This document summarizes a seminar presentation on utilizing waste plastic shreds for soil stabilization. The presentation discusses collecting and processing plastic waste, mixing it with soil in various percentages, and testing the plastic-soil mixtures. Testing included compaction tests which measured optimum moisture content and maximum dry density. The results found that adding plastic shreds decreased the optimum moisture content and maximum dry density of the soil samples. The conclusion is that shredded plastic waste has potential as an eco-friendly material for soil stabilization.

1. Seminar topic on
Utilization of Waste Plastic
Shreds for Stabilization of Soil
PRESENTED BY –
GAURAB KUMAR SAHU
REGD NO:- 2121110065
BRANCH:- CIVIL ENGINEERING (6TH SEM)
GOVERNMENT COLLEGE OF ENGINEERING,KALAHANDI

2. CONTENTS
 Introduction
 Material
 Methodology
 Results
 Conclusion
 Reference

3. Introduction
 Soil stabilization process improves the shear strength parameters and
controls load-bearing capacity of a soil. It is mainly used to increase
bearing capacity of a subgrade soil to support pavements and
foundations.
 Plastic material in municipal solid waste generated across the world
has grown because of the widespread increase of single-use plastics in
day-to-day consumer applications. These waste plastics are not a
biodegradable material, hence, may cause serious environmental
pollution.

4. Material
 Plastics are typically collected from various sources, such as plastic
bags, bottles, containers, and other non-biodegradable plastic waste.
After collection, the plastic is processed into suitable forms before
being mixed with the soil

5. Methodology
 The collected plastic should be cleaned and sorted to remove any
contaminants or non-plastic materials.
 then shredded or granulated into small pieces. The size of the plastic
particles can vary depending on the specific application and soil type.
 The samples were subjected to different laboratory tests, such as
moisture content, bulk density, specific gravity, particle size
distribution, Atterberg limits, compaction, and direct shear test.

6. Compaction test
 The plastic-soil mixture into the compaction mold and compact it using
the rammer or compaction hammer. The number of compaction blows
and the height of the drop depend on the chosen Proctor method.
 After compaction, carefully remove the specimen from the mold and
weigh it. Measure its volume using a graduated cylinder or other suitable
method.
 Calculate the dry density of the specimen using the weight and volume
measurements. Also, calculate the moisture content of the specimen.
 Repeat steps 5 to 7 with different moisture contents for the plastic-soil
mixture.

7. RESULT
 After that, optimum moisture content (OMC) and maximum dry density
(MDD) were found by compaction test.
 The following results were observed for the sample 1. OMC was found to
be 19.5% and MDD was 2.05 g/cm3 . After addition of shredded plastic
wastes as reinforcement in various percentages, the following changes
were obtained.
 For addition of 2% of shredded plastic wastes, OMC and MDD were
decreased to 19.1% and 1.86 g/cm3.

8. Optimum moisture content (OMC)
and maximum dry density (MDD)
with different percentages of
wastes for sample 1
Optimum moisture content (OMC)
and maximum dry density (MDD)
with different percentages of
wastes for sample 2

9. CONCLUSION
 Shredded plastic waste can be considered as an eco-
friendly material for soil stabilization. It has lower
carbon content than cement or other hydraulic binders.
 An addition of shredded plastic waste decreased the
maximum dry density and optimum moisture content of
the soil.
 Shredded plastic waste could be used as one of the
waste materials for soil reinforcement in the region
under consideration.

10. REFERENCE
S. Prasanna Department of Civil Engineering, Don Bosco
College of Engineering, Fatorda 403602, Goa, India.