Microstructure and ecotoxicological response of Portland cement composites incorporating coal fly ash
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00386366" target="_blank" >RIV/68407700:21110/25:00386366 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/25:43932737 RIV/60461373:22330/25:43932737
Result on the web
<a href="https://doi.org/10.1016/j.rineng.2025.108364" target="_blank" >https://doi.org/10.1016/j.rineng.2025.108364</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.rineng.2025.108364" target="_blank" >10.1016/j.rineng.2025.108364</a>
Alternative languages
Result language
angličtina
Original language name
Microstructure and ecotoxicological response of Portland cement composites incorporating coal fly ash
Original language description
Utilization of coal fly ash (FA) as a Portland cement (PC) admixture offers a promising yet underexplored approach to reduce PC’s environmental impact and enable sustainable reuse of industrial by-products. This study addresses the gap concerning the technical performance and environmental safety of FA-containing binders (PC-FA). FA characterization via XRD, XRF, EDS, and SEM revealed dominant crystalline phases (quartz, mullite, magnetite, rutile) and a heterogeneous microstructure. Incorporating 10 wt.% and 20 wt.% FA into PC produced denser matrices, refined microstructures, and enhanced pozzolanic activity without compromising mortar integrity (compactness, absence of microcracks, voids and segregation). Bioassays at environmentally relevant concentrations (1 g/L, 0.1 g/L, 0.01 g/L) were carried out on prokaryotic (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa) and eukaryotic (Desmodesmus subspicatus, Artemia salina, Sinapis alba) models. No significant inhibition of bacterial growth was observed. Biofilm formation on all PC surfaces was significantly lower than on polystyrene (reference), with strain-specific effects: FA increased S. aureus biofilm formation, while E. coli and P. aeruginosa formed less biofilm on FA-doped samples than on PC-REF by up to 2 log10(CFU/cm2). FTIR of PC composites incubated with E. coli indicated reduced portlandite and calcite contents, suggesting a lower internal pH and possible chemical disruption under bacteria-favouring conditions. Low toxicity (<10 %) of FA or PC-FA toward D. subspicatus and A. salina was determined. Low phytotoxicity (~70 % germination index) was observed in S. alba at high exposure (1 g/L) for all PC types, without FA-related effect. These results support PC-FA´s´ potential in sustainable construction applications.
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
20501 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Results in Engineering
ISSN
2590-1230
e-ISSN
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Volume of the periodical
28
Issue of the periodical within the volume
108364
Country of publishing house
US - UNITED STATES
Number of pages
16
Pages from-to
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UT code for WoS article
001633402000004
EID of the result in the Scopus database
2-s2.0-105023587363