Characterization of geopolymers prepared using powdered brick

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F75081431%3A_____%2F19%3A00001667" target="_blank" >RIV/75081431:_____/19:00001667 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21110/19:00336457 RIV/00216305:26110/19:PU134045

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2238785419310452?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2238785419310452?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2019.10.019" target="_blank" >10.1016/j.jmrt.2019.10.019</a>

Result language

angličtina

Original language name

Characterization of geopolymers prepared using powdered brick

Original language description

Geopolymerization of waste products can contribute to the solution of current environmental issues related to depletion of natural resources. In this paper, several geopolymer mixes are prepared using waste brick in powdered form, while different alkaline activators and curing conditions are applied. Experimental results show that the reaction rate at early age decreases with the increasing silicate modulus as well as with the rise of curing temperature; the reaction is though significantly slower than, e.g., for metakaolin-based geopolymers because of the low content of amorphous phase in the brick. The most compact microstructure is observed for geopolymers with highest reaction rate at early age; with increasing silicate modulus of the activator and decreasing curing temperature the compactness gradually decreases and the specific pore volume increases. Thermal analysis shows a decreasing weight loss with increasing silicate modulus for all temperatures, while dehydration of N-A-S -H and CASH gels are identified as the most important factors. Dehydroxylation of muscovite is found for the mixtures cured at temperatures up to 60 degrees C only, and decomposition of calcium carbonate just for 20 degrees C curing. Most crystalline phases detected by X-ray diffraction analysis in designed geopolymers are identical to those found in the raw precursor, which indicates only a partial geopolymerization and presence of a significant amount of unreacted particles. For geopolymers cured at 60 degrees C and 80 degrees C, formation of zeolitic phases is observed. While sodalite and chabazite are found only in mixtures with higher reaction rate, gismondine appears in geopolymers with higher silicate modulus.

Czech name

—

Czech description

—

Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/GA19-01982S" target="_blank" >GA19-01982S: Alkali activated aluminosilicate composites based on ceramic precursors</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2019

Confidentiality

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

Name of the periodical

Journal of Materials Research and Technology

ISSN

2238-7854

e-ISSN

—

Volume of the periodical

8

Issue of the periodical within the volume

6

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

6253-6261

UT code for WoS article

000501576400115

EID of the result in the Scopus database

2-s2.0-85077121076