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Time-Dependent Material Properties of Shotcrete: Experimental and Numerical Study

1
Unit for Strength of Materials and Structural Analysis, Institute of Basic Sciences in Engineering Sciences, University of Innsbruck, Technikerstr 13, A-6020 Innsbruck, Austria
2
Brenner Basetunnel BBT SE, A-6020 Innsbruck, Austria
*
Author to whom correspondence should be addressed.
Materials 2017, 10(9), 1067; https://doi.org/10.3390/ma10091067
Received: 1 August 2017 / Revised: 30 August 2017 / Accepted: 8 September 2017 / Published: 11 September 2017
A new experimental program, focusing on the evolution of the Young’s modulus, uniaxial compressive strength, shrinkage and creep of shotcrete is presented. The laboratory tests are, starting at very young ages of the material, conducted on two different types of specimens sampled at the site of the Brenner Basetunnel. The experimental results are evaluated and compared to other experiments from the literature. In addition, three advanced constitutive models for shotcrete, i.e., the model by Meschke, the model by Schädlich and Schweiger, and the model by Neuner et al., are validated on the basis of the test data, and the capabilities of the models to represent the observed shotcrete behavior are assessed. Hence, the gap between the the outdated experimental data on shotcrete available in the literature on the one hand and the nowadays available advanced shotcrete models, on the other hand, is closed. View Full-Text
Keywords: shotcrete; sprayed concrete; material tests; constitutive model; creep; shrinkage; damage model; plasticity model shotcrete; sprayed concrete; material tests; constitutive model; creep; shrinkage; damage model; plasticity model
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Neuner, M.; Cordes, T.; Drexel, M.; Hofstetter, G. Time-Dependent Material Properties of Shotcrete: Experimental and Numerical Study. Materials 2017, 10, 1067.

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