FENG Taotao (1990-), male, Doctoral candidate. E-mail: Taotao_F@126.com
Ultra-high performance concrete (UHPC) was designed with different replacement percentages of manufactured sand, i.e., 0%, 25% 50%, 75%, and 100% (in mass fraction). The properties of the UHPC, including the quasi static and dynamic mechanical properties, were examined. The results show that the compressive strength of UHPCs with manufactured sand as fine aggregates is similar to that of the reference mixture with only river sand. The UHPC with manufactured sand has superior dynamic mechanical properties. The UHPC with manufactured sand has an effect on its strain rate, and the dynamic increase factor has a logarithmic function relation with the strain rate. In addition, the finite element method was also employed to simulate the impact process of the UHPC with manufactured sand.
| 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 |