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Strength and leaching performance of in-situ stabilized/solidified contaminated site soils under different depths

Wang, Fei, Shen, Z. and Jin, Fei 2016. Strength and leaching performance of in-situ stabilized/solidified contaminated site soils under different depths. Journal of Southeast University (Natural Science Edition) 46 , pp. 105-110.

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Abstract

In-situ stabilized/solidified (S/S) technique was used to treat the heavy metal and organic contaminated site soils in the Castleford, Yorkshire site. Portland cement, fly ash, magnesia and modified clays, etc. were used. The unconfined compressive strength test as well as the BS EN12457 batch leaching test were conducted on the S/S contaminated soils at 1.5 years after treatment, to assess the influences of different depth on the strength and leaching performances of S/S contaminated soils. The results show that the strengths of all these treated mixes by different binders can meet their design values of the UK; depth is not as significant as other factors on the influence of S/S contaminated site soils' strength. Moreover, except part of Ni, the leaching concentrations of Cu, Zn and Pb are able to meet their drinking water standard. By comparison of the treatment effects of different binders, modified clays are found to be able to immobilize Ni efficiently, however, they are inefficient in immobilizing organic compounds.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Ministry of Education of China
ISSN: 1003-7985
Last Modified: 20 Jul 2020 09:53
URI: https://orca.cardiff.ac.uk/id/eprint/133485

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