International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 06 | Jun 2022
www.irjet.net
e-ISSN: 2395-0056 p-ISSN: 2395-0072
Analysis of CBR value of Soil Reinforced with PET Bottles Sumit Singh Sinwal1, Ravishankar Rawat2, Dikshant Bisht3, Aryan Raj4 1,2,3,4 UG
students, Dept. of Civil Engineering, DIT University, Dehradun, Uttarakhand, (India) ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Soil is a most important component of the earth's ecosystem but now a day’s soil is getting polluted because of waste disposal directly into it. One of the major waste is plastic. This paper explains the stabilization of soil using PET (Polyethylene Terephthalate) which is found frequently on earth surface. Use of PET as a reinforcing material will help in reducing the amount plastic waste on earth surface and also it will help in improving the physical properties of soil like shear strength, bearing capacity. PET bottles are used in the form of chips in different proportion (0.0%, 0.25%, 0.50%, 0.75%, 1.00%, 1.25% and 1.50%), then CBR test is conducted. Key Words: PET, CBR value, Soil Stabilization, Bearing Capacity, Plastic Waste.
1. INTRODUCTION
Figure 1: PET Chips
3. METHODOLOGY
In this study PET (Polyethylene Terephthalate) plastic has been used as reinforcing material in soil which is most commonly used to make plastic bottles, plastic carry bags, cold drink bottles, shopping bags. PET has been used in different proportion (0.0%, 0.25%, 0.50%, 0.75%, 1.00%, 1.25% and 1.50%) and a series of CBR tests were conducted on soil sample with these varying percentages of PET plastic. Results of CBR tests showed that addition of waste PET in soil has improved the CBR value of soil. The PET content was taken by weight of dry sample prepared for CBR test. Using waste PET in soil makes the soil stabilization technique economical and also solves the problem of waste disposal.
2. MATERIAL
3.1 Laboratory Tests 3.1.1 Bulk Density & Dry Density Table 1: Observation table for Core Cuter test Observation Weight of empty core cutter (W1) Weight of core cutter + soil (W2) Height of core cutter (W3) Internal diameter of core cutter (W4)
Value 0.980 Kg 2.869 Kg 127.5 mm 100mm
2.1 Soil Sample The soil type used in this study was alluvial soil which was collected from the DIT University Campus and then tested for its physical properties.
2.2 PET Plastic
3.1.2 Liquid Limit Table 2: Observation table for liquid limit test
PET consists of polymerized units of the monomer ethylene terephthalate, with repeating (C10H8O4) units. PET bottles were collected from local market and used in the form of chips of size 1cm*2cm in different proportion of 0.0%, 0.25%, 0.50%, 0..75%, 1..00%, 1.25% and 1.50%.
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Bulk density (γb) of soil sample = 1.88 g/cm3 Dry density (γd) of soil sample = 1.63 g/cm3
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Impact Factor value: 7.529
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Observation
1
2
3
4
No. of Blows
35
26
15
9
Mass of Empty Container (M1) in gm
12
15
10.5
11
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