International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
A Comparative Study on the Effects of Different Waste Materials on Weak Soil for Better Pavement Subgrade Alina Marcus1, Fathima Sakeer2, Sarath.T.P3, Sheela .J. George 4, Dr. Solly George5 Under – Graduate Students, 5 Professor 1, 2, 3, 4,5 Department of Civil Engineering, Mar Athanasious College of Engineering, Kothamangalam, Kerala, India 1, 2, 3, 4
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Abstract-Civilization has always developed around the coastal region. These are covered with thick soft marine clay deposits. This clay has only less strength and possesses high deformation, low permeability and limited bearing capacity. Due to the poor engineering properties and characteristics of these clays, they possess several foundation problems to various coastal structures and pavement sub-grade problems. Mixing of glass powder, plastic strips and quarry dust with this weak soil helps to enhance the desired properties of marine clay. Thus materials which were considered as a curse to the environment have turned out to be boon to the civil engineering community. Key words: CBR, permeability, aspect ratio (AR), marine clay, Glass powder, plastic strips, ferric chloride, quarry dust.
I. INTRODUCTION
With an increase in population the availability of land for construction activities are reduced. So engineers are forced to construct on a given site with given soil conditions like that of marine clay. This is same in case of pavement construction also. With existing environmental regulations, protest from people and other land acquisition problems it is not possible to get suitable site with required soil properties for road construction. So it is necessary to reinforce the available weak soil stratum to get the required strength and other properties. The objectives of the research include: 1) To compare the effectiveness of various additives on marine clay. 2) To find a method to improve the strength of marine clay. 3) Use of waste materials effectively as soil stabilizer.
1.1 Literature Review Dr. D S V Prasad(2015) explained the strength behavior of marine clay treated with rice husk ash. The clay was mixed with rice husk ash waste from 0-25% at an increment of 5%.From the analysis of test result it was obtained that, specific gravity decreases, liquid limit and plastic limit increases, compaction parameters such as Š 2017, IRJET
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Impact Factor value: 5.181
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maximum dry density and OMC values were increased and CBR values was increased up to the addition of 20% rice husk and beyond that there was no visible effect. I Olufowobi(2014) studied the stabilization of clay soil using powdered glass with 15% cement. The maximum value for CBR was obtained with 5% glass powder addition. But maximum value of shear test was obtained with the addition of 10% glass powder. It can be concluded that glass powder can be effectively used as an additive.
2. MATERIALS AND METHODOLOGY 2.1 Materials
The major materials which have been used in the experimental investigation include: A. Soil (Marine clay) The marine clay was collected from Moolampilly-Pizhala bridge site. It was collected from a depth of 2 to 3 meter. The clay was greyish black in colour. B. Glass powder The waste broken glass was collected from a shop at Thankalam , Kothamangalam .It was plane white coloured glass . C. Plastic bottle strips The plastic bottles were collected from various catering centres near Muvattupuzha. The bottles were of uniform size. D. Ferric chloride and Quarry dust The quarry dust used in this study was brought from a Roy Mathew crushers at Palakkad. Commercial grade anhydrous ferric chloride was used in this study.
2.2 Methods
Preliminary studies were conducted to analyse the geotechnical properties of marine clay such as liquid limit and plastic limit, compaction test to determine the optimum moisture content and dry density from which the optimum moisture content value is used to determine the unconfined compressive strength and California bearing ratio of marine clay. The properties obtained for marine clay is shown in table 1. Compaction tests, unconfined compressive strength and California bearing ratio were also conducted for stabilized soils and results were analysed.
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