ZHANG Ai (1992-), female, Ph.D. E-mail: zgaino1@163.com
Solvent exchange method is widely used in the drying and hydration termination of cement-based materials. This review represented the influence of solvent exchange on the microstructure of cement paste. The selection principle of exchange parameters (i.e., sample size, liquid/solid ratio, exchange time and removal method) was described. The physical and chemical reactions between common exchange solvents (i.e., isopropanol, acetone, methanol, and ethanol) and cement hydration products (i.e., calcium hydroxide, calcium silicate hydrate and ettringite) were discussed. The pore structure parameters (i.e., porosity and pore size distribution) of cement-based materials were analyzed under the influence of exchange parameters and solvents. In addition, the existing problems and research prospects of the solvent exchange method were also given.
| 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 |