Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions

Oproiu, Carmen-Lidia; Parvan, Marius-George; Voicu, Georgeta; Badanoiu, Alina-Ioana; Trusca, Roxana

Carmen-Lidia Oproiu, Marius-George Parvan, Georgeta Voicu, Alina-Ioana Badanoiu, Roxana Trusca

Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions

Abstract:

This research work assesses the influence of a chromium-rich waste (from potassium dichromate manufacture) on the hydration and hardening processes of two types of Portland cements with limestone filler and slag additions. Therefore, mixtures of Portland cement and chromium-rich waste, corresponding to 0.5% wt. and 1% wt. Cr, were prepared and tested. The analyses performed on cement pastes with chromium waste content, showed that chromium immobilization is mainly due to the formation of Ca6Al2Cr3O18·32H2O (CrEt); this compound results by the substitution of [SO4]2- groups from ettringite lattice of with [CrO4]2-. CrEt crystals growth on the surface of clinker particles forms a diffusion barrier which explains longer setting times for cements with chromium content. The increase of chromium content in the studied systems decreases the compressive strength values but these remain above the lower limits imposed for this type of materials. The chromium content in leachates prepared according to the method described in SR EN 12457-2, was well below the legal limit of 70 mg/Kg established by Romanian legislation. A better chromium immobilisation was achieved in the cement with slag content, in good correlation with the nature and amount of formed hydrates.

Keywords:
Chromium rich industrial waste; Hydraulic binders; Hardening and immobilisation processes

Issue: 2020, Volume 71, Issue 2

Pages: 252-261

Publication date: 2020/3/3

https://doi.org/10.37358/RC.20.2.7923

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
OPROIU, C., PARVAN, M., VOICU, G., BADANOIU, A., TRUSCA, R., Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions, Rev. Chim., 71(2), 2020, 252-261.

Vancouver
Oproiu C, Parvan M, Voicu G, Badanoiu A, Trusca R. Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions. Rev. Chim.[internet]. 2020 Feb;71(2):252-261. Available from: https://doi.org/10.37358/RC.20.2.7923

APA 6th edition
Oproiu, C., Parvan, M., Voicu, G., Badanoiu, A. & Trusca, R. (2020). Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions. Revista de Chimie, 71(2), 252-261. https://doi.org/10.37358/RC.20.2.7923

Harvard
Oproiu, C., Parvan, M., Voicu, G., Badanoiu, A., Trusca, R. (2020). 'Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions', Revista de Chimie, 71(2), pp. 252-261. https://doi.org/10.37358/RC.20.2.7923

IEEE
C. Oproiu, M. Parvan, G. Voicu, A. Badanoiu, R. Trusca, "Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions". Revista de Chimie, vol. 71, no. 2, pp. 252-261, 2020. [online]. https://doi.org/10.37358/RC.20.2.7923

Text
Carmen-Lidia Oproiu, Marius-George Parvan, Georgeta Voicu, Alina-Ioana Badanoiu, Roxana Trusca,
Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions,
Revista de Chimie,
Volume 71, Issue 2,
2020,
Pages 252-261,
ISSN 2668-8212,
https://doi.org/10.37358/RC.20.2.7923.
(https://revistadechimie.ro/Articles.asp?ID=7923)
Keywords: Chromium rich industrial waste; Hydraulic binders; Hardening and immobilisation processes

RIS
TY - JOUR
T1 - Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions
A1 - Oproiu, Carmen-Lidia
A2 - Parvan, Marius-George
A3 - Voicu, Georgeta
A4 - Badanoiu, Alina-Ioana
A5 - Trusca, Roxana
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2020
VL - 71
IS - 2
SP - 252
EP - 261
UR - https://doi.org/10.37358/RC.20.2.7923
KW - Chromium rich industrial waste; Hydraulic binders; Hardening and immobilisation processes
ER -

BibTex
@article{RevCh2020P252,
author = {Oproiu Carmen-Lidia and Parvan Marius-George and Voicu Georgeta and Badanoiu Alina-Ioana and Trusca Roxana},
title = {Influence of a Chromium-rich Industrial Waste on the Hydration and Hardening Processes of Portland Cements with Slag and Limestone Additions},
journal = {Revista de Chimie},
volume = {71},
number = {2},
pages = {252-261},
year = {2020},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.20.2.7923},
url = {https://revistadechimie.ro/Articles.asp?ID=7923}
}

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