ZHANG Yuanyuan (1998-), female, Master candidate. E-mail: Zhangyuanyuan@emails.bjut.edu.cn
It is essential for the quality of concrete to carry out reasonable and adequate curing during the construction of concrete. The conventional external curing methods such as watering and coating, which are commonly used at present, have some problems of limited curing depth and dependence on the shape and construction part of the member. The internal curing method can solve these problems well and has a good application potential for the parts and structures that are easy to shrink, crack and inconvenient for external curing. This review represented recent development on the internal curing materials, and focused on the types of super absorbent polymer (SAP) as the promising internal curing materials and the mechanism of water absorption/release and the corresponding volume change. The water absorption/release behavior of SAP in cementitious materials and its influencing factors were summarized. The influence of SAP on the hydration process, pore structure and macroscopic properties of cementitious materials was discussed. In addition, the future direction of using SAP as an internal curing material for concrete was also envisaged.
| 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 |