CUED Publications database

The performance of blended conventional and novel binders in the in-situ stabilisation/solidification of a contaminated site soil

Wang, F and Wang, H and Jin, F and Al-Tabbaa, A (2015) The performance of blended conventional and novel binders in the in-situ stabilisation/solidification of a contaminated site soil. Journal of Hazardous Materials, 285. pp. 46-52. ISSN 0304-3894

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Abstract

© 2014 Elsevier B.V. This paper presents an investigation of the effects of novel binders and pH values on the effectiveness of the in-situ stabilisation/solidification technique in treating heavy metals and organic contaminated soils after 1.5-year treatment. To evaluate the performance of different binders, made ground soils of SMiRT site, upto 5. m depth, were stabilised/solidified with the triple auger system and cores were taken for laboratory testing after treatment. Twenty four different binders were used including Portland cement (PC), ground granulated blastfurnace slag (GGBS), pulverised fuel ash (PFA), MgO and zeolite. Unconfined compressive strength (UCS), leachate pH and the leachability of heavy metals and total organics were applied to study the behaviours of binders in treating site soils. Under various contaminant level and binder level, the results show that UCS values were 22-3476. kPa, the leachability of the total organics was in the range of 22-241. mg/l and the heavy metals was in the range of 0.002-0.225. mg/l. In addition, the combination of GGBS and MgO at a ratio of 9:1 shows better immobilisation efficiency in treating heavy metals and organic contaminated soils after 1.5-year treatment, and the binding mechanisms under different binders were also discussed in this paper.

Item Type: Article
Uncontrolled Keywords: Field trials Laboratory testing Novel binders Soil stabilisation Arsenic Compressive Strength Construction Materials Environmental Restoration and Remediation Incineration Industrial Waste Magnesium Oxide Metals, Heavy Organic Chemicals Soil Pollutants Zeolites
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:41
Last Modified: 22 Aug 2019 01:16
DOI: 10.1016/j.jhazmat.2014.11.002