| 报告题名: | Energy absorption capacity for fibre reinforced sprayed concrete : effect of panel production technique, fibre content and friction in round panel tests with continuous steel support (Series 8 and 9) |
| 作者: | Bjøntegaard, Øyvind
|
| 出版者: | Vegdirektoratet
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| 出版年: | 2010
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| 发表日期: | 2010-09-28
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| 国家: | 挪威
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| 语种: | 英语
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| 英文关键词: | Sprøytebetong
; Fiberarmert betong
; Friksjon
; Tester
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| 中文主题词: | 吸收
; 吸附作用
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| 主题词: | ABSORPTION
|
| 英文摘要: | The test program is part of the on-going revision of The Norwegian Associations publication no. 7 (Sprayed concrete for
rock support), which among others is to be harmonized with the new European regulations for determination of energy
absorption capacity of fiber reinforced sprayed concrete.
After realising the very significant and varying effect of friction in panel tests with continuous support of wood it was
decided to concentrate the further investigations on support of steel.
The present results show that the average coefficient of variation for the energy absorption capacity (EAC) at 25 mm displacement
among all 6 individual sets in Series 8 was 7.1 % and among the six sets in Series 9 it was 8.7 %.
For the parallel sets in Series 8 performed with and without friction-reducing bedding material, the results show that friction
between the panel and the supporting ring of steel constitutes 25.7% and 25.0% of what is taken to be energy
absorbed by the panel at final displacement of 25 mm. This is in line with earlier results.
The cast panels had on average 90% energy absorption capacity compared to the sprayed panels. Possible influencing
parameters are different air content, fibre orientation, compaction and w/c-ratio for cast and sprayed panels. The amounts
of data are yet too scarce to draw general conclusions.
Series 9 was dominated by the panel fibre contents being strongly overdosed compared to the intended nominal dosages
and, correspondingly, the energy absorption values became high, especially for the steel fibre mixes. The fiber measurements
in fresh concrete differed strongly from the fibre measurements that was done on samples from the panels after
testing. |
| URL: | https://brage.bibsys.no/xmlui/bitstream/handle/11250/193672/teknologirapport_2612.pdf?sequence=1&isAllowed=y
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/28496
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| teknologirapport_2612.pdf（20000KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Bjøntegaard, Øyvind. Energy absorption capacity for fibre reinforced sprayed concrete : effect of panel production technique, fibre content and friction in round panel tests with continuous steel support (Series 8 and 9). 2010-01-01.
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