Details
| Original language | English |
|---|---|
| Pages | 1792-1801 |
| Number of pages | 10 |
| Publication status | Published - Oct 2018 |
| Event | 5th fib Congress, FIB 2018 - Melbourne, Australia Duration: 7 Oct 2018 → 11 Oct 2018 |
Conference
| Conference | 5th fib Congress, FIB 2018 |
|---|---|
| Country/Territory | Australia |
| City | Melbourne |
| Period | 7 Oct 2018 → 11 Oct 2018 |
Abstract
High-strength grouts are commonly used in the wind energy industry, where they are exposed to high cyclic loading. However, so far, concerning the specific fatigue behaviour of these grouts, any research is hardly available. Latest scientific results (e.g. Elsmeier (2018)) show that there is a divergent fatigue behaviour of high-strength grout compared to high-strength concrete. Above this, there are still considerable uncertainties regarding the impact of composition parameters like the paste volume or the maximum grain size dG on the fatigue resistance of high-strength grout. In particular, the interfacial transition zone and a tighter pore system in combination with the moisture content of the specimen seem to have an influence on the fatigue behaviour of high-strength grout. In fatigue tests with cement paste, a higher number of load cycles and significantly higher temperatures were reached. During some tests, drops of condensing water could be observed on the cold pressure plates of the testing machine. This could be an indicator of water vapour pressure, which might have led to a premature failure. Furthermore, some correlations could be shown between the increase in temperature during testing and the influence of the loading frequency fP, the maximum grain size dG and the paste volume.
Keywords
- Fatigue behaviour, Heating-rate, High-strength grout, Loading frequency fP, Maximum grain size d, Warming of specimen, Maximum grain size dG
ASJC Scopus subject areas
- Engineering(all)
- Building and Construction
- Engineering(all)
- Civil and Structural Engineering
- Materials Science(all)
- Materials Science (miscellaneous)
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2018. 1792-1801 Paper presented at 5th fib Congress, FIB 2018, Melbourne, Australia.
Research output: Contribution to conference › Paper › Research › peer review
}
TY - CONF
T1 - Premature failure of high-strength grout in fatigue tests due to the warming of specimen during cyclic loading
AU - Otto, Corinne
AU - Lohaus, Ludger
AU - Cotardo, Dario
N1 - Funding Information: The research project is supported by the German Research Foundation (DFG).The authors would like to express their gratitude for the financial support. Publisher Copyright: © 2019 by the fib. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2018/10
Y1 - 2018/10
N2 - High-strength grouts are commonly used in the wind energy industry, where they are exposed to high cyclic loading. However, so far, concerning the specific fatigue behaviour of these grouts, any research is hardly available. Latest scientific results (e.g. Elsmeier (2018)) show that there is a divergent fatigue behaviour of high-strength grout compared to high-strength concrete. Above this, there are still considerable uncertainties regarding the impact of composition parameters like the paste volume or the maximum grain size dG on the fatigue resistance of high-strength grout. In particular, the interfacial transition zone and a tighter pore system in combination with the moisture content of the specimen seem to have an influence on the fatigue behaviour of high-strength grout. In fatigue tests with cement paste, a higher number of load cycles and significantly higher temperatures were reached. During some tests, drops of condensing water could be observed on the cold pressure plates of the testing machine. This could be an indicator of water vapour pressure, which might have led to a premature failure. Furthermore, some correlations could be shown between the increase in temperature during testing and the influence of the loading frequency fP, the maximum grain size dG and the paste volume.
AB - High-strength grouts are commonly used in the wind energy industry, where they are exposed to high cyclic loading. However, so far, concerning the specific fatigue behaviour of these grouts, any research is hardly available. Latest scientific results (e.g. Elsmeier (2018)) show that there is a divergent fatigue behaviour of high-strength grout compared to high-strength concrete. Above this, there are still considerable uncertainties regarding the impact of composition parameters like the paste volume or the maximum grain size dG on the fatigue resistance of high-strength grout. In particular, the interfacial transition zone and a tighter pore system in combination with the moisture content of the specimen seem to have an influence on the fatigue behaviour of high-strength grout. In fatigue tests with cement paste, a higher number of load cycles and significantly higher temperatures were reached. During some tests, drops of condensing water could be observed on the cold pressure plates of the testing machine. This could be an indicator of water vapour pressure, which might have led to a premature failure. Furthermore, some correlations could be shown between the increase in temperature during testing and the influence of the loading frequency fP, the maximum grain size dG and the paste volume.
KW - Fatigue behaviour
KW - Heating-rate
KW - High-strength grout
KW - Loading frequency fP
KW - Maximum grain size d
KW - Warming of specimen
KW - Maximum grain size dG
UR - http://www.scopus.com/inward/record.url?scp=85081085469&partnerID=8YFLogxK
M3 - Paper
SP - 1792
EP - 1801
T2 - 5th fib Congress, FIB 2018
Y2 - 7 October 2018 through 11 October 2018
ER -