Sustainable Utilization of Modified Electrolytic Manganese Residue as a Cement Retarder: Workability, Mechanical Properties, Hydration Mechanisms, Leaching Toxicity, and Environmental Benefits
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00383400" target="_blank" >RIV/68407700:21110/25:00383400 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3390/buildings15101586" target="_blank" >https://doi.org/10.3390/buildings15101586</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/buildings15101586" target="_blank" >10.3390/buildings15101586</a>
Alternative languages
Result language
angličtina
Original language name
Sustainable Utilization of Modified Electrolytic Manganese Residue as a Cement Retarder: Workability, Mechanical Properties, Hydration Mechanisms, Leaching Toxicity, and Environmental Benefits
Original language description
This study aims to enhance the sustainable utilization of electrolytic manganese residue (EMR), an industrial solid waste rich in sulfates and pollutants, by modifying it with appropriate proportions of granulated blast furnace slag (GBFS) and carbide slag (CS) and evaluating its potential as a cement retarder. The influence of both the GBFS/CS ratio and the dosage of modified EMR on the performance of cement mortar was systematically investigated, focusing on workability, mechanical properties, hydration behavior, leaching toxicity, and carbon emissions. Results showed that GBFS and CS significantly reduced pollutant concentrations in EMR while improving gypsum crystallinity. Modified EMR exhibited retarding properties, extending the initial and final setting times of cement mortar from 98 min and 226 min to 169 min and 298 min. With an 8 wt.% dosage, the 28-day compressive strength reached 58.76 MPa, a 1.3-fold increase compared to cement mortar (45.21 MPa). The content of reactive SiO2, Al2O3, Ca(OH)2, and CaSO4.2H2O promoted secondary hydration of cement and generated significant ettringite (AFt) and calcium silicate hydrate (C-S-H) gels, forming a dense microstructure. Pollutants in the modified EMR-cement mortar were reduced through precipitation, substitution, and encapsulation, meeting leaching toxicity standards. This study highlights the feasibility and environmental benefits of employing modified EMR as a cement retarder, demonstrating its potential in sustainable building materials.
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
20102 - Construction engineering, Municipal and structural engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
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
Buildings
ISSN
2075-5309
e-ISSN
2075-5309
Volume of the periodical
15
Issue of the periodical within the volume
10
Country of publishing house
CH - SWITZERLAND
Number of pages
26
Pages from-to
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UT code for WoS article
001497488900001
EID of the result in the Scopus database
2-s2.0-105006766551