://mit.imt.si/Revija/izvodi/mit154/cerny.pdf"
}