Soil stabilisation with novel binders

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• Jega Jegandan
• Friday 29 May 2009, 16:30-17:30
• Engineering Department - LR3A.

If you have a question about this talk, please contact Zelda Stuck.

Soil stabilisation is an emerging technology in geotechnical and geo-environmental industry. With wide range of applications, this technology is becoming one of the most common methods of enhancing or altering engineering properties of problematic soils. The fundamental principle of the technology is the application of chemical binding agents to the soil and mix them mechanically to enhance engineering performance of the original soil.

While Portland cement and lime are used as conventional binders, there is an increasing attention to using alternative materials which can deal with technical drawbacks and sustainability issues associated with those conventional binders. Lime is inefficient in non-pozzolanic soil types whilst Portland cement, with its significant environmental impacts, also suffers from durability problems in aggressive environments.

The talk will present the results from the research work aimed at incorporating industrial by-products and novel additives in binder systems and hence improves the sustainability of soil stabilisation technique while ensuring adequate performance from these new binders. These are ground granulated blastfurnace slag, pulverised fuel ash, cement kiln dust, reactive magnesia and zeolite. A number of model soils representing different typical soil types were used. The binders were applied in both wet and dry forms, in different compositions and in different dosages. Testing includes physical properties, strength, stiffness, permeability and microstructural analyses.

This talk is part of the Engineering Department Geotechnical Research Seminars series.

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