Investigation of environmentally friendly gypsum based composites with improved water resistance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00359183" target="_blank" >RIV/68407700:21110/22:00359183 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jclepro.2022.133278" target="_blank" >https://doi.org/10.1016/j.jclepro.2022.133278</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jclepro.2022.133278" target="_blank" >10.1016/j.jclepro.2022.133278</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigation of environmentally friendly gypsum based composites with improved water resistance

Popis výsledku v původním jazyce

The water resistance of gypsum based composites, prepared from composed binder and silica sand was investigated. The composed binder contained hemihydrate gypsum, lime hydrate and several supplementary cementitious materials (SCM). Silica fume, granulated blast slag and waste ceramic dust were used as SCM in order to compare materials of various origins with different pozzolan activity. Hydrated lime served as an activator of pozzolanic reaction. Gypsum mortar, containing only calcined gypsum and sand was prepared as a reference material. Phase composition, microstructure, mechanical properties and water transport parameters were studied. While the strength of gypsum mortar stored in the water decreased by 90% at the age of one year, the strength of all materials with composed binder increased. The highest strength was achieved by the composite with silica fume, whose compressive strength increased more than three times. The C–S–H phases were found in all materials with SCM and they have finer porous structure than gypsum mortar. Material with silica fume achieved the best combined environmental and functional efficiency. Material with ceramic dust was deeply studied for the first time. This material is most promising because of very good environmental criteria and its price was lowest of all tested materials. The water resistance of gypsum based composites was significantly improved by the addition of SCM.

Název v anglickém jazyce

Investigation of environmentally friendly gypsum based composites with improved water resistance

Popis výsledku anglicky

The water resistance of gypsum based composites, prepared from composed binder and silica sand was investigated. The composed binder contained hemihydrate gypsum, lime hydrate and several supplementary cementitious materials (SCM). Silica fume, granulated blast slag and waste ceramic dust were used as SCM in order to compare materials of various origins with different pozzolan activity. Hydrated lime served as an activator of pozzolanic reaction. Gypsum mortar, containing only calcined gypsum and sand was prepared as a reference material. Phase composition, microstructure, mechanical properties and water transport parameters were studied. While the strength of gypsum mortar stored in the water decreased by 90% at the age of one year, the strength of all materials with composed binder increased. The highest strength was achieved by the composite with silica fume, whose compressive strength increased more than three times. The C–S–H phases were found in all materials with SCM and they have finer porous structure than gypsum mortar. Material with silica fume achieved the best combined environmental and functional efficiency. Material with ceramic dust was deeply studied for the first time. This material is most promising because of very good environmental criteria and its price was lowest of all tested materials. The water resistance of gypsum based composites was significantly improved by the addition of SCM.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA19-08605S" target="_blank" >GA19-08605S: Vliv plniv na strukturu a vlastnosti síranovápenatých kompozitů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of Cleaner Production

ISSN

0959-6526

e-ISSN

1879-1786

Svazek periodika

370

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

000848639200004

EID výsledku v databázi Scopus

2-s2.0-85136332052