| 種別 | paper |
| 主題 | Flexural Behavior of Steel Fiber Reinforced Concrete Under Low Temperatures |
| 副題 | |
| 筆頭著者 | petia STANEVA（Research Institute Sapporo） |
| 連名者1 | Koji SAKAI（Research Institute Sapporo） |
| 連名者2 | Takashi HORIGUCHI（Hokkaido Institute of technology） |
| 連名者3 | Nemkumar BANTHIA（University of British Columbia） |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 15 |
| 号 | 1 |
| 先頭ページ | 1241 |
| 末尾ページ | 1246 |
| 年度 | 1993 |
| 要旨 | INTRODUCTION The advantages of fiber reinforced concrete are well known and extensive research has been carried out for a long time in order to find a wider range of its economical application. The basic benefit of adding steel fibers into the concrete matrix is that steel fiber reinforced concrete (SFRC) holds higher ductility, crack opening resistance and, depending on type and amount of fibers, its strength is higher than that of the concrete matrix. Under low temperatures, the concrete matrix shows a more brittle character but some improvement in the strength. Rostasy and Sprenger found a greater improvement in the strength of SFRC than of plain concrete (PC) at low temperatures. Banthia's study showed that a reduction of 2 to 20% in the flexural toughness indexes (I5, I10, I30) occurred at temperature below zero compared with the conditions of normal temperature. The data related to the flexural behavior of SFRC are restricted to the constant amount and type of fibers and one level of temperature below zero. The objective of the present study is to obtain more data about the flexural behavior of SFRC at normal and low temperatures. CONCLUSIONS Based on the test results and their analysis, the following conclusions can be drawn; (1) A negligible increase in the compressive strength of SFRC compared to that of PC was found: (2) The effect of temperature on the flexural strength was found to be greater than the effect of fiber volume; (3) The flexural toughness increases with an increase of the volume of fibers; (4) The improvement in the flexural toughness with a decrease of temperature and a constant volume of fibers is influenced by the maximum load and the shape of the fibers. |
| PDFファイル名 | 015-01-1211.pdf |