Self-cleaning ability of gypsum-cement-pozzolan binders based on thermally processed red gypsum waste of titanium oxide manufacture

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F24%3A00584263" target="_blank" >RIV/68378297:_____/24:00584263 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jobe.2024.109009" target="_blank" >https://doi.org/10.1016/j.jobe.2024.109009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jobe.2024.109009" target="_blank" >10.1016/j.jobe.2024.109009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Self-cleaning ability of gypsum-cement-pozzolan binders based on thermally processed red gypsum waste of titanium oxide manufacture

Popis výsledku v původním jazyce

A recycling solution for landfilled red gypsum waste originating from titanium oxide manufacture (sulfate method), is proposed. The waste consisted mainly of gypsum, goethite, and free titanium oxide as indicated by thermal and x-ray diffraction analyses, and scanning electron microscopy. Photocatalytically active beta gypsum, with physical properties typical for building gypsum, was obtained by thermal treatment (140–190 ◦C) of the waste. On its basis, gypsum-cement-pozzolan binders of variable beta gypsum content were prepared. The binders ensured compressive strength of at least 9 MPa at 28 days, structural stability over time, and appropriate distribution of titanium oxide, irrespective of the beta gypsum content in the mixture. Optimal water resistance and self-cleaning ability were achieved for 63–70% beta gypsum content, which triggered a small increase (~5%) in porosity. The results suggest the utilization of the developed binder as selfcleaning plaster on structures exposed to atmospheric pollutants.

Název v anglickém jazyce

Self-cleaning ability of gypsum-cement-pozzolan binders based on thermally processed red gypsum waste of titanium oxide manufacture

Popis výsledku anglicky

A recycling solution for landfilled red gypsum waste originating from titanium oxide manufacture (sulfate method), is proposed. The waste consisted mainly of gypsum, goethite, and free titanium oxide as indicated by thermal and x-ray diffraction analyses, and scanning electron microscopy. Photocatalytically active beta gypsum, with physical properties typical for building gypsum, was obtained by thermal treatment (140–190 ◦C) of the waste. On its basis, gypsum-cement-pozzolan binders of variable beta gypsum content were prepared. The binders ensured compressive strength of at least 9 MPa at 28 days, structural stability over time, and appropriate distribution of titanium oxide, irrespective of the beta gypsum content in the mixture. Optimal water resistance and self-cleaning ability were achieved for 63–70% beta gypsum content, which triggered a small increase (~5%) in porosity. The results suggest the utilization of the developed binder as selfcleaning plaster on structures exposed to atmospheric pollutants.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Building Engineering

ISSN

2352-7102

e-ISSN

2352-7102

Svazek periodika

87

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

109009

Kód UT WoS článku

001218913100001

EID výsledku v databázi Scopus

2-s2.0-85187209933