This document presents a student project on using waste plastic bottles to improve soil. The objectives are to provide an alternative solution for plastic waste disposal, use plastic waste to economically stabilize soil, and determine the optimum plastic content. The literature review discusses previous research on plastic improving soil bearing capacity and strength. The research methodology involves triaxial and direct shear tests to measure shear strength and determine the effect of increasing plastic content on bearing and shear capacities. The expected outcome is that bearing capacity will initially increase with plastic content up to an optimum level, above which it will decrease.

1. Khulna University of Engineering & Technology
BECM 4000
Project and Thesis
Supervised by-
Md. Ikramul Hoque
Assistant Professor,
Dept. of BECM, KUET
Optimum Utilization of Waste Plastic Bottles in Soil
Improvement Techniques
Presented by-
Md. Zamirul Islam (1423044)
Samiul Kabir (1423052)

2. Contents
 Introduction
 Objectives
 Literature Review
 Research methodology
 Expected Outcome
 References

3. Introduction
 Soil stabilization means the improvement
of stability or bearing stress. (ref. Anas
Ashraf and Arya Sunil 2011)
 Stabilization is the process of blending
and mixing plastic materials with soil.
 Effect of waste bottle chips on strength
parameters of cohesive soil.
 Ultimate plastic use in soil until decrease
the value of shear strength , bearing
capacity.

4. Objectives
 Provide an alternative solution for
the disposal of plastic waste.
 Provide an economical solution for
Soil stabilization using plastic waste
determine the optimum plastic
content to be used.
 By using industrial waste we will
make the environment friendly.
 Increase shear strength, tensile
strength of the soil by decrease the
compressibility of the soil.

5. Plastic proportioned
increase up to 8%
mixed bearing
capacity test (ref. Dr.
A.I. Dhatrak 2015)
Optimum
percentages of waste
plastics, quarry dust
in soil sample (ref.
CHOUDHARY, JHA
AND GILL 2010)
Literature Review
Continue ….

6. Soil reinforcement
plastic waste fiber
curing out UCT for
tensile strength
(ref. Huntohar
2004)
Plastic water
bottle through
model plate load
tests showed
ultimate bearing
capacity (ref. S.W.
Thakare and S. K.
Sonule 2013)
HDPE plastic
waste on the UCS
of soil ( ref.
AKSHAT
MALHOTRA AND
HADI GHASEMAIN
2014 )

7. Research methodology
i. Tri-Axial Test
 Measurement shear strength.
 Saturation of soil
 Confined stresses
 Vertical stresses
 Unconsolidated Undrained Test
(UU)
 Consolidated Undrained Test
(CU)
 Consolidated Drained Test (CD) Continue ….

8. ii. Direct Shear Test
 Determine the shear parameters of
soil by using shear Box apparatus
 Shear strength parameters of a silty
or sandy soil at known density and
moisture content
 Determine shear strength cohesive
and non cohesive soil
 Determine the consolidated-drained
shear strength of soil
Continue ….

9. Use plastic trips
increasing
percentage in soil
Determine
bearing strength
and shearing
strength of soil
Direct Shear Test
/Tri-Axial Shear
Test
Optimum use
of plastics
trips
What value for
cohesion (c) and
angle of friction
(ø),optimum use
of plastic
What value for
bearing &
shearing strength
at optimum use of
plastic
Optimum use of
plastics trips until
decreasing of
bearing capacity,
shearing capacity

10. Expected Outcome
The bearing capacity value has been
increasing up to expected plastic
content and there on it started to
decrease.
Expected plastic content is the
optimum content of utilization of
waste plastic in the soil.
Determine ultimate bearing capacity
and shearing capacity.

11. References
1. Anas Ashraf and Arya Sunil (2011) “Soil Stabilization Using Raw Plastic
Bottles. Indian Geotechnical Conference”, (Paper no. H-304).
2. Arpan Laskar, Dr. Sujit Kumar Pal “Effects of Waste Plastic Fibres on
Compaction and Consolidation Behavior of Reinforced Soil” ,Vol. 18 [2013].
3. Rajkumar Nagle, Prof. R.Jain,“Comparitive study of CBR of soil,
reinforced with natural waste plastic material” ,IJESR/June 2014/ Vol-
4/Issue-6/304-308.
4. Hataf, N., Rahimi, M. (2006). “Experimental investigation of bearing
capacity of sand reinforced with randomly distributed tire shreds.” J. Constr.
Build. Mater. 20 (10).

12. Thank You