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In order to study the influence of mineral admixture on steam-cured concrete under freeze-thaw environment, CT technology was used to scan the steam-cured concrete after freeze-thaw cycle, and the sectional images were obtained. The three-dimensional reconstruction of steam-cured concrete was carried out by Fiji and Avizo software, and the pore structure characteristics of the samples were obtained. The results show that the compressive strength of steam-cured concrete decreases with the increase of freeze-thaw times, and the deterioration of pore structure is the main reason for the decrease of compressive strength; The mechanical properties and pore structure characteristics of steam-cured concrete mixed with mineral powder and fly ash are better than those of ordinary steam-cured concrete under the same freeze-thaw conditions. The mineral powder and fly ash have a certain effect on improving the pore structure of steam-cured concrete.
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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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