Strength Comparison of Cement Solidified/Stabilized Soils Contaminated by Lead and Copper

Chen, L., Liu, S.-Y., Du, Y.-J. and Jin, F. (2012) Strength Comparison of Cement Solidified/Stabilized Soils Contaminated by Lead and Copper. In: GeoShanghai International Conference 2010, Shanghai, China, 3-5 June 2010, pp. 103-110. (doi:10.1061/41105(378)15)

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Cement can be used as a binder for contaminated land remediation by reducing the leachability of contaminants. The contaminated soils can achieve a higher strength after cement solidification/stabilization process. However, contaminants in soils may interfere with the process of cement hydration, and lead to a more complicated strength development than conventional cemented soils. For soils contaminated by different types of heavy metals, the cement stabilized products may have different strength properties since heavy metals in the soils would influence the extent of chemical fixation among cement, soil, and contaminants mixtures. This paper presents an experimental study on the unconfined compressive strength of cement stabilized/solidified soils contaminated by lead, copper, and lead-copper mixture. The control samples (cement treated soils without any heavy metals) are also prepared for comparison purpose. The test results show that the presence of heavy metals in soils interferes with the cement hydration process, which is directly reflected by the variation in the strength development of samples. It is found that the types of heavy metal, the metal concentration, and the cement content are main factors which affect the cement hydration and strength.

Item Type:Conference Proceedings
Additional Information:Geotechnical Special Publication.
Glasgow Author(s) Enlighten ID:Jin, Dr Fei
Authors: Chen, L., Liu, S.-Y., Du, Y.-J., and Jin, F.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment

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