Details
| Original language | English |
|---|---|
| Title of host publication | European Wind Energy Conference and Exhibition 2010, EWEC 2010 |
| Pages | 2422-2449 |
| Number of pages | 28 |
| Publication status | Published - 2010 |
| Event | European Wind Energy Conference and Exhibition 2010, EWEC 2010 - Warsaw, Poland Duration: 20 Apr 2010 → 23 Apr 2010 |
Publication series
| Name | European Wind Energy Conference and Exhibition 2010, EWEC 2010 |
|---|---|
| Volume | 4 |
Abstract
Grouted Joints are typical means of connecting the supporting structure with the foundation piles of Offshore Wind Energy Converters (OWECs). The resulting gap of two steel pipes with different diameters is filled using a mineral-bound, high strength grout. Because of the special offshore conditions the grout material needs a high reliability and robustness against segregation for the pumping process. Up to now high performance concrete can be used with compressive strength exceeding 100 N/mm2. Because of the brittleness and risk of cracking in case of high performance grout material, discussions have come up in Germany whether to use steel fibres due to their crack-bridging effects. In this paper the opportunities and risks of steel fibres in Grouted Joints are described regarding to their effects on the fresh and hardenend concrete properties as well as the load-deformation behaviour of the construction. It is necessary to balance needs for the controllability of the filling process and the risk of cracking of hardened grout materials with and without fibre reinforcement. To determine the influence of steel fibres on the workability, slump flow tests with and without blocking effects were made. Currently, it is not recommended to use steel fibres for structural purposes. High doses of steel fibres, which produce an identifiable improvement of the load bearing behaviour result in critical problems for the filling process.
Keywords
- Grouted joints, Offshore, Pumpability, Steel fibres
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Energy(all)
- Renewable Energy, Sustainability and the Environment
Sustainable Development Goals
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European Wind Energy Conference and Exhibition 2010, EWEC 2010. 2010. p. 2422-2449 (European Wind Energy Conference and Exhibition 2010, EWEC 2010; Vol. 4).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Opportunities and risks of steel fibres in grouted joints
AU - Lohaus, Ludger
AU - Lindschulte, Nick
AU - Anders, Steffen
PY - 2010
Y1 - 2010
N2 - Grouted Joints are typical means of connecting the supporting structure with the foundation piles of Offshore Wind Energy Converters (OWECs). The resulting gap of two steel pipes with different diameters is filled using a mineral-bound, high strength grout. Because of the special offshore conditions the grout material needs a high reliability and robustness against segregation for the pumping process. Up to now high performance concrete can be used with compressive strength exceeding 100 N/mm2. Because of the brittleness and risk of cracking in case of high performance grout material, discussions have come up in Germany whether to use steel fibres due to their crack-bridging effects. In this paper the opportunities and risks of steel fibres in Grouted Joints are described regarding to their effects on the fresh and hardenend concrete properties as well as the load-deformation behaviour of the construction. It is necessary to balance needs for the controllability of the filling process and the risk of cracking of hardened grout materials with and without fibre reinforcement. To determine the influence of steel fibres on the workability, slump flow tests with and without blocking effects were made. Currently, it is not recommended to use steel fibres for structural purposes. High doses of steel fibres, which produce an identifiable improvement of the load bearing behaviour result in critical problems for the filling process.
AB - Grouted Joints are typical means of connecting the supporting structure with the foundation piles of Offshore Wind Energy Converters (OWECs). The resulting gap of two steel pipes with different diameters is filled using a mineral-bound, high strength grout. Because of the special offshore conditions the grout material needs a high reliability and robustness against segregation for the pumping process. Up to now high performance concrete can be used with compressive strength exceeding 100 N/mm2. Because of the brittleness and risk of cracking in case of high performance grout material, discussions have come up in Germany whether to use steel fibres due to their crack-bridging effects. In this paper the opportunities and risks of steel fibres in Grouted Joints are described regarding to their effects on the fresh and hardenend concrete properties as well as the load-deformation behaviour of the construction. It is necessary to balance needs for the controllability of the filling process and the risk of cracking of hardened grout materials with and without fibre reinforcement. To determine the influence of steel fibres on the workability, slump flow tests with and without blocking effects were made. Currently, it is not recommended to use steel fibres for structural purposes. High doses of steel fibres, which produce an identifiable improvement of the load bearing behaviour result in critical problems for the filling process.
KW - Grouted joints
KW - Offshore
KW - Pumpability
KW - Steel fibres
UR - http://www.scopus.com/inward/record.url?scp=84866131022&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84866131022
SN - 9781617823107
T3 - European Wind Energy Conference and Exhibition 2010, EWEC 2010
SP - 2422
EP - 2449
BT - European Wind Energy Conference and Exhibition 2010, EWEC 2010
T2 - European Wind Energy Conference and Exhibition 2010, EWEC 2010
Y2 - 20 April 2010 through 23 April 2010
ER -