Cemented paste backfill : thickening, transport and mechanical properties /
This comprehensive book explores the technology and application of Cemented Paste Backfill (CPB), focusing on its thickening, transport, and mechanical properties. Authored by experts from the School of Civil and Resources Engineering at the University of Science and Technology Beijing, the book pro...
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| Médium: | Elektronický zdroj E-kniha |
| Jazyk: | angličtina |
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Amsterdam :
Elsevier,
2024.
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| On-line přístup: | ScienceDirect |
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Obsah:
- Front Cover
- Cemented Paste Backfill : Thickening, Transport and Mechanical Properties
- Cemented Paste Backfill : Thickening, Transport and Mechanical Properties
- Copyright
- Contents
- About the authors
- Foreword
- About this book
- 1
- Introducing cemented paste backfill (CPB) technology
- 1.1 Benefits and development of CPB technology
- 1.1.1 Benefits of CPB
- 1.1.2 Developments of CPB technology
- 1.2 Workflow and basic concepts of CPB process
- 1.2.1 Workflow of CPB
- 1.2.2 Basic concepts of CPB
- 1.3 Scope of the book
- References
- 2
- Definition of cemented paste backfill
- 2.1 Definition of CPB from the perspective of saturation rate and bleeding rate
- 2.1.1 CPB saturation rate
- 2.1.2 CPB bleeding rate
- 2.1.2.1 Definition of bleeding rate
- 2.1.2.2 Discussion on the thickness of lubrication layer
- 2.1.2.3 Relationship between saturation rate and bleeding rate
- 2.1.3 Verification of the CPB definition in Huize lead-zinc mine case
- 2.1.3.1 Calculation of the CPB concentration
- 2.1.3.2 Field measurement of bleeding rate
- 2.2 Improving the definition of CPB from the perspective of yield stress
- 2.2.1 Experimental equipment and methods
- 2.2.2 Definition of CPB from yield stress
- 2.2.2.1 Bingham model regression
- 2.2.2.2 Mathematical model of yield stress
- 2.2.2.3 Discussion on applied CPB concentration and the critical concentration
- 2.2.3 Paste definition validation
- 2.3 Detailed CPB definition through CPB properties
- References
- 3
- Theory, experiment, and equipment in tailings thickening process
- 3.1 Trends and challenges in tailings thickening
- 3.1.1 Research on tailings thickening
- 3.1.2 Research progress and direction
- 3.1.2.1 Flocculation kinetics model of tailings
- 3.1.2.2 Factors affecting floc settlement and model.
- 4.3.2 Uniform design of the yield stress test
- 4.3.3 Evolution of shear stress-shear rate curve and Herschel-Bulkley yield stress regression
- 4.3.4 Effect of solid components on yield stress of CPB
- 4.3.5 Analysis of influence mechanism of solid components on yield stress of paste
- 4.4 Estimating the CPB pipeline pressure drop through semiindustrial L-shape pipe flow test
- 4.4.1 Introduction
- 4.4.2 Engineering background and methodology
- 4.4.2.1 Engineering background
- 4.4.2.2 Simple tests of slump, bleeding, and customized L-shape pipe flow
- 4.4.2.3 Test scheme
- 4.4.3 Field test and results
- 4.4.4 Analysis and discussion
- 4.4.4.1 Slump and bleeding
- 4.4.4.2 Yield stress and viscosity
- 4.4.4.3 Comparison and prediction
- 4.4.5 Industrial test verification
- 4.4.6 Conclusion
- 4.5 Quantitative evaluating CPB pipeline wear resistance
- 4.5.1 Materials and preparation of the test
- 4.5.1.1 Wear test block production
- 4.5.1.2 Physical and chemical properties test of tailings (Lead Tongshan)
- 4.5.1.3 Preparation of filling slurry
- 4.5.2 In-door pipeline loop flow wear test
- 4.5.2.1 Device
- 4.5.2.2 Test procedures
- 4.5.2.3 Wear test results
- 4.5.3 Wear characteristics under different slurry conditions
- 4.5.3.1 Effect of cement-to-tailings ratio on wear of test block
- 4.5.3.2 Effect of mass concentration on wear of test block
- 4.5.3.3 Effect of slurry flow rate on the wear of the test block
- 4.5.4 Pipeline wear mathematical model
- 4.5.4.1 Mathematical model of mass concentration and wear rate
- 4.5.4.2 Mathematical model of slurry flow rate and wear rate
- 4.5.5 The mechanism of the solid particles
- 4.6 Quantitative test and engineering application of wear resistance
- 4.6.1 Pipeline wear resistance test device and methods
- 4.6.2 Results of the wear test.
- 4.6.3 Engineering application verification
- References
- 5
- Mechanical properties of hardening cemented paste backfill (CPB)
- 5.1 Hardened CPB mechanical property and its influencing factors
- 5.2 Effect of mixing proportion on CPB mechanical properties
- 5.2.1 Materials and method
- 5.2.1.1 Materials
- 5.2.1.2 Mixing proportion
- 5.2.1.3 Uniaxial compression strength tests
- 5.2.2 Strength versus binder content
- 5.2.3 Strength versus solid mass concentration
- 5.2.4 Strength versus coarse/fine tailings ratio
- 5.3 Effect of binder type and water chemistry on CPB properties
- 5.3.1 Testing materials and methods
- 5.3.1.1 Tailings and granulated slags
- 5.3.1.2 Cements
- 5.3.1.3 Mixing water
- 5.3.1.4 Mixing procedures
- 5.3.1.5 Slump measurements
- 5.3.1.6 Coagulation property tests
- 5.3.1.7 UCS tests
- 5.3.1.8 Microstructural analysis
- 5.3.2 Effects of cement type and water quality on paste slump performance
- 5.3.3 Effects of cement type and water quality on paste coagulation performance
- 5.3.4 Effects of cement type and water quality on paste UCS performance
- 5.4 Effects of initial temperature on CPB deformation behavior
- 5.4.1 Experiments and apparatus
- 5.4.1.1 CPB materials
- 5.4.1.2 Specimen preparation, mix proportions, and curing
- 5.4.1.3 Mechanical tests of specimens
- 5.4.2 Effect of initial temperature on the stress-strain behavior of CPB
- 5.4.3 Effect of initial temperature on the modulus of elasticity E of CPB
- 5.4.4 Relationship between the strength and modulus of elasticity of CPB
- 5.4.5 Evolution of the modulus of elasticity with hydration degree of the binder
- 5.4.6 Conclusions
- 5.5 Effect of curing humidity on the mechanical properties of CPB
- 5.5.1 Materials and methods
- 5.5.2 Effect of curing humidity on the deformation characteristics of CPB.