Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Creep and shrinkage of self-compacting concrete
Due to its advantages during placing, self-compacting concrete (SCC) seems to be a very promising material for concrete construction. At this moment however, not much information is available concerning the fundamental background of the properties of the SCC. At the Magnel Laboratory for Concrete Research, an extended research programme is going on in order to more fundamentally understand the behaviour of this material. This research project includes the study of the fresh, hardening and hardened SCC, with due attention given to the time-dependent mechanical behaviour. In this contribution, results are reported concerning the creep and shrinkage of SCC. The measurements are carried out on sealed and unsealed specimens in order to be able to extract basic and drying creep and shrinkage. Different mix compositions are considered, studying different parameters, like cement type, filler type, c/p (cement to powder ratio). After evaluation of the findings of the test series as described, the following conclusions can be formulated. With increasing c/p ratio and consequently increasing cement content and decreasing w/c ratio, a decrease of the creep deformations is found. The fineness of the tested fillers has almost no influence on the deformations. Comparison of the experimental results with some traditional models shows that the ACI-model results into a reasonable accurate prediction while the models suggested by de Larrard and the Model Code result into an underestimation of deformations. Based on the available experimental results it can be stated that the magnitude of the deformations of the self-compacting concrete is comparable with the magnitude of the deformations of a traditional concrete. The influence of the different components and the mix compositions of the self-compacting concrete have to be studied more closely.
Creep and shrinkage of self-compacting concrete
Due to its advantages during placing, self-compacting concrete (SCC) seems to be a very promising material for concrete construction. At this moment however, not much information is available concerning the fundamental background of the properties of the SCC. At the Magnel Laboratory for Concrete Research, an extended research programme is going on in order to more fundamentally understand the behaviour of this material. This research project includes the study of the fresh, hardening and hardened SCC, with due attention given to the time-dependent mechanical behaviour. In this contribution, results are reported concerning the creep and shrinkage of SCC. The measurements are carried out on sealed and unsealed specimens in order to be able to extract basic and drying creep and shrinkage. Different mix compositions are considered, studying different parameters, like cement type, filler type, c/p (cement to powder ratio). After evaluation of the findings of the test series as described, the following conclusions can be formulated. With increasing c/p ratio and consequently increasing cement content and decreasing w/c ratio, a decrease of the creep deformations is found. The fineness of the tested fillers has almost no influence on the deformations. Comparison of the experimental results with some traditional models shows that the ACI-model results into a reasonable accurate prediction while the models suggested by de Larrard and the Model Code result into an underestimation of deformations. Based on the available experimental results it can be stated that the magnitude of the deformations of the self-compacting concrete is comparable with the magnitude of the deformations of a traditional concrete. The influence of the different components and the mix compositions of the self-compacting concrete have to be studied more closely.
Creep and shrinkage of self-compacting concrete
Poppe, Anne-Mieke (Autor:in) / De Schutter, Geert (Autor:in)
2005
8 Seiten, 10 Bilder, 1 Tabelle, 12 Quellen
Aufsatz (Konferenz)
Englisch
Creep and shrinkage of self-compacting concrete
| British Library Conference Proceedings | 2001
Creep and shrinkage of self-compacting concrete
| British Library Conference Proceedings | 2005
Shrinkage and Creep of Self-Compacting Concrete, SCC
| British Library Conference Proceedings | 1999
Creep, shrinkage and elastic modulus of self-compacting concrete
| British Library Conference Proceedings | 1999