硫酸钠型激发剂对混凝土性能影响研究  

Research of the effection of complex activator based on Na_2SO_4 on concrete performances

作　　者：李保亮[1] 徐洪伟 丁百湛[1] 雍洪宝 

机构地区：[1]淮安市建筑工程检测中心有限公司,江苏淮安223001 [2]江苏名和集团有限公司,江苏镇江212143

出　　处：《商品混凝土》2012年第10期28-30,27,共4页Ready-Mixed Concrete

摘　　要：本文探讨了激发剂Na_2SO_4、三乙醇胺、NaNO_2及三者复掺在混凝土中的应用研究。结果表明:少量的Na_2SO_4、三乙醇胺、NaNO_2均有利于提高混凝土坍落度及早期强度,但Na_2SO_4、NaNO_2复掺不利于混凝土后期强度的增长。而Na_2SO_4、三乙醇胺复掺既有利于提高混凝土早期强度,又有利于提高混凝土后期强度。适当比例的Na_2SO_4、三乙醇胺、NaNO_2标养条件下可以大幅度提高混凝土早期强度,负温下则可起到良好的防冻效果。The study on application of Na_2SO_4,triethanolamine,NaNO_2 and their mixture in concrete were studied in this paper.The results showed that,a smaller amount of Na_2SO_4,triethanolamine,NaNO_2 could improve the slump of concrete,increase the early strength of concrete,but a larger amount of Na_2SO_4 and NaNO_2 will reduce the long-term strength of concrete.However,the complex activator based on Na_2SO_4 and triethanolamine could improve both the early strength and the later strength of concrete.A suitable ratio of Na_2SO_4, triethanolamine and NaNO_2 could improve the early strength remarkably under standard curing condition,at the same time,at negative temperature,it could improve the effect of frost resistance of concrete.

关 键 词：Na₂SO₄ 三乙醇胺 NaNO₂ 

分 类 号：TU528[建筑科学—建筑技术科学]