This document discusses using plastic bottle strips to stabilize soil. Unstable expansive soils like black cotton soil cause problems for foundations due to swelling, shrinkage, and unequal settlement. Soil stabilization is done to improve strength and prevent erosion. Plastic is a good stabilizer as it is flexible, water resistant, and provides thermal resistance. Tests on lateritic soil mixed with plastic strips at 0.6% found increased CBR values and reduced settlement under loading compared to unmixed soil, demonstrating plastic's effectiveness as a stabilizer. Using waste plastic bottles in this way provides an economical solution while reducing plastic waste.

1. SOIL STABILIZATION
USING PLASTIC
BOTTLE STRIPS
BY : : TA N I S H A N AYA K

2. PROBLEMS IN UNSTABILISED SOIL
Expansive soil is risky due to its high compressibility, low shear strength and high
permeability
Expansive soils like black cotton soil always create problems in foundation. The
problems are swelling, shrinkage and unequal settlement

3. WHY WE STABILISE THE SOIL
A. Improves the strength of the soil, thus, increasing the soil bearing capacity
B. Prevent soil erosion or formation of dust
C. In dry and arid weather stabilization is also done for soil water-proofing
D. Improves the workability and the durability of the soil.
E. It is more economic both in terms of cost and energy

5. WHY TO CHOOSE PLASTIC AS SOIL
STABILZER
Transpare
ncy
Soft
When It
Is Hot
Flexibility
Chemical
Resistance
Elastic
Thermal
Resistance
Water
Resistant
Reactivity
With Water
Electrical
Resistance
Flammabili
ty

6. TEST FOR CHECKING OF SOIL
STABILISION
COMPACTION CBR TEST
PLATE LOAD
TEST

7. MATERIALS
•Materials
–Lateritic Soil
–Plastic Bottles (both cut and uncut)
–Sea Sand
–Synthetic Threads

8. METHODOLOGY
Plate load
test
CBR
Standard
Proctor
Compaction
𝒓 𝒅 𝒘 𝒘
Optimum
Amount of
Plastic Strips

10. Optimum
Amount
of Plastic
Plain Lateritic Soil

11. RESULTS AND DISCUSSIONS
•Compaction
𝒓 𝒅 =18.95
𝑘𝑁
𝑚3
𝒘 𝑳=11.2%

12. % of Plastic
Content
CBR
Value
0 1.9
0.2 1.7
0.4 1.8
0.6 2.5
0.8 1.3
1 1.3
0, 1.9
0.2, 1.7
0.4, 1.8
0.6, 2.5
0.8, 1.3 1, 1.3
0
0.5
1
1.5
2
2.5
3
0 0.2 0.4 0.6 0.8 1 1.2
CBRVALUE
% OF PLASTIC CONTENT
CBR Value

13. RESULTS FROM PLATE LOAD TEST
Tests done on
Settlement
(mm)
Corresponding
Load (kg)
Percentage variation
of load from plain soil
Plain soil 4 440
Sand filled bottles at
D/B=0.67 4 585 33
Sand filled bottles at D/B=1 4 680 54.5
Bottles cut to halves at
D/B=0.67 4 740 68.1
Bottles cut to halves at
D/B=1 4 900 104.5
Soil mixed with optimum
percentage(0.6%) of Plastic
strips 4 1200 172.7

14. RESULTS FROM PLATE LOAD TEST

15. DISCUSSIONS FROM PLATE LOAD
TEST RESULTS
At optimum Settlement is Lesser & Stability is More

16. ULTIMATE LOAD AND CORRESPONDING SETTLEMENT
Tests done on
Ultimate
load(kg)
Corresponding
settlement(mm)
Plain soil 360 1.60
Sand filled bottles at D/B=0.67 480 1.20
Sand filled bottles at D/B=1 560 1.60
Bottles cut to halves at D/B=0.67 600 1.20
Bottles cut to halves at D/B=1 760 1.60
Soil mixed with optimum
percentage(0.6%) of Plastic
strips 720 0.60

17. 0
100
200
300
400
500
600
700
800
ULTIMATELOAD(Kg)
Variations of ultimate load for various test
arrangements
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
SETTLEMENT
Variations of settlement
corresponding to the
ultimate load for various test
arrangements

18. CONCLUSIONS
• Using plastic bottles as a soil stabiliser is an
economical and gainful utilization since there is
scarcity of good quality soil for embankments and
fills.
• Thus this project is to meets the challenges of society
to reduce the quantities of plastic waste, producing
useful material from non-useful waste materials that

19. THANK YOU