硅酸盐学报2017，Vol.45Issue(5)：690-696,7.DOI:10.14062/j.issn.0454-5648.2017.05.15
熟料中碱金属硫酸盐对水泥早期凝结的影响
Effect of Alkali Sulfates in Clinker on Early Setting Behavior of Portland Cement
摘要
Abstract
Alkali sulfates in clinker have an impact on the early setting behavior and fluidity of Portland cement.The calcined alkali sulfate as well as analytically pure alkali sulfate were introduced to investigate the effect on fluidity of cement paste.The premature stiffening of cement paste was measured by the ASTM C451 standard test method for the early stiffening of hydraulic cement (i.e.,the paste method).There is a difference between the fluidities of cement pastes doped with calcined alkali sulfate and analytically pure alkali sulfate.The relationship between alkali sulfates and premature stiffening of Portland cement was determined.The percent final penetration of Portland cement was tested by the ASTM C451 standard method,obtaining the normal setting area,flash setting area and false setting area.The cement compositions are manipulated to cause the premature stiffening (i.e.,flash set and false set).Based on the results by X-ray diffraction and differential thermogravimetry,the syngenite formation is due to the premature stiffening,and the AFm formation is due to the flash set behavior.关键词
硫酸钠钾/硫酸钾/硫酸钠/钾石膏/速凝/假凝Key words
aphthitalite/arcanite/thenardite/syngenite/flash set/false set分类
化学工程引用本文复制引用
孙化强,钱觉时,杨莎,熊青青,陈祥超..熟料中碱金属硫酸盐对水泥早期凝结的影响[J].硅酸盐学报,2017,45(5):690-696,7.基金项目
国家自然科学基金重点项目(51132010) （51132010）
国家“十二五”科技支撑计划项目(2011BAA04B04)资助. （2011BAA04B04）
