液态无碱速凝剂性能检测方法探讨  

Performance testing methods of alkali-free liquid concrete accelerators

作　　者：郭文康[1,2,3] 王述银[1,2,3] 肖开涛[1,2,3] 

机构地区：[1]长江水利委员会长江科学院,湖北武汉430010 [2]国家大坝安全工程技术研究中心,湖北武汉430010 [3]水利部水工程安全与病害防治技术研究中心,湖北武汉430010

出　　处：《水利水电科技进展》2013年第1期66-69,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金重点资助项目(51139001);水利部公益性行业科研专项(200901066)

摘　　要：为了探讨适合液态无碱速凝剂性能的检测方法,分别采用JC 477—2005(我国建材行业标准)和TGPS.T 31—2005(参考欧洲标准制定的三峡集团企业标准)进行混凝土速凝剂性能检测试验,从速凝剂凝结时间、水泥胶砂抗压强度和水泥胶砂抗压强度比等几方面比较分析采用两种标准检测的液态无碱速凝剂的性能差异。结果表明:将JC 477—2005中速凝剂掺量提高2%左右,用两种标准检测的速凝剂凝结时间相差不大;TGPS.T 31—2005中增加的速凝剂水泥胶砂90 d抗压强度比的检测更能客观反应液态无碱速凝剂水泥胶砂的后期强度增长性能;液态无碱速凝剂水泥胶砂的抗压强度与龄期呈对数增长关系。In order to study performance testing methods suitable for alkali-free liquid concrete accelerators, performance testing tests of concrete accelerators were carried out with JC 477--2005 （ building materials standards of China） and TGPS · T 31--2005 （Three Gorges group standards making reference to the European standards ）. The performance data of alkali-free liquid concrete accelerators obtained from the two testing standards were compared from the setting times of accelerators and compressive strength ratio of cement mortar, etc. The results show that setting times obtained by the two performance testing standards are a little different when the proportion of the JC 477--2005＇ s accelerator is increased by about 2%. The late strength growth performance of cement mortar with alkali-free liquid accelerators can be better reflected by the 90 days’ compressive strength ratio of TGPS · T 31--2005. The compressive strength of cement mortar with alkali- free liquid accelerators is positively proportional to the age.

关 键 词：无碱速凝剂 减水剂 凝结时间 抗压强度比 检测方法 

分 类 号：TU528.042[建筑科学—建筑技术科学]