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Full-Text Articles in Engineering
Installation Of A Lime Injection Barrier For The Remediation Of Acid Sulphate Soil Problems, Buddhima Indraratna, A. N. Golab, Laura J. Banasiak
Installation Of A Lime Injection Barrier For The Remediation Of Acid Sulphate Soil Problems, Buddhima Indraratna, A. N. Golab, Laura J. Banasiak
Faculty of Engineering - Papers (Archive)
Oxidation of naturally occurring pyrite (FeS2) in certain low-lying clayey soils generates sulphuric acid, hence the term acid sulphate soils. A horizontal alkaline barrier was installed by radial grouting, for the purpose of remediating leachate from acid sulphate soils and preventing further oxidation. The current research relates to a large-scale field trial of this technique and the effect on the groundwater composition. In coastal Australia, a pyritic layer commonly exists in the soil at shallow depth that is at risk of oxidation, hence the main objective was to inject the barrier above the pyritic layer to (a) stop infiltration of …
Selection Of Potential Reactive Materials For A Permeable Reactive Barrier For Remediating Acidic Groundwater In Acid Sulphate Soil Terrains, A. N. Golab, M. A. Peterson, Buddhima Indraratna
Selection Of Potential Reactive Materials For A Permeable Reactive Barrier For Remediating Acidic Groundwater In Acid Sulphate Soil Terrains, A. N. Golab, M. A. Peterson, Buddhima Indraratna
Faculty of Engineering - Papers (Archive)
A permeable reactive barrier is being designed to remediate leachate from acid sulphate soils. The current research relates to testing of alkaline materials for use in the barrier, with an emphasis on waste materials. Thirteen alkaline materials including recycled concrete, limestone, calcite-bearing zeolitic breccia, blast furnace slag, lime and fly ash were tested. The batch tests involved several phases, such as leaching in deionised water to characterise the soluble components of the materials and the pH that each material could achieve. Another phase involved testing with acidic water (pH 3) to determine the acid leachable components of the materials and …