ZHANG Xiuzhi (1974-), female, Ph. D., Associate Professor. E-mail: mse_zhangxz@ujn.edu.cn
The dispersion and orientation of steel fibers in the matrix have a significant impact on the mechanical properties and durability of steel fiber concrete (SFC). Some factors affecting the dispersion and orientation of fibers in SFC were summarized in terms of mixing proportion, rheology of the mixtures, construction technology and element shape. The results showed that the distribution characteristics of the fibers were affected synergistically by various factors before the mixtures were formed and hardened. Moreover, the distribution of steel fibers was optimized accordingly under different working conditions. There were three types of poor dispersion of steel fibers. Besides, three approaches were used to improve the orientation of steel fibers based on the construction technologies and the element shapes. In addition, some problems in steel fiber distribution characteristics and possible future research direction were also discussed.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |