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Finite Element Analysis of Recycled Aggregate Concrete in Freeze/Thaw Condition Using Ansys

ABSTRACT第5页
摘要第6-7页
TABLE OF CONTENTS第7-9页
LIST OF TABLES第9-10页
LIST OF FIGURES第10-11页
CHAPTER 1 INTRODUCTION第11-14页
    1.1 Background of study第11-12页
    1.2 Properties of Concrete第12-14页
CHAPTER 2 RECYCLED AGGREGATE第14-19页
    2.1 Introduction第14-15页
    2.2 Properties of fresh recycled aggregate第15页
    2.3 Uses of Recycled Concrete Aggregate第15-16页
        2.3.1 Reasons for Recycling第16页
        2.3.2 The Economic Benefits第16页
    2.4 Barriers to Recycling第16-17页
    2.5 Effects of recycled aggregates on concrete properties第17-19页
CHAPTER 3 FREEZE/THAW第19-57页
    3.1 Deterioration of concrete in freeze-thaw conditions第19-20页
    3.2 Mechanisms of Frost Damage in Concrete第20-23页
    3.3 Relative Dynamic Modulus of Elasticity (RDME)第23页
    3.4 Durability Factor第23-24页
    3.5 Length Change in Percent第24页
    3.6 Frost action on aggregate第24-26页
    3.7 Factors Controlling the Frost Resistance of Concrete第26-31页
        3.7.1 Air entrainment第27-28页
        3.7.2 Water-cement ratio and curing第28-29页
        3.7.3 Degree of saturation第29-30页
        3.7.4 Strength第30-31页
    3.8 Freezing and salt scaling第31页
    3.9 Amplification of Osmotic Pressures第31页
    3.10 Supercooling第31-32页
    3.11 Thermal Shock第32页
    3.12 Layer-by-Layer Effect第32页
    3.13 Salt Crystallization第32-33页
    3.14 Compressive strength第33页
    3.15 Flexural and tensile strength第33-35页
    3.16 Bond strength第35页
    3.17 Modulus of elasticity第35页
    3.18 Creep and shrinkage第35-37页
        3.18.1 Effect of high temperature on hydrated cement paste第36-37页
        3.18.2 Effect of high temperature on aggregate第37页
    3.19 Mathematical Model Governing the Durability of Freeze-Thaw Concrete第37-57页
        3.19.1 Sorption Isotherms第39-49页
        3.19.2 Water Diffusion第49-53页
        3.19.3 Heat Transfer第53-54页
        3.19.4 Cracking Due to Freezing第54-57页
CHAPTER 4 FINITE ELEMENT ANALYSIS第57-73页
    4.1 Overview of Finite Element Software第57-59页
    4.2 Analysis and Results第59-62页
    4.3 Concrete material properties第62-66页
    4.4 FEM Data input第66页
    4.5 Meshing第66-67页
    4.6 Loads and Boundary Conditions第67-69页
    4.7 Crack modeling第69-71页
    4.8 Crush modeling第71-72页
    4.9 Nonlinear Solution第72-73页
CHAPTER 5 CONCLUSIONS AND RECOMMENDATIONS第73-75页
    5.1 Conclusions第73-74页
    5.2 Recommendations for Future Work第74-75页
REFERENCES第75-81页
ACKNOWLEDGEMENT第81页

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