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A platform for research: civil engineering, architecture and urbanism
Influence of autogenous shrinkage on early age behaviour of structural elements consisting of concretes of different ages
Abstract In structural elements consisting of concretes of different ages, physical and chemical deformations induced by heat release and autogenous shrinkage during the hydration of new concrete are restrained by the old concrete. Depending on the amplitude of these deformations and on the degree of restraint of the hybrid element, full-depth cracks can be induced in the new concrete layer at an early age. An experimental investigation on four hybrid elements was conducted to study this early age behaviour. The temperature evalution and global strains (measured using optical fiber sensors) during hydration are presented. Comparison of the experimental results with a numerical model shows that autogenous shrinkage has the most important influence on the evolution of the strains and internal stresses in the tested hybrid elements at early age.
Influence of autogenous shrinkage on early age behaviour of structural elements consisting of concretes of different ages
Abstract In structural elements consisting of concretes of different ages, physical and chemical deformations induced by heat release and autogenous shrinkage during the hydration of new concrete are restrained by the old concrete. Depending on the amplitude of these deformations and on the degree of restraint of the hybrid element, full-depth cracks can be induced in the new concrete layer at an early age. An experimental investigation on four hybrid elements was conducted to study this early age behaviour. The temperature evalution and global strains (measured using optical fiber sensors) during hydration are presented. Comparison of the experimental results with a numerical model shows that autogenous shrinkage has the most important influence on the evolution of the strains and internal stresses in the tested hybrid elements at early age.
Influence of autogenous shrinkage on early age behaviour of structural elements consisting of concretes of different ages
Bernard, O. (author) / Brühwiler, E. (author)
2002
Article (Journal)
English
| British Library Online Contents | 2002
Autogenous shrinkage at very early ages
| British Library Conference Proceedings | 1999