Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rebound reduction in steel fiber reinforced dry-mix shotcrete through matrix modifications
In steel fiber reinforced dry-mix shotcrete, the properties at mature ages depend not so much on the batched mix design, but on the in-situ mix proportion. This is due to the considerable material and fiber rebound that alters the in-place mix constitution, and in particular, lowers the in-situ fiber volume fraction. While the use of silica fume reduces rebound and results in a higher in-place fiber volume fraction, presence of silica fume also introduces an increased brittleness in the matrix. It is, therefore, necessary to explore alternatives to silica fume, which will satisfy the dual needs of reducing fiber rebound while maintaining the post peak energy absorption capability. In this paper, the use of High-Reactivity Metakaolin (HRM) was investigated as an alternative to silica fume for steel fiber reinforced dry-mix shotcrete. It was concluded that while HRM on its own is not as efficient as silica fume in reducing fiber rebound, a blend of silica fume and HRM achieves a significant control over rebound and results in a superior post-peak energy dissipation capability.
Rebound reduction in steel fiber reinforced dry-mix shotcrete through matrix modifications
In steel fiber reinforced dry-mix shotcrete, the properties at mature ages depend not so much on the batched mix design, but on the in-situ mix proportion. This is due to the considerable material and fiber rebound that alters the in-place mix constitution, and in particular, lowers the in-situ fiber volume fraction. While the use of silica fume reduces rebound and results in a higher in-place fiber volume fraction, presence of silica fume also introduces an increased brittleness in the matrix. It is, therefore, necessary to explore alternatives to silica fume, which will satisfy the dual needs of reducing fiber rebound while maintaining the post peak energy absorption capability. In this paper, the use of High-Reactivity Metakaolin (HRM) was investigated as an alternative to silica fume for steel fiber reinforced dry-mix shotcrete. It was concluded that while HRM on its own is not as efficient as silica fume in reducing fiber rebound, a blend of silica fume and HRM achieves a significant control over rebound and results in a superior post-peak energy dissipation capability.
Rebound reduction in steel fiber reinforced dry-mix shotcrete through matrix modifications
Verminderung des Rückpralls in Stahlfaser-verstärkten trockengemischtem Spritzbetion durch Modifikation der Matrix
Bindiganavile, V. (Autor:in) / Banthia, N. (Autor:in)
2000
9 Seiten, 5 Bilder, 4 Tabellen, 9 Quellen
Aufsatz (Konferenz)
Englisch
Rebound reduction in steel fiber reinforced dry-mix shotcrete through matrix modifications
| British Library Conference Proceedings | 2000
STEEL FIBER REBOUND IN SHOTCRETE
| Online Contents | 1998
Specifying Steel Fiber Reinforced Shotcrete
| British Library Conference Proceedings | 1996
Specifying Steel Fiber Reinforced Shotcrete
| British Library Conference Proceedings | 1997
Experimental behavior of mesh reinforced shotcrete and steel fiber reinforced shotcrete panels
| BASE | 1998