Transport processes in concrete:
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
London [u.a.]
Spon
2002
|
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XII, 547 S. graph. Darst. |
| ISBN: | 0415242649 |
Internformat
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| 245 | 1 | 0 | |a Transport processes in concrete |c Robert Cerny and Pavla Rovnaníková |
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Datensatz im Suchindex
| _version_ | 1804138980845813760 |
|---|---|
| adam_text | Titel: Transport processes in concrete
Autor: Cerny, Robert
Jahr: 2002
Contents
Preface xi
1 Physical and chemical processes in concrete 1
1.1 The composition of Portland cement 1
1.2 Hydration processes of cement 6
1.3 Hydration heat 11
1.4 Properties of aggregates 15
1.4.1 Natural aggregates 17
1.4.2 Aggregates made of secondary raw materials 20
1.4.3 Other components 21
1.5 Structure of concrete 24
1.5.1 Basic structure 24
1.5.2 Models of the porous structure 26
1.6 Basic physical transport mechanisms 31
1.6.1 The continuum approach to porous media 31
1.6.2 Coupled water vapour and water transport in the
porous system 33
1.6.2.1 Water vapour transport and Knudsen diffusion 33
1.6.2.2 Transport of the surface phase of water 39
1.6.2.3 Liquid water transport 40
1.6.2.4 Phase change processes in the porous system 41
1.6.2.5 Sorption isotherms 43
1.6.3 Salt transport 45
1.6.4 Gas transport 46
1.7 Interaction of chemical compounds with the solid matrix 47
1.7.1 Interaction with the cement binder 47
1.7.1.1 Water 49
1.7.1.2 Acids and hydroxides 54
1.7.1.3 Salt solutions 57
1.7.1.4 Gases 62
1.7.2 Interaction with aggregates 69
References 72
2 Fundamentals of transport phenomena in chemically reacting
mixtures 77
2.1 Basic concepts of continuum mechanics 77
2.1.1 Coordinates and configuration 78
2.1.2 Motion and deformation 79
VI
Transport Processes in Concrete
83
91
94
95
2.1.3 Kinematics of a continuous medium
2.1.4 Forces and stress
2.1.5 Work and power
2.2 Balance laws for a single continuum containing moving
discontinuities
2.2.1 Mass balance and the continuity equation 99
2.2.2 Momentum principles and equations of motion 100
2.2.3 Energy balance 104
2.2.4 Entropy inequality 199
2.3 Constitutive equations for a single continuum 109
2.3.1 Basic concepts HO
2.3.2 Construction of equations of state and phenomenological
equations HO
2.3.3 Examples of constitutive equations 119
2.3.3.1 Heat conduction in a one-component rigid material 120
2.3.3.2 Elastic material in isothermal conditions 120
2.3.3.3 Viscoelastic material in isothermal conditions 122
2.3.3.4 Plastic material in isothermal conditions 124
2.4 Balance laws for a linear chemically reacting mixture
with discontinuities 127
2.4.1 Fundamentals of the linear theory of mixtures 127
2.4.2 Mass balance 128
2.4.3 Momentum balances 130
2.4.4 Energy balance 136
2.4.5 Entropy inequality 145
2.5 Constitutive equations for a linear mixture 147
References 152
3 Models of heat, moisture and chemical compounds transport
in porous materials 155
3.1 Models of water and water vapour transport 155
3.1.1 Convection models 155
3.1.2 Diffusion models 159
3.1.2.1 Diffusion models with sharp or steep interface 166
3.1.3 Hybrid models 170
3.2 Coupled heat and moisture transport 172
3.2.1 Elementary thermodynamic model 173
3.2.2 Convection models Igl
3.2.3 Diffusion models 190
3.2.4 Hybrid models 201
3.2.5 Heat and moisture transport across the interfaces 205
3.3 Transport of chemical compounds 208
3.4 Complex models 91o
3.4.1 Coupled heat, moisture and chemical compounds transport 213
3.4.2 Hygro-thermo-mechanical models 241
Contents
vii
3.4.3 Transport processes at high temperatures 249
References 259
4 Modelling transport processes in concrete 263
4.1 Commonly employed models 263
4.2 Applicability limits of general models of transport phenomena
in porous materials 282
4.3 Recommended model of transport processes in concrete
in usual service conditions 290
4.4 Recommended model for concrete in severe conditions 312
4.5 Requirements to the material parameters employed in the models 313
References 315
5 Experimental methods for determination of field variables
and of material properties of concrete 321
5.1 Field variables of heat, moisture and chemical compounds
transport 321
5.1.1 Moisture content 321
5.1.1.1 Gravimetric method 323
5.1.1.2 Resistance methods 327
5.1.1.3 Dielectric methods 328
5.1.1.4 Radiometric methods 337
5.1.1.5 The nuclear magnetic resonance method 341
5.1.1.6 Infrared spectroscopy method 346
5.1.1.7 Chemical methods 347
5.1.1.8 Ultrasonic methods 349
5.1.1.9 Azeotropic distillation method 349
5.1.1.10 Extraction method 349
5.1.2 Relative humidity 349
5.1.2.1 Psychrometric method 351
5.1.2.2 Dew point measurement method 353
5.1.2.3 Equilibrium electrolytic moisture meter 355
5.1.2.4 Coulometric method 356
5.1.2.5 Sorption methods 356
5.1.2.6 Spectral methods 358
5.1.3 Temperature 359
5.1.3.1 Contact dilatation thermometers 362
5.1.3.2 Electric thermometers 364
5.1.3.3 Pyrometers 368
5.1.4 Capillary pressure 371
5.1.5 Salts and other chemical compounds content 373
5.1.5.1 Qualitative methods used on a construction 374
5.1.5.2 Sampling and sample preparation for analysis 374
5.1.5.3 Determination of pH and salts content 376
Mil
Transport Processes in Concrete
5.1.5.4 Nondestructive determination of salts content 379
5.2 Pore distribution
5.3 Ilygric properties 3
5.3.1 Moisture storage characteristics 4S4
5.3.1.1 Sorption isotherms 384
5.3.1.2 Water retention curves 385
5.3.2 Moisture transport parameters 388
5.3.2.1 Water vapour permeability 390
5.3.2.2 Water sorptivity 395
5.3.2.3 Moisture diffusivity 396
5.3.2.4 Hydraulic conductivity 400
5.3.2.5 Water permeability 401
5.3.3 Simultaneous determination of moisture storage
and moisture transport parameters 402
5.3.4 Hygric expansion coefficients 405
5.4 Thermal properties 407
5.4.1 Hydration heat 407
5.4.2 Specific heat capacity 412
5.4.2.1 Mixing methods 413
5.4.2.2 Relative methods 414
5.4.2.3 Adiabatic heating methods 416
5.4.2.4 Nonadiabatic method for high-temperature
applications 416
5.4.3 Thermal diffusivity 419
5.4.3.1 Transient sourceless methods 422
5.4.3.2 Point pulse source methods 424
5.4.3.3 Continuous point source methods 424
5.4.3.4 Line source methods 426
5.4.3.5 Planar source methods 426
5.4.3.6 Volume and combined source methods 427
5.4.4 Thermal conductivity 428
5.4.4.1 Steady-state methods 428
5.4.4.2 Transient methods 429
5.4.4.3 Indirect methods 431
5.4.4.4 Solution of inverse problems with temperature
dependent thermal conductivity 431
5.4.5 Thermal expansion coefficients 441
5.5 Other parameters 444
5.5.1 Gas permeability 444
5.5.2 Ion binding isotherms 445
5.5.3 Salt diffusion coefficient 447
References iCn
Contents
ix
6 Examples of practical applications of computational models
of heat, moisture and salt transport in the design of concrete
structures 461
6.1 Building physics related assessment of the envelope 461
6.2 Hydration heat related problems in large-scale concrete structures 475
6.2.1 Mathematical model 476
6.2.1.1 Temperature fields 476
6.2.1.2 Moisture fields 477
6.2.1.3 Hygrothermal stress fields 477
6.2.2 Computational results 479
6.3 Concrete in high temperature conditions 481
6.4 Salt transport induced embedded steel corrosion 486
6.5 Service life prediction models 491
6.5.1 Approaches for predicting the service life of concrete 491
6.5.2 Recommendations for the improved service life analyses from
the point of view of transport phenomena 496
References 500
Appendix 1 Basic mathematical relations 503
A 1.1 Coordinate transformations 503
A1.2 Tensors and their basic properties 504
A1.3 Vector and tensor operations 506
A1.4 Integral relationships 509
Appendix 2 Recommended data for material parameters of
concrete 511
A2.1 Density and bulk density 513
A2.2 Hydration heat of clinker minerals and cements 514
A2.3 Thermal conductivity 516
A2.4 Specific heat capacity 520
A2.5 Water permeability, hydraulic conductivity
and moisture diffusivity 523
A2.6 Gas permeability, gas diffusion coefficient,
water vapour permeability,
water vapour diffusion resistance factor 528
A2.7 Sorption isotherms and water retention curves 530
A2.8 Salt diffusion coefficients 532
A2.9 Ion binding isotherms 534
References 535
Subject index
541
|
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| spelling | Cerny, Robert Verfasser aut Transport processes in concrete Robert Cerny and Pavla Rovnaníková London [u.a.] Spon 2002 XII, 547 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Transportprozess (DE-588)4185932-7 gnd rswk-swf Physikalisch-chemische Eigenschaft (DE-588)4369521-8 gnd rswk-swf Bauphysik (DE-588)4004910-3 gnd rswk-swf Beton (DE-588)4006111-5 gnd rswk-swf Beton (DE-588)4006111-5 s Physikalisch-chemische Eigenschaft (DE-588)4369521-8 s Bauphysik (DE-588)4004910-3 s Transportprozess (DE-588)4185932-7 s DE-604 Rovnaníková, Pavla Verfasser aut HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=017429919&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Cerny, Robert Rovnaníková, Pavla Transport processes in concrete Transportprozess (DE-588)4185932-7 gnd Physikalisch-chemische Eigenschaft (DE-588)4369521-8 gnd Bauphysik (DE-588)4004910-3 gnd Beton (DE-588)4006111-5 gnd |
| subject_GND | (DE-588)4185932-7 (DE-588)4369521-8 (DE-588)4004910-3 (DE-588)4006111-5 |
| title | Transport processes in concrete |
| title_auth | Transport processes in concrete |
| title_exact_search | Transport processes in concrete |
| title_full | Transport processes in concrete Robert Cerny and Pavla Rovnaníková |
| title_fullStr | Transport processes in concrete Robert Cerny and Pavla Rovnaníková |
| title_full_unstemmed | Transport processes in concrete Robert Cerny and Pavla Rovnaníková |
| title_short | Transport processes in concrete |
| title_sort | transport processes in concrete |
| topic | Transportprozess (DE-588)4185932-7 gnd Physikalisch-chemische Eigenschaft (DE-588)4369521-8 gnd Bauphysik (DE-588)4004910-3 gnd Beton (DE-588)4006111-5 gnd |
| topic_facet | Transportprozess Physikalisch-chemische Eigenschaft Bauphysik Beton |
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