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Summary
Summary
Creep, shrinkage and durability of concrete and concrete structures have been a traditional conference topic for almost fifty years.
This volume contains contributions from presentations at CONCREEP - 7, held September 12th - September 14th, 2005 at Ecole Centrale de Nantes, France.
These papers cover the latest results and implementation strategies of creep, shrinkage and durability mechanics research at the interface of solid mechanics, materials science, experimental mechanics, and computational mechanics of concrete-like materials, and the related structural engineering problems.
Author Notes
Gilles Pijaudier-Cabot is a Professor at Ecole Centrale de Nantes, France.
Bruno Gérard is a researcher at OXAND, France.
Paul Acker is a researcher at Lafarge, France.
Table of Contents
Forewords | p. 15 |
Chapter 1 Creep Mechanisms and Creep-Fracture Interaction | p. 17 |
Nanostructure of C-S-H gel in cement paste as a function of curing conditions and relative humidity | p. 19 |
Investigation on creep mechanisms of hardened cement paste by means of the small angle X-ray scaterring method | p. 39 |
Is the behaviour of the concrete viscolelastic linear? | p. 45 |
Creep monitoring in concrete structures by the acoustic emission technique | p. 51 |
Rate dependent fracture on notched plain concrete beams | p. 57 |
Bending basic creep experiments: influence on fracture characteristics | p. 63 |
Stability analysis of creep failure in concrete | p. 69 |
Chapter 2 Modelling of Creep and Shrinkage | p. 75 |
Modelling of concrete as a multiphase viscious porous material | p. 77 |
A proposed method for determining the drying kinetics in concrete | p. 83 |
Drying shrinkage as a viscoelastic response due to internal pressures | p. 89 |
The influence of specific surface area of coarse aggregate on drying shrinkage of concrete | p. 95 |
Microcracking of mortars during drying: effects on delayed behaviours | p. 101 |
Mesomechanical modeling of drying shrinkage using interface elements | p. 107 |
Upscalling techniques for modeling the basic creep of cement paste | p. 113 |
Influence of capilarry effects on strenght of non saturated porous media | p. 119 |
Interface crack propagation in viscoelastic discrete model | p. 125 |
Nonlinear, incremental structural analysis for the design and construction of massive concrete structures | p. 131 |
Chapter 3 Multiphase and Multiscale Approaches to Shrinkage | p. 137 |
Colloidal mechanisms of hygral volume change of hardened cement paste | p. 139 |
Time dependent structural analysis considering mass transfer | p. 151 |
Fracture of cement-based materials under hygral-mechanical loading | p. 163 |
A poro-mechanical modeling approach for concrete autogeneous shrinkage | p. 169 |
The coupling effect of drying shrinkage and moisure diffusion in concrete | p. 175 |
Plastic damage modelling of concrete subjected to desiccation | p. 181 |
Chapter 4 Durability | p. 187 |
A probabilistic approach to the long term durability of concrete structures | p. 189 |
Chemical and mechanical description of leached concrete: Experimental results and theoretical modelling | p. 195 |
Leached concrete compressive creep | p. 201 |
Expansion of hardened cement paste in saline solutions | p. 207 |
Measuring permeability and bulk modulus of cementitious materials | p. 213 |
Effect of localized cracking on chloride diffusivity and gas permeability in concrete. Experimental study | p. 219 |
Modeling for fixation of chloride ions in pore solution | p. 225 |
A micromechanical approach to ASR-induced damage in concrete | p. 231 |
Influence of basic creep on the modelling of structures subjected to alkali aggregate reaction | p. 237 |
Fracture properties in mortars exposed to alkali-silica reaction | p. 243 |
Chapter 5 Creep and shrinkage in Structures | p. 249 |
Influence of ambient conditions on concrete shrinkage | p. 251 |
Early performance of structural concrete slabs treated with a hydrophobic admixture | p. 257 |
Time-dependent behaviour of reinforced recycled concrete beams | p. 263 |
Creep in compression of concrete core taken in a real structure - analysis of two years of measures and extrapolation | p. 269 |
Time dependent behaviour of precast prestressed slabs with in-situ concrete topping | p. 275 |
Effect of differential moisture distribution on SRC column shortening | p. 281 |
Accounting for concrete shrinkage in the mechanistic empirical pavement design procedure | p. 287 |
Why is the initial trend of deflections of box girder bridges deceptive? | p. 293 |
Creep, shrinkage and durability effects in concrete girders components of bridges structures | p. 299 |
Long-term behaviour of a steel-concrete composite railway bridge deck | p. 305 |
Stress loss in prestressed concrete with PFBC coal ash | p. 311 |
Concrete delayed deformations of nuclear structures - Comparison between monitoring analysis and theoretical values | p. 317 |
Reliability based approach to predict long time behaviour of prestressed concrete containment vessel | p. 323 |
Creep analysis of NPP containment | p. 329 |
Impacts of the mechanical constitutive law on the hydraulic behaviour of a containment building | p. 335 |
An engineering approach for modelling the deteriorating effects of alkali aggregate reaction in concrete structures | p. 341 |
Numerical model for simulation of aging mechanisms of nuclear containment structures | p. 347 |
Analysis of the delayed behaviour of NPP containment building | p. 353 |
Chapter 6 Early Age Creep and Shrinkage: Experiments and Modelling | p. 359 |
Multiscale model for early-age creep of cementitious materials | p. 361 |
Compressive and tensile creep of young concrete with mineral additives | p. 369 |
Linear logarithmic creep model | p. 375 |
Effect of basic creep on the early-age behaviour of concrete | p. 381 |
Early age concrete creep. At high stress level | p. 387 |
Modelling of uni-axial constitutive law in early age concrete based on solidification concept | p. 393 |
A study on the method of estimating creep of early-age concrete | p. 399 |
Study of early age shrinkage, hydraulic pressure and conductivity of cement paste | p. 405 |
Effect of stress relaxation on thermal stresses | p. 411 |
Viscoelastic behaviour of early age salt concrete used in a repository for radioactive waste in a rock salt mine | p. 417 |
Autogeneous shrinkage and hydration degree of cement pastes at very early age: Influence of superplasticizer | p. 423 |
Early-age analysis of a foundation slab: sensitivity to creep parameters | p. 429 |
Comparison between tensile and compressive creep of early age high performance concrete (HPC) | p. 435 |
Development of stress erasing test on concrete specimens | p. 441 |
Chapter 7 Temperature Effects | p. 447 |
Concrete creep at high temperature and its interaction with fracture: Recent progress | p. 449 |
Transient thermal strains of high performance concretes | p. 461 |
Multiaxial creep and damage under elevated temperature | p. 473 |
Concrete tunnel linings under fire loading | p. 479 |
The spalling of heated concrete: Comparison between thermal and hydraulic spalling | p. 491 |
Evolution of intrinsic permeability in concrete at high temperature | p. 497 |
Transient thermal creep of HPC at high temperatures under accidental conditions | p. 503 |
"Transient thermal creep" of concrete: Intrinsic behaviour or structural effect? | p. 509 |
A comparative study of two THC models or concrete subject to high temperatures | p. 515 |
Chapter 8 Self Compacting Concrete | p. 521 |
A comparison between long term properties of self compacting concretes and normal vibrated concretes with same strength | p. 523 |
Influence of paste volume on fracture behaviour of SCC | p. 529 |
Creep of self compacting concrete | p. 535 |
Creep and shrinkage of self-compacting concrete and comparative study with model code | p. 541 |
Long-term deflection of reinforced SCC beams | p. 547 |
Delayed behaviour of self-compacting concrete | p. 553 |
Influence of limestone filler on chemical shrinkage and hydration of cement pastes at early age | p. 559 |
Chapter 9 High Performance Concrete | p. 565 |
Effect of size on creep and shrinkage of concrete - five years measurements | p. 567 |
Shrinkage and shrinkage cracking of high performance fibre reinforced cement-based composites | p. 573 |
Internally-cured high-performance concrete under restrained shrinkage and creep | p. 579 |
Creep and shrinkage of high performance lightweight aggregate concrete | p. 585 |
Mechanical behaviour of ultra high preformance fibre reinforced concretes (UHPFRC) at early age, under restraint | p. 591 |
Shrinkage effect on shear behaviour of reinforced HSC beams | p. 597 |
Creep of ultra-high performance concrete (UHPC) | p. 603 |
Creep and shrinkage modelling of HPC | p. 609 |
Autogeneous shrinkage of CARDIFRC | p. 615 |
Creep and shrinkage for structures using dense concrete | p. 621 |
Temperature effect on shrinkage stress in expansive - ultra high strength concrete | p. 627 |
Actual state of research on autogeneous deformation and thermal dilatation at iBMB | p. 633 |
Index of authors | p. 639 |