Static Mechanical Properties of UHPCC 1
1.1 Introduction . 1
1.2 Test Program 2
1.2.1 Raw Materials and Mixture Proportions . 2
1.2.2 Specimen Preparation and Curing 4
1.3 Instrumentation and Loading Scheme . 5
1.3.1 Cubic Compressive Test . 5
1.3.2 Axial Compressive Test 6
1.3.3 Direct Tensile Test 7
1.3.4 FourPoint Flexural Test . 8
1.3.5 ThreePoint Flexural Test 9
1.4 Test Results and Discussion 10
1.4.1 Compression Test 10
1.4.2 Direct Tension Test . 14
1.4.3 FourPoint Flexure Test 17
1.4.4 ThreePoint Flexure Test . 21
1.5 Summary . 27
References 28
2 Dynamic Compressive Mechanical Properties of UHPCC . 31
2.1 Introduction . 31
2.2 Specimen Preparation 32
2.3 SHPB Test 33
2.3.1 Test Device . 33
2.3.2 Test Technique 34
2.4 Test Results and Discussions . 37
2.4.1 Stress Equilibrium 37
2.4.2 Strain Rate Determination 38
2.4.3 Dynamic Failure Pattern . 39
2.4.4 Dynamic Stress–Strain Curve . 40
2.4.5 Dynamic Increase Factor . 44
2.4.6 Energy Absorption Capacity 48
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x Contents
2.5 ViscoElastic Damage Model 49
2.5.1 Nonlinear ViscoElastic Model 49
2.5.2 Model Calibration and Validation 51
2.6 Summary . 51
References 53
3 Dynamic Tensile Mechanical Properties of UHPCC 55
3.1 Introduction . 55
3.2 Specimen Preparation 56
3.3 Dynamic Spalling Test . 57
3.3.1 Test Device . 57
3.3.2 Test Technique 58
3.4 Test Results and Discussions . 61
3.4.1 Dynamic Failure Patterns 61
3.4.2 Dynamic Spalling Strength . 63
3.4.3 Relations Between the Critical Time to Fracture
and Dynamic Spalling Strength 66
3.4.4 Dynamic Increase Factor . 67
3.5 Summary . 70
References 71
4 Triaxial Compressive Behavior of UHPCC and Application
in the Numerical Analyses of Projectile Impact 73
4.1 Introduction . 73
4.2 A Review of the Existing Works on Triaxial Behavior
of Concrete 74
4.3 Mixing Optimization of UHPCC and Triaxial Compression
Test 76
4.3.1 Compositions . 76
4.3.2 Mixing Procedure 78
4.3.3 Triaxial Compression Test . 79
4.4 Results and Analysis . 80
4.4.1 Failure Pattern . 80
4.4.2 Stress–Strain Curve . 81
4.4.3 Failure Criteria 85
4.4.4 Toughness 90
4.5 Applications in the Numerical Analyses 92
4.5.1 Brief Introduction of HJC Constitutive Model . 92
4.5.2 HJC Model Parameters for HSC . 94
4.5.3 Validations 95
4.6 Summary . 98
References 101
Contents xi
5 Projectile Penetrations into Coarse Aggregated UHPCC
Targets 105
5.1 Introduction . 105
5.2 Basalt Aggregated UHPCC Target 108
5.2.1 Target 108
5.2.2 Projectile . 109
5.2.3 Test Setup 113
5.2.4 Test Results . 114
5.2.5 Discussions . 116
5.3 Corundum Aggregated UHPCC Target 121
5.3.1 Target and Projectile 121
5.3.2 Test Results . 122
5.3.3 Discussions . 127
5.4 Numerical Simulations Based on 3D Mesoscopic Concrete
Model 138
5.4.1 3D Mesoscopic Concrete Model . 138
5.4.2 Validations 148
5.4.3 Impact Resistance of Different Aggregated UHPC . 153
5.5 Summary . 158
References 161
6 Impact Resistance of Basalt Aggregated UHPSFRC/Fabric ......
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