Abstract
Both high-calcium fly ash and soda residue are the industrial by-products generated during the combustion of coal for energy production and sodium carbonate production, respectively. Previous studies suggested that both high-calcium fly ash and soda residue can be used to treat heavy metal contaminated soils. Therefore, a series of laboratory experiments were performed to investigate the strength and leaching properties of Pb-contaminated soils solidified/stabilized by high calcium fly ash and soda residue. The results presented that adding high-calcium fly ash to the contaminated soils can significantly improve the soil strength and reduce the Pb2+ amount released out. The specimens treated with soda residue got a higher strength, but a relatively lower chemical stability than that of fly ash. SEM results confirmed that Ca(OH)2 and CSH was the main products that improved the engineering properties of the stabilized contaminated soils.
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Acknowledgment
This research is financially supported by the National Natural Science Foundation of China (grant nos. 41672306, 41372281, 41172273, and 41572282).
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Liu, J., Zha, F., Xu, L., Deng, Y., Chu, C. (2018). Engineering Properties of Heavy Metal Contaminated Soil Solidified/Stabilized with High Calcium Fly Ash and Soda Residue. In: Farid, A., Chen, H. (eds) Proceedings of GeoShanghai 2018 International Conference: Geoenvironment and Geohazard. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0128-5_49
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DOI: https://doi.org/10.1007/978-981-13-0128-5_49
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