Recycling of fly ash and carbide slag in low-carbon cement composites by pre-depolymerization and pre-dissolution treatment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F24%3A10256345" target="_blank" >RIV/61989100:27360/24:10256345 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S235271022402970X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S235271022402970X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jobe.2024.111402" target="_blank" >10.1016/j.jobe.2024.111402</a>
Alternative languages
Result language
angličtina
Original language name
Recycling of fly ash and carbide slag in low-carbon cement composites by pre-depolymerization and pre-dissolution treatment
Original language description
The application of high-volume fly ash cement (HVFC) composites is significant for the development of low-carbon building materials, but restricted by poor early and late mechanical properties due to the difficulty in depolymerization of the dense Si-Al network structure on the fly ash (FA) surface without high alkalinity. In this study, aiming to enhance the HVFC performances, a strategy for improving HVFC composites by pre-polymerized FA and pre-dissolved carbide slag waste (CSW) in wet-milling was developed. The mechanochemical process of wet-milling destroyed the Si-Al structure of FA and promoted the leaching of Ca2+ and OH- from CSW, which realizes the pre-polymerization of FA and the pre-dissolution of CSW, producing new phases such as Ca-Al-Cl LDHs and AFt, respectively. The mechanochemical process reduces the reaction threshold between FA and CSW, enabling independent hydration reactions between them. Furthermore, wet milling improves the degree of dissolution of the aluminum phase in FA and OH- in CSW and promotes the Al embedding into the C-S-H gel structure. The early and late compressive strengths of HVFC were greatly improved, with 139 % and 60 % increases in 3 days and 56 days. This work provides feasible strategies to improve the mechanical property limitations of HVFC.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20100 - Civil engineering
Result continuities
Project
<a href="/en/project/EF17_048%2F0007373" target="_blank" >EF17_048/0007373: Damage Prediction of Structural Materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Building Engineering
ISSN
2352-7102
e-ISSN
2352-7102
Volume of the periodical
98
Issue of the periodical within the volume
111402
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
18
Pages from-to
1-18
UT code for WoS article
001368015500001
EID of the result in the Scopus database
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