A study on stabilisation of lithomargic soil with GGBS and LIME

Deepak, Nayak and Sarvade, Purushotham G and Pai, Jagadeesha B and Desai, Dhairya and Kurtarkar, Nithin and Shubham, . (2016) A study on stabilisation of lithomargic soil with GGBS and LIME. In: International Symposium on Lowland Technology, 15/09/2016, Ocean Pearl Hotel, Mangalore.

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Abstract

Lithomargic soil, locally known as Shedi soil, is found at shallow depths usually below the lateritic soil. These soils are the product of tropical or subtropical weathering. These types of dispersive soils are highly susceptible to erosion. The pavements that are constructed on the sub-grade made of lithomargic soil do not possess the required shear strength in wet conditions. The presence of silt in lithomargic soils invite many problems such as slope failures, embankment failures, uneven settlements etc. Hence, there is a need to stabilize these type of soils to suit the requirements for use as sub-base. In order to create a sturdy and stable platform for pavement, soil stabilization using ground granulated blast furnace slag (GGBS) was employed in this study. The evaluation of soil properties like Maximum Dry Density (MDD), Optimum Moisture Content (OMC) and soaked and unsoaked California Bearing Ratio (CBR) test was carried out. An attempt was made to replace the lithomargic soil using GGBS at an interval of 5%. Based on the CBR results, 10% GGBS replacement was found to be the optimum mix. Further improvement of the soil was made by adding lime as a binder with the optimum mix. Lime proved to be extremely efficient showing an increase in unsoaked and soaked CBR value of 46% and 41% for optimum mix, respectively. X Ray Diffraction (XRD) analysis revealed the presence of tobemorite, which indicates the presence of Calcium Silicate Hydrate (CSH) or Calcium Alluminate Hydrate (CAH) gels in the stabilized mixture which aided us in reasoning out the improvement in the soil characteristics.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Lithomargic Soil, Soil Stabilization, GGBS, Lime, CBR, XRD, Tobemorite, CSH, CAH
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 20 Oct 2016 13:22
Last Modified: 10 Jan 2017 16:15
URI: http://eprints.manipal.edu/id/eprint/147310

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