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Outline
In order to deeply study the micromechanism of polypropylene steel-like fiber permeable concrete, the CT scanning technology was used to scan the specimens, and a visualization model of the pore structure was established through three-dimensional digital reconstruction technology. Based on the image analysis method, a comparative study was carried out on the morphological evolution characteristics of the internal pore system of the material before and after fiber modification. The results show that the addition of polypropylene steel-like fibers can effectively improve the strength of the specimens, but it will inhibit the water-permeability performance of the specimens. The porosity of each layer of the specimens is stable in the range of 15% and 20%, and the connected pores account for more than 97% of the total pores. In the specimens without added fibers, the number of large pores is small, but their volume proportion is large. After adding fibers, some large pores are transformed into medium-sized pores and the connectivity between pores is inhibited, thus changing the pore structure.
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| 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 |
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