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Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment

The effect of hydrothermal curing regimes on the hydration characteristics of slag cement containing different ratios of cement kiln dust has been studied. The samples for this study were combination of slag cement and cement kiln dust (5%-25%) without and with immobilization of 5% Cr (VI) by mass....

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Main Authors: Shatat, M. R., Ali, Gomaa A. M., Tantawy, M. A.
Format: Article
Language:English
Published: Springer 2015
Subjects:
QD Chemistry
Online Access:http://umpir.ump.edu.my/id/eprint/14165/1/fist-2015-gomaa-Hydration%20Characteristics%20and%20Immobilization.pdf
http://umpir.ump.edu.my/id/eprint/14165/
http://dx.doi.org/10.1007/s11595-015-1266-7
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spelling my.ump.umpir.141652016-08-25T04:06:43Z http://umpir.ump.edu.my/id/eprint/14165/ Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment Shatat, M. R. Ali, Gomaa A. M. Tantawy, M. A. QD Chemistry The effect of hydrothermal curing regimes on the hydration characteristics of slag cement containing different ratios of cement kiln dust has been studied. The samples for this study were combination of slag cement and cement kiln dust (5%-25%) without and with immobilization of 5% Cr (VI) by mass. Pastes were hydrothermally treated at 180 °C for different periods (2-24 h) in well closed stainless steel capsule. The hydration characteristics of these pastes were studied by measuring the compressive strength, bulk density, total porosity and combined water content. The findings were further supported by XRD and SEM analysis. The results indicated that the hydration characteristics of slag cement paste containing cement kiln dust 10% by mass were enhanced, especially at later ages (24 h) of hydration. That is due to the hydrothermal curing regimes of immobilized pastes accelerating hydration reactions and precipitation of CaCrO4, indicating that Cr (VI) can be solidified in the cement paste. This precipitation leads to pore formation in hydrated slag cement pastes. Springer 2015 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/14165/1/fist-2015-gomaa-Hydration%20Characteristics%20and%20Immobilization.pdf Shatat, M. R. and Ali, Gomaa A. M. and Tantawy, M. A. (2015) Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment. Journal of Wuhan University of Technology-Mater. Sci. Ed., 30 (5). pp. 1013-1019. ISSN 1000-2413 (Print); 1993-0437 (Online) http://dx.doi.org/10.1007/s11595-015-1266-7 DOI: 10.1007/s11595-015-1266-7
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic QD Chemistry
spellingShingle QD Chemistry
Shatat, M. R.
Ali, Gomaa A. M.
Tantawy, M. A.
Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
description The effect of hydrothermal curing regimes on the hydration characteristics of slag cement containing different ratios of cement kiln dust has been studied. The samples for this study were combination of slag cement and cement kiln dust (5%-25%) without and with immobilization of 5% Cr (VI) by mass. Pastes were hydrothermally treated at 180 °C for different periods (2-24 h) in well closed stainless steel capsule. The hydration characteristics of these pastes were studied by measuring the compressive strength, bulk density, total porosity and combined water content. The findings were further supported by XRD and SEM analysis. The results indicated that the hydration characteristics of slag cement paste containing cement kiln dust 10% by mass were enhanced, especially at later ages (24 h) of hydration. That is due to the hydrothermal curing regimes of immobilized pastes accelerating hydration reactions and precipitation of CaCrO4, indicating that Cr (VI) can be solidified in the cement paste. This precipitation leads to pore formation in hydrated slag cement pastes.
format Article
author Shatat, M. R.
Ali, Gomaa A. M.
Tantawy, M. A.
author_facet Shatat, M. R.
Ali, Gomaa A. M.
Tantawy, M. A.
author_sort Shatat, M. R.
title Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_short Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_full Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_fullStr Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_full_unstemmed Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_sort hydration characteristics and immobilization of cr (vi) in slag cement-ckd pastes under hydrothermal treatment
publisher Springer
publishDate 2015
url http://umpir.ump.edu.my/id/eprint/14165/1/fist-2015-gomaa-Hydration%20Characteristics%20and%20Immobilization.pdf
http://umpir.ump.edu.my/id/eprint/14165/
http://dx.doi.org/10.1007/s11595-015-1266-7
_version_ 1643667358364991488
score 13.211869

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