高性能混凝土引气剂的制备及其性能研究  

Synthesis and properties of high performance air-entraining agent of concrete

作　　者：杨勇[1,2] 冉千平[1,2] 毛永琳[1,2] 周栋梁[1,2] 刘加平[1,2] 

机构地区：[1]江苏博特新材料有限公司 [2]江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室,江苏南京211103

出　　处：《新型建筑材料》2013年第4期59-63,共5页New Building Materials

摘　　要：采用化学合成与改性技术制备了一种新型的高性能混凝土引气剂。该引气剂为两亲性的分子结构,具有较低的表面张力和良好的气泡稳定性。较低掺量下,能有效提高混凝土的含气量且对抗压强度影响不大;从硬化混凝土气泡特征参数可以看出,该引气剂在混凝土中引入了大量细小且均匀分布的气泡,从而有效提高了混凝土的抗冻性;同时,该引气剂与聚羧酸减水剂具有良好的复配相容性,存储稳定性好。A new type of high performance air-entraining agent of concrete was prepared by chemical synthesis and modification. The structure of the air-entraining agent was amphiphiles. The air-entraining agent has a low surface tension and good air bubbles stability. At lower dosage,it can increase the air content obviously,and didn＇t decrease the strength of the hardened eoncrete. The air-entraining agent introduced lots of very fine and homogeneous ＂distribution air bubbles,and improved the frost resistance of the hardened concrete effectively. In addition, it has better compatibility and storage stability mixed with the polyearboxylie water-reducer.

关 键 词：引气剂 混凝土含气量 气泡特征参数 抗冻性 

分 类 号：TU528.042.4[建筑科学—建筑技术科学]