Slag lime is a blend of 80–85 wt% slag, 15 wt% hydrated lime, Ca(OH)2 and 3–8 wt% gypsum CaSO4.2H2O, and is typically used for soil stabilisation in roading applications. The northern depocentre represents estuarine infill to the Yarra and Maribyrnong, a river system, whereas the southern depocentre appears to be an offshore bay facies. Western portal precinct, Arden station precinct, Tunnels precinct (CBD South Abstract A microstructural study of Coode Island Silt (CIS), a soft silty clay from the Melbourne area of Australia, stabilised with slag lime is reported. On 21 August 1991 at approximately 2.17 pm, an explosion occurred on Coode Island in Melbourne when a 600,000 litre chemical storage tank filled with acrylonitrile exploded and caught fire. The eastern approach slab of the WGB is sitting on Coode Island silt and is setting, therefore it needs to be jacked up. – Potential for vapours from volatile organic compounds in the groundwater • Conclusions: Coode Island Silt is particularly extensive, and in many places contains sufficient iron pyrites to produce an 'acid sulfate soil' when drained and exposed to oxidation. Coode Island Silt (Qc) Soft clayey sediments with shells and organic materials and lenses or thin layers of sandy material. Highest slag lime content produces the highest alkaline environment. Coode Island Silt (CIS) is one of the youngest formed sedimentary formations in the Melbourne geological region of the Yarra Delta. 13.5.2 Coode Island Silt/Fishermens Bend Silt (B Wells).....105 6 of 145. Coode Island Silt is a Quaternary age alluvial deposit of the Yarra River delta in Melbourne. The oldest Holocene unit is the Coode Island Silt that has two depocentres, each up to 20.0–25.0 m thick, separated by a NW–SE belt of older pre-Holocene units. Yarra associated with Coode Island Silt – Soil vapours found in shallow soils at Arden in the Fill – Soil vapours around the water table in the Coode Island Silt just south of the Yarra. The soil was a soft marine clay known as Coode Island Silt (CIS). Incorporation of Coastal Acid Sulfate Soils . Settlement characteristics of Coode Island Silt Sri T. Srithar. As discussed by J. L. Neilson, the Coode Island Silt unit is widespread throughout the lower Yarra Delta region, being present beneath much of South Melbourne, Port Melbourne and Footscray. Slag lime is a blend of 80–85 wt% slag, 15 wt% hydrated lime, Ca (OH)2 and 3–8 wt% gypsum CaSO4.2H 2O, and is typically used for soil stabilisation in roading applications. pp. As discussed by J. L. Neilson, the Coode Island Silt unit is widespread throughout the lower Yarra Delta region, being present beneath much of South Melbourne, Port Melbourne and Footscray. Slag lime is a blend of 80–85 wt% slag, 15 wt% hydrated lime, Ca(OH)2 and 3–8 wt% gypsum CaSO4.2H2O, and is typically used for soil stabilisation in roading applications. In fact, South Melbourne and the Yarra Delta is backfilled with marine silt. Site investigations indicate the presence of limited methane in shallow alluvial soils (Coode Island Silt) at the western portal and Arden station sites, with some methane likely to be present in the vicinity of the Yarra River (CBD South station to Domain station). •Initially designing a suitable foundation system to negate the 25m depth of Coode Island silt over a 10m depth of Moray Street gravels, and then coordinating the … –That led to the Exercise Labyrinth. The morphologies of several homogeneous mixtures of slag lime and CIS were studied by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD), which indicated the formation of the cementitious phases calcium carbonate, calcium silicate hydrate, calcium aluminium silicate hydrate, and calcium aluminium silicate carbonate. The eastern section of the West Gate Bridge in Melbourne is experiencing 'downward movement' due to being built on Coode Island silt, according to The Herald Sun. Coode Island silt) ROADWORKS – CONTAMINATED SOIL MA NAGEMENT PROCEDURE EDOCs #10319675 v 1 DOCUMENT REVISION . “We’ve got Coode Island Silt ranging from 20 kPa strength right through 100 MPa rock, and everything in between,” says Chris Boyd, Team Leader – Geotechnical. Because it is a highly compressible material, CIS imposes geotechnical constraints on the design and performance of infrastructure works. Highest alkaline environment promotes the formation of cementitious minerals. PDF 1Mb. https://doi.org/10.1016/j.clay.2018.02.045. Coode Island silt — the s oft clay-like soil underneath the 42-year-old bridge — slowly compacting is being blamed for the movement, which is affecting the bridge’s eastern approach. The Fishermans Bend Silt was followed by a period of lower sea level at which time the Mount Fraser lava flow reached the delta. These composites constitute a new class of materials with excellent potential for construction applications. She thinks environmental and community groups must be pragmatic about Coode Island. We use cookies to help provide and enhance our service and tailor content and ads. The deposit is normally consolidated and highly compressible, and with depths of up to 25 metres, significant settlements result from even modest loadings. Abstract A microstructural study of Coode Island Silt (CIS), a soft silty clay from the Melbourne area of Australia, stabilised with slag lime is reported. Zone 2: The inferred subsurface stratigraphy typically comprises a thin layer of uncontrolled fill overlying deep Coode Island Silt, over Fishermens Bend Silt, Moray Street Gravels then Melbourne Formation at about 40 to 60 mbgl. A microstructural study of Coode Island Silt (CIS), a soft silty clay from the Melbourne area of Australia, stabilised with slag lime is reported. specific geological formations, such as Coode Island Silt, Werribee Formation and Brighton Group, that may become oxidised during construction – with these formations most likely to be found at the western portal, eastern portal and Arden station sites and in sections of the tunnels between CBD South station and the eastern portal; The CIS is common to this area has an undrained shear strength of 15–80 kPa, depending on the depth. I am currently advising Moonee Valley on development of Ascot Chase site that is to be constructed on controlled deep fill placed under Level 1 supervision over compressible Coode Island Silt. You are currently offline. Organic rich and known to contain gas pockets within the unit. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Coode Island Silt is a Quaternary age alluvial deposit of the Yarra River delta in Melbourne. The Port of Los Angeles (POLA) is a major seaport serving as a "Gateway to the Pacific" both to the Southern California region and nation. A microstructural study of Coode Island Silt (CIS), a soft silty clay from the Melbourne area of Australia, stabilised withslag lime is reported. The Port Melbourne Sands are present throughout Fishermens Bend, Port Melbourne and parts of Middle Park. –Following various discussions it was decided to organise and test a multi-agency response. Coode Island silt — the s oft clay-like soil underneath the 42-year-old bridge — slowly compacting is being blamed for the movement, which is affecting the bridge’s eastern approach. The progress of the CIS-slag lime reactions was also investigated by pH measurements. Abdelmalek Bouazza, Pek Soon Kwan and Gary Chapman. Coode Island Silt (Qc) Soft clayey sediments with shells and organic materials and lenses or thin layers of sandy material. The most effective pozzolanic reactions occurred in a composite containing 12.5 wt% slag lime with CIS and contained the cement mineral ettringite, contributing to its high strength. It is a highly compressible and only slightly overconsolidated deposit, which exhibits significant primary consolidation and creep settlements. Elena Galtos says the unions should press for reduced use of chemicals, but should also be alert to attempts to use cleaner production as a pretext to shed jobs. Slag lime is a blend of 80–85 wt% slag, 15 wt% hydrated lime, Ca(OH)2 and 3–8 wt% gypsum CaSO4.2H2O, and is typically used for soil stabilisation in roading applications. The route also ensured that the Yarra waters would discharge into the river mouth, scouring the bay and reducing silt deposition. Microstructural study of the stabilised Coode Island Silt (CIS) is presented. Slag lime is a blend of 80–85 wt% slag, 15 wt% hydrated lime, Ca(OH)2 and 3–8 wt% gypsum CaSO4.2H2O, and is typically used for soil stabilisation in roading applications. … Port Melbourne Sand (Q p ) – loose to medium dense clean sands of marine origin. The location of works is in Port Melbourne where the WGB meets the … In general pile foundations will likely be required for most structures. soils, i.e. Aquitard, porous medium, due to presence of sand layers and lenses, horizontal hydraulic conductivity (Kh) greater than vertical (Kv). In Situ Test Protocols for Quality Assessments of Deep Mixing Columns. An improved approach to site characterisation combining geophysical and geotechnical data The geology of this part of the Yarra Delta zone is particularly challenging as the very weak Coode Island Silt horizon extends to 25-30m depth and the Melbourne Formation bedrock is not encountered until 40-45m. But what really keeps geotechnical engineers on their toes is the variability in strength they encounter. The northern depocentre represents estuarine infill to the Yarra and Maribyrnong, a river system, whereas the southern depocentre appears to be an offshore bay facies. The route also ensured that the Yarra waters would discharge into the river mouth, scouring the bay and reducing silt deposition. Some features of the site may not work correctly. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. This led to some piles being constructed at depths of 51m – the deepest CFA piles constructed in Australia at that time. The meander was known as Fishermens Bend or Humbug Reach (1887). Copyright © 2021 Elsevier B.V. or its licensors or contributors. The former course of the Yarra River was slowly filled in over the years, along with the associated swamps, and by the mid-twentieth century, Coode Island was no … The following table outlines the minor revisions made to this document: Date Nature of Revision Editor . Structural behaviour of an Australian silty clay (Coode Island silt) stabilised by treatment with slag lime. The Consequences Strength Properties of Cement Treated Coode Island Silt by the Soil Mixing Method. SEM, XRF and XRD tests are employed in this study. It’s understood works were recommended in a recent assessment with the section’s concrete slab and beams to be raised. The project also involves asphalt works and minor barrier rectification works. An impressive shoring arrangement has been used in a basement retention system on a difficult site comprising sand, Moray Street Gravels & Coode Island Silt located less than 100 m from the shore of Port Phillip Bay. Coode Island Silt (CIS) is one of the youngest formed sedimentary formations in the Melbourne geological region of the Yarra Delta. The loop of the Yarra River at Fishermens Bend proved yet another navigational challenge as ships attempted to reach the city of Melbourne. –The Coode Island incident highlighted the need for a well co-ordinated multi-agency response to major incidents. Abstract A microstructural study of Coode Island Silt (CIS), a soft silty clay from the Melbourne area of Australia, stabilised with slag lime is reported. PDF 477kB. Aquitard, porous medium, due to presence of sand layers and lenses, horizontal hydraulic conductivity (Kh) greater than vertical (Kv). Coode island silt is a firm to stiff silty clay which covers a significant area of the Yarra delta near Melbourne. Organic rich and known to contain gas pockets within the unit. Slag lime is a blend of 80–85 wt% slag, 15 wt% hydrated lime, Ca(OH)2 and 3–8 wt% gypsum CaSO4.2H2O, and is typically used for soil stabilisation in roading applications. Western portal precinct, Arden station precinct, Tunnels precinct (CBD South The Trades Hall wants chemical facilities moved from Coode Island. Coode Island silt is a soft clay-like soil that has allegedly compressed over time under the pressure of the 42-year-old bridge. March 2015 . 1421 - 1428 . Port Melbourne Sand (Qp) – loose to medium dense clean sands of marine origin. The route also ensured that the Yarra waters would discharge into the river mouth, scouring the bay and reducing silt deposition. A microstructural study of Coode Island Silt (CIS), a soft silty clay from the Melbourne area of Australia, stabilised withslag lime is reported. References Gray, Marilyn, and J. Knight, et al, Flora of Melbourne, Society for Growing … Coode Island Silt (Qc) – soft to firm highly compressible clay or silty clay with occasional sand lenses. The meander was known as Fishermens Bend or Humbug Reach (1887). © 2018 Elsevier B.V. All rights reserved. The oldest Holocene unit is the Coode Island Silt that has two depocentres, each up to 20.0–25.0 m thick, separated by a NW–SE belt of older pre-Holocene units. Different combinations of FA and S with six combinations of sodium and potassium based liquid alkaline activators (L) were added to the soil to study the effects on its engineering and chemical properties. Coode Island Silt (CIS) is one of the youngest formed sedimentary formations in the Melbourne geological region of the Yarra Delta. Robert White. Slag lime is a blend of 80–85 wt% slag, 15 wt% hydrated lime, Ca(OH)2 and 3–8 wt% gypsum CaSO4.2H2O, and is typically used for soil stabilisation in roading applications. The Port Melbourne Sands are present throughout Fishermens Bend, Port Melbourne and parts of Middle Park. Slag lime was found to very actively promote pozzolanic reactions with CIS, shown by SEM to form crystalline reticular calcium silicate hydrate and other cementitious products. This was followed by further marine deposition during a period of higher sea level, giving rise to the Coode Island Silt, a richly fossiliferous silt and silty clay. A microstructural study of Coode Island Silt (CIS), a soft silty clay from the Melbourne area of Australia, stabilised with slag lime is reported. The morphologies of several homogeneous mixtures of slag lime and CIS were studied by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD), which indicated the…, Effect of Cutter Soil Mixing (CSM) method and curing pressures on the tensile strength of a treated soft clay, Long-term dynamic behaviour of Coode Island Silt (CIS) containing different sand content, Effect of Sand Content on the Liquefaction Potential and Post-Earthquake Behaviour of Coode Island Silt, Microstructure of cement-treated Singapore marine clay, Sulphate attack and ettringite formation in the lime and cement stabilized marine clays, Effects of partial substitution of lime with ground granulated blast furnace slag (GGBS) on the strength properties of lime-stabilised sulphate-bearing clay soils, PHYSICOCHEMICAL AND ENGINEERING BEHAVIOR OF CEMENT TREATED CLAYS, Multi-scale analysis and time evolution of pozzolanic activity of lime treated clays, Lime consumption of different clayey soils, Strength Properties of Cement Treated Coode Island Silt by the Soil Mixing Method, Addressing Sulfate-Induced Heave in Lime Treated Soils, TREATMENT OF SILT USING LIME AND PFA TO FORM EMBANKMENT FILL FOR THE NEW A13, By clicking accept or continuing to use the site, you agree to the terms outlined in our. Lime optimisation in lime-slag treated soft Coode Island Silt in Melbourne B. Stanley, G. J. Singh, A. Haque, P. G. Ranjith and A. Bouazza. 5. •Initially designing a suitable foundation system to negate the 25m depth of Coode Island silt over a 10m depth of Moray Street gravels, and then coordinating the … producing soft Coode Island Silt by including it in the building platform over highly compressible Coode Island Silt. By continuing you agree to the use of cookies. This area is characterized by highly compressible soft marine soil with a high water content, and is locally known as Coode Island Silt (CIS). Slag lime is found to very actively promote pozzolanic reactions with the CIS. Coode Island Silt (Qc) – soft to firm highly compressible clay or silty clay with occasional sand lenses. Sir John Coode’s harbour proposal included the entire distance from the mouth of the Yarra River, upstream to Princes Bridge.. The meander was known as Fishermens Bend or Humbug Reach (1887). 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