Title:
Thermal Cracking in Concrete at Early Ages : Proceedings of the International Symposium held by RILEM (The International Union of Testing and Research Laboratories for Materials and Structures)
Series:
RILEM proceedings ; volume 25
Physical Description:
xv, 470 pages : illustrations ; 25 cm
ISBN:
9780367449308
General Note:
Proceedings of the International Symposium held by RILEM (The International Union of Testing and Research Laboratories for Materials and Structures) at the Technical University of Munich and organized by RILEM Technical Committe 119 and the Institute of Building Materials of the Technical University of Munich, Germany. The Simposium is supported by the Japan Concrete Institute (JCI), The German Concrete Association (DBV), the Association of the Bavarian Building Industry (BBIV), and the American Concrete Institute (ACI)
Abstract:
Thermal Cracking in Conrete at Early Ages contains 56 contributions by leading international specialists presented at the RILEM Symposium held in October 1994 at the Technical University of Munich. It will be valuable for construction and site.
Added Author:
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Library | Item Barcode | Call Number | Material Type | Item Category 1 | Status |
|---|---|---|---|---|---|
Searching... | 30000010371605 | TA440 P763 2019 | Open Access Book | Book | Searching... |
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Summary
Summary
Restraint and intrinsic stresses in concrete at early ages are vitally important for concrete structures which must remain free of water-permeable cracks, such as water-retaining structures, tunnel linings, locks and dams. The development of hydration heat, stiffness and strength, also the degree of restraint and, especially for high-strength concrete, non-thermal effects, are decisive for sensitivity to cracking. Determining thses stresses in the laboratory and in construction components has led to a clearer understanding of how they develop and how to optimize mix design, temperature and curing conditions. New testing equipment has enabled the effects of all the important parameters to be qualified and more reliable models for predictiong restraint stresses to be developed.
Thermal Cracking in Conrete at Early Ages contains 56 contributions by leading international specialists presented at the RILEM Symposium held in October 1994 at the Technical University of Munich. It will be valuable for construction and site engineers, concrete technologists and scientists.
Author Notes
R. Springenschmid was Professor for construction materials at the esteemed Technical University Munich for 25 years from 1973 to 1998.
Table of Contents
| Preface | p. xi |
| Préface | p. xiii |
| Scientific Council | p. xvii |
| RILEM Technical Committee TC 119 TCE | p. xvii |
| Organising Committee | p. xviii |
| Part 1 Heat of Hydration | p. 1 |
| 1 Numerical and experimental adiabatic hydration curve determination | p. 3 |
| 2 Thermal and mechanical modelling of young concrete based on hydration process of multi-component cement minerals | p. 11 |
| Part 2 Prediction of Temperature Development | p. 19 |
| 3 Prediction of temperature distribution in hardening concrete | p. 21 |
| 4 Low-heat Portland cement used for silo foundation mat - temperatures and stresses measured and analyzed | p. 29 |
| 5 Modelling of heat and moisture transport in hardening concrete | p. 37 |
| 6 Modelling of temperature and moisture field in concrete to study early age movements as a basis for stress analysis | p. 45 |
| Influence of the geometry of hardening concrete elements on the early age thermal crack formation | p. 53 |
| Part 3 Determination and Modelling of Mechanical Properties | p. 61 |
| 8 Stiffness formation of early age concrete | p. 63 |
| 9 From microstructural development towards prediction of macro stresses in hardening concrete | p. 71 |
| 10 Effect of creep in concrete at early ages on thermal stress | p. 79 |
| 11 Basic creep and relaxation of young concrete | p. 87 |
| 12 Estimation of stress relaxation in concrete at early ages | p. 95 |
| 13 Stresses in concrete at early ages: comparison of different creep models | p. 103 |
| 14 Young concrete under high tensile stresses - creep, relaxation and cracking | p. 111 |
| 15 The thermal stress behaviour of concrete based on the micromechanical approach | p. 119 |
| 16 Numerical simulation of the effect of curing temperature on the maximum strength of cement-based materials | p. 127 |
| Part 4 Measurement of Thermal Stresses in the Laboratory | p. 135 |
| 17 Development of the cracking frame and the temperature-stress testing machine | p. 138 |
| 18 Investigation of concrete behaviour under restraint with a temperature-stress test machine | p. 145 |
| 19 Determination of restraint stresses and of material properties during hydration of concrete with the temperature-stress testing machine | p. 153 |
| 20 Material characterization of young concrete to predict thermal stresses | p. 161 |
| Part 5 Measurement of Thermal Stresses in SITU | p. 169 |
| 21 Thermal stress in full size RC box culvert | p. 171 |
| 22 Thermal cracking in wall of prestressed concrete egg-shaped digester | p. 179 |
| 23 Study of external restraint of mass concrete | p. 187 |
| Part 6 Influence of Constituents and Composition of Concrete on Cracking Sensitivity | p. 195 |
| 24 The effect of slag on thermal cracking in concrete | p. 197 |
| 25 Minimization of thermal cracking in concrete members at early ages | p. 205 |
| 26 The effect of thermal deformation, chemical shrinkage and swelling on restraint stresses in concrete at early ages | p. 213 |
| 27 Effect of autogenous shrinkage on self stress in hardening concrete | p. 221 |
| 28 High performance concrete: early volume change and cracking tendency | p. 229 |
| 29 Factors influencing early cracking of high strength concrete | p. 237 |
| Part 7 Computational Assessment of Stresses and Cracking | p. 245 |
| 30 Experience in controlled concrete behaviour | p. 247 |
| 31 Numerical simulation of crack-avoiding measures | p. 255 |
| 32 Thermal prestress of concrete by surface cooling | p. 265 |
| 33 Defining and application of stress-analysis-based temperature difference limits to prevent early-age cracking in concrete structures | p. 273 |
| 34 Numerical simulation of temperatures and stresses in concrete at early ages: the French experience | p. 281 |
| 35 A practical planning tool for the simulation of thermal stresses and for the prediction of early thermal cracks in massive concrete structures | p. 289 |
| 36 Prediction of temperature and stress development in concrete structures | p. 297 |
| 37 Sensitivity analysis and reliability evaluation of thermal cracking in mass concrete | p. 305 |
| 38 Deformations and thermal stresses of concrete beams constructed in two stages | p. 313 |
| 39 Thermal stresses computed by a method for manual calculations | p. 321 |
| 40 Thermal effects, cracking and damage in young massive concrete | p. 329 |
| 41 Temperature field and concrete stresses in a foundation plate | p. 337 |
| Part 8 Practical Measures for Avoidance of Cracking - Case Records | p. 345 |
| 42 Report on construction of water-impermeable concrete structures with high-level ground-water ("Weisse wannen" - "White troughs") in Bavaria | p. 347 |
| 43 On the reliability of temperature differentials as a criterion for the risk of early-age thermal cracking | p. 353 |
| 44 Why are temperature-related criteria so unreliable for predicting thermal cracking at early ages? | p. 361 |
| 45 Inherent thermal stress distributions in concrete structures and method for their control | p. 369 |
| 46 Practical experience with concrete technological measures to avoid cracking | p. 377 |
| 47 Risk of cracking in massive concrete structures - new developments and experiences | p. 385 |
| 48 Thermal cracking in the diaphragm-wall concrete of Kawasaki Island | p. 393 |
| 49 Measures to avoid temperature cracks in concrete for a bridge deck | p. 401 |
| 50 Avoidance of early age thermal cracking in concrete structures - predesign, measures, follow-up | p. 409 |
| 51 Water-tight design, artificial cooling or extra reinforcement | p. 417 |
| 52 A large beam cooled with water shower to prevent cracking | p. 425 |
| 53 Reduction of thermal stresses in structures with air-cooling | p. 433 |
| 54 Countermeasure for thermal cracking of box culvert | p. 441 |
| 55 High performance concrete: field observations of cracking tendency at early age | p. 449 |
| 56 Establishment of a new crack prevention method for dams by RCD method | p. 457 |
| Author index | p. 465 |
| Subject index | p. 467 |
