IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 17, Issue 4 Ser. I (Jul. – Aug. 2020), PP 25-31 www.iosrjournals.org DOI: 10.9790/1684-1704012531 www.iosrjournals.org 25 | Page Stabilization of Cochin Clay with ESP and Shredded LPDE Aneesh P.C 1 Abu Thalib A.H 1 , Aswathy Murukan 1 , Deneesh Mathew 1 , S Gladis 1 Civil Engineering Department, Adi Shankara Institute of Engineering And Technology, KTU, India Abstract: Soil is one of the important materials in a variety of construction projects including pavements, earth canals and earth dams. Most of the failures of soil have been due to its poor strength. Usage of chemical admixtures such as cement, lime, bitumen etc. in soil stabilization is highly expensive. Therefore it’s preferable to replace these by another kind of soil addictive to make them economical and eco-friendly. In our study we will do an experimental study on stabilization of Cochin clay using eggshell powder and plastic waste in varying proportions. Three various proportions of eggshell powder (2%, 5%, 8%) plastic wastes (0.25%, 0.5%, 0.75%, 1%) were added to obtain optimum percentage of each additive. The analysis was done by compaction, unconfined compression. The eggshell powder, shredded plastic waste contents and duration will have significant effect in engineering properties of soil. After the stabilization of the Cochin clay the optimum percentage was obtained and a mathematical model was prepared using Microsoft excel and the concepts behind it is multiple regression and the mathematical model is used for the forecasting purpose of for the prediction of optimum percentage of stabilizing agents needed. Key Word: Eggshell powder; Plastic waste; Optimum percentage; Compaction; Unconfined compression strength; Mathematical modelling. --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 30-06-2020 Date of Acceptance: 16-07-2020 --------------------------------------------------------------------------------------------------------------------------------------- I. Introduction Structures that are constructed over weak and soft soils possess difficulties like poor strength, differential settlement, and high compressibility. Foundation is important for any land based structure and has to be strong enough to support the entire structure. And for the foundation to be strong its surrounding soil plays a very critical role. In order to work with them we need to have a proper knowledge on soil, its properties and various factors affecting them. To conform to desired characteristics or for the improvement of unstable soil both in case of strength and durability, soil stabilization is a remedy. In our study we are dealing with Cochin clay. Cochin clay is very soft soil deposited around Indian Peninsula. Clay can be located onshore as well. These soft clay are categorized by high compressibility and low shear sstrength. For the past two decades, a large scale construction activities has been witnessed in the port city of Cochin in India due to rapid industrialization of the area. Most of the greater Cochin area consist of extremely soft clay, causing tremendous problems for foundation engineers. Here we use eggshell powder (ESP) and shredded plastic as the stabilizing agents. Through journals it’s proven that ESP has similar chemical composition to lime and hence it could be used as a good replacement to lime. Plastic waste has also become a serious problem in the world. Though plastic has been banned, we have to find some alternatives to dispose the plastic that's been present from its very beginning and usage.Since then an iincrease in the use of plastic waste by the customers has resulted in municipal solid waste, an ever growing plastic waste which were used for a short time and then disposed or discarded. The linear consumption of these plastic waste and its disposal to the environment led to challenges such as marine and urban littering, diminishing landfill etc. Thus it’s necessary to find alternate met hod to use plastic and prevent its harmful effect on environment and society. The main objective of the study is first to investigate the stabilizing effectiveness of Cochin clay using eggshell powder and plastic waste. Secondly to obtain an optimum percentage of stabilizing agent to ameliorate its strength characteristic. And finally to develop a mathematical model for forecasting. II. Material And Methodology 2.1Soil The soil has been collected from Cochin refinery, a subsidiary of BPCL Puthuvype. The clay sample was collected from a depth of 10m from the ground surface. The collected sample was dark in colour and rich in moisture ccontent.It was sundried for 4-5 days to proceed with various test.(Figure1)The index, geotechnical and engineering properties are given in table 1.