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Thermal Conductivity and Its Effects on the Performance of PCC Pavements Louisiana State University LSU Digital Commons LSU Master's Theses Graduate School 2010 Thermal conductivity and its effects on the performance of PCC pavements in MEPDG Upender Kodide Louisiana State University and Agricultural and Mechanical College, [email protected] Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_theses Part of the Civil and Environmental Engineering Commons Recommended Citation Kodide, Upender, "Thermal conductivity and its effects on the performance of PCC pavements in MEPDG" (2010). LSU Master's Theses. 1829. https://digitalcommons.lsu.edu/gradschool_theses/1829 This Thesis is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Master's Theses by an authorized graduate school editor of LSU Digital Commons. For more information, please contact [email protected]. THERMAL CONDUCTIVITY AND ITS EFFECTS ON THE PERFORMANCE OF PCC PAVEMENTS IN MEPDG A Thesis Submitted to Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Master of Science in Civil Engineering in The Department of Civil and Environmental Engineering By Upender Kodide B.E., Osmania University, 2007 December, 2010 ACKNOWLEDGEMENTS I am indebted to my advisor, Dr. Hak-Chul Shin, for his exemplary patience, guidance, and support. He taught me the approach to problems in research, inspired me to be patient when progress was slow, and to overcome all obstacles on my way toward completing my thesis. I would also like to extend my gratitude to my committee members, Dr. Mostafa Elseifi and Dr. Sherif Ishak, for their valuable suggestions and kind support. I also want to convey my sincere thanks to Yoon Seok Chung for his time and effort toward the successful completion of this study. I would like to thank Tyson Rupnow, Randy Young, and Shane in Louisiana Transportation Research Centre for their support and for providing the required data. I want to thank all my friends who assisted me in my endeavors, with a special thanks to Cosma Indica, Dilip, Kalyan, Rajkiran, Raghavendra, and Venu for their invaluable support rendered during the progress of this thesis. I wish to endow my earnest gratitude to my father, Venkata Ramakrishna Kodide, and my mother, Padma Kodide, who believed in me and have been thorough all my rough times. I also want to express special thanks to my entire family for their affection, support, and compassion. Finally, I dedicate this thesis to my mother, Padma, without whose blessings, this would not have been a reality. ii TABLE OF CONTENTS ACKNOWLEDGEMENTS ............................................................................................................ ii LIST OF TABLES .......................................................................................................................... v LIST OF FIGURES ...................................................................................................................... vii ABSTRACT ................................................................................................................................... xi CHAPTER 1 INTRODUCTION .....................................................................................................1 1.1 Background .......................................................................................................................... 1 1.2 Problem Statement ............................................................................................................... 2 1.3 Objectives ............................................................................................................................. 2 1.4 Outline .................................................................................................................................. 3 CHAPTER 2 LITERATURE REVIEW ..........................................................................................4 2.1 Mechanistic Empirical Pavement Design Guide (MEPDG) ................................................ 4 2.2 Thermal Conductivity ........................................................................................................... 5 2.2.1 Thermal Conductivity (K)......................................................................................... 5 2.2.2 Methods for Determining Thermal Conductivity: .................................................... 6 2.3 Heat Capacity ..................................................................................................................... 10 2.4 Effect of Moisture on Thermal Properties .......................................................................... 10 2.4.1 Moisture Measurement Methods ............................................................................ 11 2.4.2 Ultrasonic Pulse Velocity Method .......................................................................... 11 2.4.3 Ground Penetrating Radar (GPR) ........................................................................... 12 2.4.4 Multi-ring Electrode................................................................................................ 12 2.4.5 Nuclear Magnetic Resonance (NMR) ..................................................................... 13 2.5 Effect of Aggregates ........................................................................................................... 13 2.6 Effect of Age, Admixture, Cement Paste and Porosity ...................................................... 15 2.7 Enhanced Integrated Climatic Model (EICM) ................................................................... 15 CHAPTER 3 METHODOLOGY ..................................................................................................20 3.1 Testing Equipment ............................................................................................................. 20 3.2 Concrete Mixture Design ................................................................................................... 23 3.2.1 Mixtures with Different Aggregates ....................................................................... 23 3.2.2 Mixtures with SCM’s .............................................................................................. 23 3.2.3 Temperature Measurement ..................................................................................... 26 3.3 Experimental Procedure ..................................................................................................... 28 3.4 Analysis of Test Results ..................................................................................................... 29 3.5 Effects of Specimen Size on Thermal Conductivity and Calibrating Experimental Procedure .................................................................................................................................. 29 3.6 EICM Analysis ................................................................................................................... 33 3.6.1 First Analysis .......................................................................................................... 34 3.6.2 Second Analysis ...................................................................................................... 36 iii 3.7 MEPDG Analysis ............................................................................................................... 37 CHAPTER 4 RESULTS AND DISCUSSION ..............................................................................39 4.1 Effect of Aggregate Types on Thermal Conductivity ........................................................ 39 4.2 Effect of Admixtures on Thermal Conductivity and Moisture .......................................... 41 4.3 Statistical Analysis Method ................................................................................................ 44 4.4 Prediction Model of Thermal Conductivity ....................................................................... 45 4.4.1 Aggregate Percentage Effect................................................................................... 45 4.4.2 Effect of Moisture Content ..................................................................................... 47 4.5 Effect of Ternary Mixtures on Moisture Content ............................................................... 49 4.6 EICM Modeling Results ..................................................................................................... 54 4.7 MEPDG Analysis Results .................................................................................................. 63 CHAPTER 5 SUMMARY, CONCLUSION AND RECOMMENDATIONS..............................68 5.1 Summary and Conclusion .................................................................................................. 68 5.2 Recommendations .............................................................................................................. 73 REFERENCES ..............................................................................................................................74 APPENDIX – A: THERMAL CONDUCTIVITY AND HEAT CAPAPCITY VALUES OF SPECIMEN WITH DIFFERENT SIZE AND SHAPE ...................................77 APPENDIX – B: THERMAL CONDUCTIVITY AND HEAT CAPACITY READINGS FOR DIFFERENT AGGREGATE MIXTURES, TERNARY MIXTURES AND THEIR VARIANCE ..............................................................................78 APPENDIX – C: THERMAL CONDUCTIVITY AND HEAT
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