高吸水树脂作为混凝土内养护材料的研究进展  

Research Progress on Super Absorbent Polymer as Internal Curing Materials of Concrete

作　　者：张媛媛[1] 毛倩瑾[1] 李松涛[1] 王子明[1] ZHANG Yuanyuan;MAO Qianjin;LI Songtao;WANG Ziming(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部,北京100124

出　　处：《硅酸盐学报》2022年第11期3009-3020,共12页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51621003)。

摘　　要：为保证混凝土质量,在混凝土施工过程中进行合理充分的养护是必不可少的。目前常用的洒水、覆膜等传统的外养护方式存在养护深度有限、对构件形状、施工部位依赖性大等问题,而采用内养护方式能够很好地解决这些问题,对于易于收缩开裂、不便进行外养护的部位和结构具有很好的应用价值。本工作回顾了内养护材料的发展,重点介绍了具有发展前景的内养护材料–高吸水树脂(SAP)的种类与吸/释水作用机理及相应的体积变化,综合归纳了在水泥基材料中SAP的吸/释水行为及其影响因素,探讨了SAP的掺入对于水泥基材料水化进程、孔隙结构和宏观性能的影响,并且对SAP作为混凝土内养护材料的发展方向进行了展望。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.

关 键 词：高吸水树脂 内养护 吸–释水行为 水化 孔隙结构 

分 类 号：TU528[建筑科学—建筑技术科学]