Leaching resistance of hazardous waste cement solidification after accelerated carbonation

Zha, Xiaoxiong and Wang, Haiyang and Xie, Peiyu and Wang, Chen and Dangla, Patrick and Ye, Jianqiao (2016) Leaching resistance of hazardous waste cement solidification after accelerated carbonation. Cement and Concrete Composites, 72. pp. 125-132. ISSN 0958-9465

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Abstract

When cement-based materials are carbonated, some of their physicochemical properties are changed, which includes reductions of porosity by 20% and pH from 12-13 to 8–9. These changes can enhance the retention ability of cementitious solids containing hazard waste. This research studied the effect of carbonation on the leaching resistance of hazardous waste cement solidification. The finite element software COMSOL Multiphysics was used to simulate the process of accelerated carbonation and the effect of carbonation on leaching. Laboratory tests were conducted to validate the numerical models. Parametric studies from the numerical simulations revealed that carbonation could significantly improve leaching retention capabilities of cementitious solids containing hazardous wastes.

Item Type:

Journal Article

Journal or Publication Title:

Cement and Concrete Composites

Additional Information:

This is the author’s version of a work that was accepted for publication in Cement and Concrete Composites. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Cement and Concrete Composites, 72, 2016 DOI: 10.1016/j.cemconcomp.2016.06.001

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2200/2215

Subjects:

?? hazardous waste cement solidificationaccelerated carbonationcomsol multiphysics simulationparticle leaching testleaching rate and cumulative leaching ratebuilding and constructionmaterials science(all) ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

79854

Deposited By:

ep_importer_pure

Deposited On:

06 Jun 2016 14:30

Refereed?:

Yes

Published?:

Published