RE-USING WASTE POLYTHYLENE BAGS FOR

SOIL REINFORCEMENT

PRESENTED BY: KRISHNAJITH .K S5 CIVIL

ROLL.NO:28

Introduction

T ypes of stabilizers

Properties of plastic

Physical properties

Chemical properties

Conclusion

R eference

CONTENTS

INTRODUCTION

Soil reinforcement(soil stabilization) means the improvement of stability or bearing capacity of the soil by the use of controlled compaction, proportioning and/or the addition of suitable admixture or stabilisers.

Stabilization is the process of blending and mixing materials with a soil to improve certain properties of the soil. Stabilization can be done with, cement, lime, bitumen, flash.

Now we are using plastic as soil stabilizer.

TYPES OF SOIL STABILIZERS Plastic

Lime Cement-Fly Ash (LCF)

Lime-Fly Ash (LF)

Portland Cement

Bitumen

Lime

PROPERTIES OF PLASTIC

Plastic have a numerous properties T hat make them superior to other materials I n many application

T he diffrent types of properties are Physical , properties chemical properties

PHYSICAL PROPERTIES

Transparency

Flexibility

Elasticity

W ater resistant

E lectrical resistanc

S oft when hot

CHEMICAL PROPERTIES

C hemical resistance

T hermal resistance

R eactivity with water

Flammability

H eat of combustion

SOIL Soil is defined as mineral particles produced by the physical or chemical

disintegration of racks. Soil is also a parent rock. Soil is non –homogeneous, and inorganic Based on origin it can be classified as organic and inorganic

Damages due to swelling soil can be as following:- Rigorous structural damage Cracks develop to basement floor area Condemnation of building Damage to pipelines and sewer lines too

All civil engineering structures are constructed on the soil. Many times engineers encounters with poor or problematic soil like soft soil, swelling soil etc. In old times engineers generally avoid construction on such soil , but now a day due to limitation of land we avoid such solution. Problematic soil can be cause of serious damage of structures. So generally they are replaced by some strong soil or they are treated for better engineering properties. The techniques utilized for enhancement of the properties of those soils are known as ground improvement techniquesHence it become necessary to move forward with suitable methods

MAJOR SOIL DEPOSITS OF INDIA

The soil deposits of India may be classified in following five major groups

Alluvial soil

Black cotton soil

Lateritic soil

Desert soil

Marine deposits

Low bearing capacity soilsBlack cotton soil :Black cotton soils are clay of high plasticity. The soil have high shrinkage and swelling characteristics .the shearing strength of the soil is extremely low the soil are highly compressible and have very low bearing capacity

Marine deposits :-very low shearing strength and highly compressible .they contain large amount of organic matter. The soil is soft and highly plastic

POLYTHYLENE (PLASTIC) BAGS

Plastic Shopping Bag

The material density average 798kg/m3, with the tensile strength ranging between 14 and 20 MPa.. bags of thickness 50 micron ,10mm &15mm and lengths 20 mm,40 mm are adopt and their reinforcement concentration in 0.15%, 0.30%, 0.45% & 0.60% by mass of soil is used for soil reinforcement.

Plastic strips

Using a laser cutting machine, the plastic material was sliced into strips of distinct rectangular dimensions and mixed with the soils for soil reinforcement.

WHY PLASTIC Increased shear strength,

Tensile strength

Cheap

easily available

Durable

Not react with soil

PROCEDURESelect the polyethylene bags of thickness 50 micron Average density of 798kg/m3Cut the polyethylene bags of length 20-,40 and with of 10-15Check the bearing capacity of soil The plastic strips of 0.15%, 0.30%, 0.45% & 0.60% by the weight of soil

Plastic strips changes the property of soil this strips make good bonding between all soil particles and it make more bearing capacity and strength. This is done by the properties of plastics ,

Conditions

Tensile strength ranging between 14 and 20

Thickness of plastic is 50 micron size

Strip 10mm &15mm and lengths 20 mm,40 mm,60 mm are adopt and their reinforcement concentration in 0.15%, 0.30%, 0.45% & 0.60% by mass of soil is used for soil reinforcement. The % is calculated by the level of bearing capacity of soil

CONCLUSIONS The effect of plastic waste pieces on soil is influenced by various

factors such as soil type and plastic waste content. The plastic waste helps to increase the bearing capacity of soil The variation of the friction angle of clayey soil with percentage

of plastic content is a nonlinear variation and similar trend is found in sandy soil.

The plastic pieces decrease the maximum dry unit weight of the soil and optimum moisture content. The variation of optimum water content and maximum dry unit

REFERENCE Kumar, M. A., Prasad, D. S. V. and Prasadaraju, G.V. R. (2009). Utilization of industrial waste in flexiblepavement construction. Electronic Journal ofGeotechnical Engineering, Vol. 13 Purushothama Raj, P. (2005). Soil Mechanics andFoundation Engineering. Pearson Education Arora, K. R. (2004). Soil Mechanics and FoundationEngineering. Standard Publishers Distributors. Bateni, F. (2009). Stabilization Mechanisms of oil palmfruit bunch fiber reinforced silty sand.Unpublished Ph.D. Thesis, University of Auckland. IS: 1888(1982), Method of Load Test on Soils. IndianStandards Institutions, New Delhi. .