RILEM Technical Committee 195-DTD Recommendation for Test Methods for AD and TD of Early Age Concrete
Round Robin Documentation Report: Program, Test Results and Statistical Evaluation
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Beschreibung
This report presents the Round-Robin (RR) program and test results including a statistical evaluation of the RILEM TC195-DTD committee named “Recommendation for test methods for autogenous deformation (AD) and thermal dilation (TD) of early age concrete”. The task of the committee was to investigate the linear test set-up for AD and TD measurements (Dilation Rigs) in the period from setting to the end of the hardening phase some weeks after. These are the stress-inducing deformations in a hardening concrete structure subjected to restraint conditions.
The main task was to carry out an RR program on testing of AD of one concrete at 20 °C isothermal conditions in Dilation Rigs. The concrete part materials were distributed to 10 laboratories (Canada, Denmark, France, Germany, Japan, The Netherlands, Norway, Sweden and USA), and in total 30 tests on AD were carried out. Some supporting tests were also performed, as well as a smaller RR on cement paste. The committee has worked out a test procedure recommendation which is reported separately and submitted acceptance as a RILEM method.
This report presents the Round-Robin (RR) program and test results including a statistical evaluation of the RILEM TC195-DTD committee named “Recommendation for test methods for autogenous deformation (AD) and thermal dilation (TD) of early age concrete”. The task of the committee was to investigate the linear test set-up for AD and TD measurements (Dilation Rigs) in the period from setting to the end of the hardening phase some weeks after. These are the stress-inducing deformations in a hardening concrete structure subjected to restraint conditions.
The main task was to carry out an RR program on testing of AD of one concrete at 20 °C isothermal conditions in Dilation Rigs. The concrete part materials were distributed to 10 laboratories (Canada, Denmark, France, Germany, Japan, The Netherlands, Norway, Sweden and USA), and in total 30 tests on AD were carried out. Some supporting tests were also performed, as well as a smaller RR on cement paste. The committee has worked out a test procedure recommendation which is reported separately and submitted acceptance as a RILEM method.
Prepares the reader for design of test rigs for measuring autogenous shrinkage of concrete, as well as reliable execution of testing autogenous shrinkage Uncovers the pitfalls in preparing a Round Robin program on concrete Includes an overview of test rigs for measuring of autogenous shrinkage of concrete Includes supplementary material: sn.pub/extras
Autor*in
Øyvind Bjøntegaard
Themen in »RILEM Technical Committee 195-DTD Recommendation for Test Methods for AD and TD of Early Age Concrete«
Autogenous Deformation Autogenous Shrinkage Early Age Concrete RILEM Method Stress-inducing Deformations Thermal Dilation