PROPERTIES AND APPLICATIONS OF SOIL IMPROVED BY CEMENT AND EPS BEADS
PROPERTIES AND APPLICATIONS OF SOIL IMPROVED BY CEMENT AND EPS BEADS
Mingdong Li(李明东), Junxia Liu(刘俊霞), Jingwu Zhang(张京伍), Jinxiang Yi(易进翔), Lingzhi Shan(单凌志)
Zhongzi Planning and Design Research Co., Ltd
East China University of Technology
Copyright © 2022 by Cayley Nielson Press, Inc.
ISBN: 978-1-957274-09-6
Cayley Nielson Press Scholarly Monograph Series Book Code No.: 212-4-8
Series of Scientific Advances in Geological Environment & Underground Engineering, Volume III
Editor in chief: Li, Mingdong and Xue, Kaixi（李明东，薛凯喜）
Editors: Yi, Jinxiang; Zhang, Jingwu; Zhu, Liping; Yang, Ting; Xu, Tao; Wang, Shengfu; Shan, Lingzhi; Wan, Yukuai (易进翔，张京伍，朱丽萍，杨婷，许涛，王升福，单凌志，万愉快)
US$150.00
Preface
The solidification and reutilization of sludge as filling has become an effective way to deal with a large number of dredged sludge. Expanded polystyrene(EPS) beads, which have a extremely low density, are added to the solidified sludge to produce a lightweight geomaterial, which can reduce the cost of ground improvement. This method has been applied in many projects in China and abroad, confirming its superiority. Series study were done by our team, including material proportioning, construction method, engineering properties and case study. They are now being concluded to this monograph, which will introduce/induct the research and application of EPS beads improved soil.
East China University of Technology
Nanchang,Jiangxi, China
November 10,2021
Contents
Preface I
Chapter 1 1
Density and Strength Properties of Sand-Expanded Polystyrene Beads Mixture 1
1.1 Introduction 1
1.2 Speciments Preparartion 2
1.3 Test Method 3
1.4 Results 4
1.5 Discussion 9
1.6 Conclusions 9
Chapter 2 11
Compaction model of soil improved by Expanded Polystyrene Beads 11
2.1 Introduction 11
2.2 Compact physical model 11
2.2.1 Physical model of density 12
2.2.2 Strength physical model 15
2.3 Test method 18
2.3.1 Materials and formulations 18
2.3.2 The compaction scheme 19
2.3.3 Observable indicator 21
2.3.4 Indicator test methods 21
2.4 Influence of hitting function on physical mechanical properties 26
2.4.1 Influence the implementation method on density 26
2.4.2 Hit the impact of the function 28
2.4.3 Influence the impact of migration 34
2.5 Effect of compaction functions 39
2.5.1 Compact physical effect 39
2.5.2 Density mechanism 42
2.5.3 Strength mechanism 44
2.6 Discussion 46
2.6.1 SELS's trial 46
2.6.2 SELS's hitting parameters 47
2.7 Summary 47
Chapter 3 49
Optimum Compaction Moisture Content of EPS Particles Mixed Light Soil in Sandy Soil 49
3.1 Introduction 49
3.2 Test Materials and Methods 50
3.2.1 Testing material 50
3.2.2 Test scheme 50
3.2.3 Test method 51
3.3 Effect of compaction moisture content on physical and mechanical properties 52
3.3.1 Effect of compaction moisture content on density 53
3.3.2 Effect of compaction moisture content on unconfined compressive strength 54
3.4 Determination of optimum compaction moisture content 56
3.5 Introducing Parameter Ratio Strength to Characterize Lightweight and High Strength 57
3.6 Relationship between specific strength and compaction moisture content 57
3.7 Optimal compaction moisture content determination method based on specific strength 58
3.8 Calculation formula of optimal compaction moisture content 59
3.9 Conclusion 61
Chapter 4 62
Mechanical properties of Expanded Polystyrene Beads Stabilized Lightweight Soil 62
4.1 Introduction 62
4.2 Materials and Testing Methods 64
4.2.1 Sands 64
4.2.2 EPS Beads 65
4.2.3 Binder 65
4.2.4 Specimens Preparation 66
4.2.5 Physical Properties Tests 67
4.2.6 Mechanical Properties Tests 68
4.3 Results and Discussion 68
4.3.1 Physical Properties 68
4.3.2 Unconfined Compressive Strength 72
4.3.3 Stress-strain Relationship 75
4.3.4 Shear Strength, cohesion and friction angle 75
4.3.5 Volumetric Strain Characteristics 80
4.3.6 Discussions on Material proportions description 80
4.3.7 Discussions on test condition of unconfined compressive strength (UCS) 81
4.3.8 Discussions on the design of EBSLS based on the relationships between shear strength and lightweightness 83
4.4. Conclusions 83
Chapter 5 86
Mechanical properties of foam mixed light soil under cyclic 86
5.1 Introduction 86
5.2 Test method 87
5.2.1 Properties of Light Soil under Cyclic Loading 89
5.2.2 Stress and strength 90
5.2.3 Strain 91
5.2.4 Stress-strain relation 96
5.3 Conclusion and foresight 97
Chapter 6 98
Effect of Silled EPS Particle Mixed Light Soil Mock Shear Strength 98
6 .1 Test materials and methods 98
6.1.1Testing material 98
6.1.2 Test scheme 98
6.1.3 Sample preparation process 100
6.1.4 Test method 100
6.2 The variation law of cohesion 101
6.2.1 Effect of cement content on cohesion 101
6.2.2 Effect of EPS Particle Addition on Cohesion 102
6.2.3 Effect of age on cohesion 103
6.3 The variation law of internal friction angle 104
6.3.1 Effect of cement content on internal friction angle 104
6.3.2 Effect of EPS particle addition on internal friction angle 105
6.3.3 Effect of age on internal friction angle 106
6.4 Conclusion 107
6.5 Test Materials and Sample Preparation 107
6.5.1 Test Materials and Sample Preparation 107
6.5.2 Test method 109
6.5.3 Test results 110
1 Meso-failure characteristics of light-weight mixed soil specimens 110
2 Law of shear strength envelope of light-weight mixed soil sample 111
3 Shear strength mechanism of light-weight mixed soil specimen 117
4 Conclusions 120
6.6 Calculation method of cohesive force 121
6.6.1 Composition of shear surface 121
6.6.2 Physical and mechanical relations on shear plane 122
6.6.3 Calculation method of cohesive force 123
6.6.4 parameter gaining 124
6.6.5 Simplification of calculation method 125
6.7 Verification of calculation method 126
6.7.1 Testing material 127
6.7.2 Test scheme 128
6.7.3 Experimental process 128
6.7.4 Verification of Test Results and Calculation Formula 129
6.8 Conclusion and foresight 130
Chapter 7 132
Study on the normative model of dredging sludge EPS particle lightweight mixed earth 132
7.1 Introduction 132
7.2 Establishment of volume yield surface of 111 light mixed soil 133
7.3 Establishment of shear yield surface of lightweight mixed soil 137
7.4 Model test verification 140
7.5 Conclusion 143
Chapter 8 144
Deformation and Damping Characteristics of Lightweight Clay-EPS Soil under Cyclic Loading 144
8.1 Introduction 144
8.2 Materials and Methods 147
8.2.1 Clay 147
8.2.2 Cement 148
8.2.3 Expanded Polystyrene (EPS) Beads 148
8.2.4 Test Design 149
8.2.5 Preparation of Specimens 149
8.2.6 Test Methods 150
8.3 Results and Discussion 151
8.3.1 Time History Character Curve of Strain of LCES 151
8.3.2 Dynamic Secant Elastic Modulus of LCES 153
8.3.3 Damping Ratio of LCES 158
8.4 Conclusions 161
Chapter 9 163
Stress-strain behaviour of reinforced dredged sediment and expanded polystyrenes mixture under cyclic loading 163
9.1 Introduction 163
9.2 Materials and Methods 167
9.2.1 Dredged sediment and control clay 167
9.2.2 Cement 169
9.2.3 EPS beads 169
9.2.4 Test combinations of RDSEM 169
9.2.5 Preparation of specimens 170
9.2.6 Measurement methods 170
9.3 Results and Discussions 172
9.3.1 Characteristics of cyclic stress-strain relationship of RDSEM 172
9.3.2 Effect of cement content on cyclic stress-strain relationship of RDSEM 174
9.3.3 Effect of EPS beads content on cyclic stress-strain relationship of RDSEM 175
9.3.4 Effect of confining pressure on cyclic stress-strain relationship of RDSEM 179
9.4 Conclusions 179
Chaper10 182
Construction technology and application examples of EPS particle mixed lightweight soil 182
10.1 Project profile 182
10.2 Construction technique 184
10.2.1 Building machinery 184
10.2.2 Amount of raw material 184
10.2.3 Construction technics 185
10.3 Application effect and monitoring 187
10.3.1 Laboratory experimental results 187
10.3.2 Results of test on site 188
10.4 Problems and Treatment in Construction 189
10.4.1 Treatment of construction load 189
10.4.2 Rolling quality control 190
10.4.3 Improvement of Construction Machinery 190
10.4.4 Mixing process 192
10.4.5 Expansion of application scope 192
10.5 Conclusions 192
References 194
Readership
This book should be useful for students, scientists, engineers and professionals working in the areas of optoelectronic packaging, photonic devices, semiconductor technology, materials science, polymer science, electrical and electronics engineering. This book could be used for one semester course on adhesives for photonics packaging designed for both undergraduate and graduate engineering students.
