Full
BAO Jiuwen (1989-), male, Ph. D., Associate Professor. E-mail: baojiuwen@qut.edu.cn
Outline
Two kinds of emulsion organic silicon and two types of powder organic silicon, with different contents (0, 0.25%, 0.50%, 1.00%, in mass fraction) were mixed into concrete. The water absorption behavior of hydrophobic concrete internally incorporating organic silicon was investigated by contact angle, compressive strength and capillary absorption measurements. The results show that the effect of emulsion organic silicon on the compressive strength of concrete at the same age is less than that of powder after the addition of organic silicon. The concrete with 0.25% emulsion organic silicon has a little effect on its compressive strength during 28 d curing. The compressive strength is reduced by 0.5% and 7.8% when the water-cement ratio is 0.53 and 0.35, respectively. After a silicon membrane is formed on the concrete surface, the contact angle reaches over 100° and is not affected by further increasing admixture amount of organic silicon. In addition, compared to ordinary concrete, the amount of absorbed water is reduced by 60% at least and the water absorption rate is stabilized for 36 h after the addition of silicon into 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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