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CONTENTS
PageNo.
Title Page i
Certificate of Approval iii
Declaration iv
Certificate by the Supervisor v
Acknowledgement vi
ABSTRACT vii
CONTENTS viii
List of Figures xii
List of Tables xiv
List of Photographs xvii
Chapter 1 INTRODUCTION 1
1.1 General 1
1.2 Need for the Present Study 4
1.3 Objective and Scope of the Work 4
1.4 Organisation of the Thesis 5
Chapter 2 LITERATURE REVIEW 6
2.1 Introduction 6
2.2 Development of Geocell System 6
2.3 Use of Geocell in Sub-surface Layers 6
2.4 Use of Geocell in Surface Layer 7
2.5 Equivalent Elastic Modulus of Cell-filled Concrete Layer 10
2.6 Summary 10
Chapter 3 DETAILS OF TEST SECTIONS 12
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3.1 Introduction 12
3.2 Materials Used for Construction of Cell-Filled Pavements 12
3.2.1 Plastic Cell 12
3.2.2 Cement 14
3.2.3 Sand 14
3.2.4 Soil 14
3.2.5 Moorum Subbase 16
3.2.6 Laterite Boulder Subbase 17
3.2.7 Crushed Aggregate for Subbase and Surface Layer 17 3.2.8 Soil-Cement mix for Subbase and Surface Layer 19 3.2.9 Sand-Cement mix for Surface Layer 20
3.2.10 Roller Compacted Concrete 21
3.2.11 Grouted Concrete 21
3.2.12 Conventional Concrete 22
3.3 Construction of Test Sections 22
3.3.1 Preparation of Subgrade 22
3.3.2 Construction of Subbase 24
3.3.3 Construction of surface layer 26
3.4 Concluding Remarks 30
Chapter 4 STRUCTURAL EVALUATION OF PAVEMENT SECTIONS
31
4.1 Introduction 31
4.2 Salient Features of Fwd 31
4.3 Data Acquisition System 33
4.3.1 Load Measuring Unit 33
4.3.2 Deflection Measuring Unit 33
4.3.3 LabVIEW 8.0 Software 33
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4.4 Calibration of Sensors 35
4.4.1 Calibration of Load Cell 35
4.4.2 Calibration of Geophones 35
4.5 Structural Evaluation of Test Sections 36
4.5.1 Structural evaluation using FWD 37
4.5.2 Structural evaluation using Benkelman beam 39 4.6 Accelerated Loading of Test Sections 42 4.7 Backcalculation of Layer Moduli 54
4.8 Concluding Remarks 57
Chapter 5 DEVELOPMENT OF 3-D FINITE ELEMENT MODEL FOR CELL-FILLED PAVEMENTS
58
5.1 Introduction 58
5.2 Model Geometry 58
5.3 Elements Used in Modeling 60
5.4 Meshing 62
5.5 Analysis of a Typical Pavement 63
5.6 Evaluation of Typical Coefficient of Friction Value for Cell Layer
65
5.7 Equivalent Modulus of Cell-Filled Layer 68 5.8 Effect of Layer Stiffness on the Behavior of Cell-Filled
Pavement
71
5.9 Concluding Remarks 74
Chapter 6 DESIGN OF CELL-FILLED PAVEMENTS 75
6.1 Introduction 75
6.2 Design of Cell-Filled Pavement 75
6.3 Comparison of Pavement Cost 80
6.3.1 Construction Cost 82
6.3.2 Maintenance Cost 83
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6.4 Concluding Remarks 84
Chapter 7 CONCLUSIONS AND SCOPE FOR FUTURE WORK 85 7.1 Important Findings / Conclusions from the Present Study 85
7.2 Scope for Future Study 86
REFERENCES 87
List of Publications
