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Comparison of properties of traditional and accelerated carbonated solidified/stabilized contaminated soils

Comparison of properties of traditional and accelerated carbonated solidified/stabilized contaminated soils

Liu, Jiangying, Xu, Dimin, Xiong, Lan, Hills, Colin, Carey, Paula and Gardner, Kevin (2008) Comparison of properties of traditional and accelerated carbonated solidified/stabilized contaminated soils. Journal of Environmental Sciences, 20 (5). pp. 593-598. ISSN 1001-0742 (doi:10.1016/S1001-0742(08)62099-9)

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Abstract

The investigation of the long-term performance of solidified/stabilized (S/S) contaminated soils was carried out in a trial site in southeast UK. The soils were exposed to the maximum natural weathering for four years and sampled at various depths in a controlled manner. The chemical properties (e.g., degree of carbonation (DOC), pH, electrical conductivity (EC)) and physical properties (e.g., moisture content (MC), liquid limit (LL), plastic limit (PL), plasticity index (PI)) of the samples untreated and treated with the traditional and accelerated carbonated S/S processes were analyzed. Their variations on the depths of the soils were also studied. The result showed that the broad geotechnical properties of the soils, manifested in their PIs, were related to the concentration of the water soluble ions and in particular the free calcium ions. The samples treated with the accelerated carbonation technology (ACT), and the untreated samples contained limited number of free calcium ions in solutions and consequently interacted with waters in a similar way. Compared with the traditional cement-based S/S technology, e.g., treatment with ordinary portland cement (OPC) or EnvirOceM, ACT caused the increase of the PI of the treated soil and made it more stable during long-term weathering. The PI values for the four soils ascended according to the order: the EnvirOceM soil, the OPC soil, the ACT soil, and the untreated soil while their pH and EC values descended according to the same order.

Item Type: Article
Uncontrolled Keywords: solidified/stabilized, accelerated carbonation, contaminated soil, electrical conductivity, liquid limit, plastic limit, plasticity index
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Faculty / Department / Research Group: Faculty of Engineering & Science > Department of Pharmaceutical, Chemical & Environmental Sciences
Related URLs:
Last Modified: 09 Dec 2016 11:34
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/2201

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