掺石灰石粉-粉煤灰胶砂抗硫酸盐侵蚀及机理分析  

Effect and mechanism analysis of ground limestone and fly ash on the sulfate attack of cement mortar

作　　者：袁庆莲 金勇刚 王勇飞 

机构地区：[1]湖南省建筑科学研究院,湖南长沙410007

出　　处：《新型建筑材料》2013年第11期22-26,共5页New Building Materials

摘　　要：通过测试水泥胶砂不同龄期抗蚀系数变化,研究了单掺石灰石粉、粉煤灰以及石灰石粉与粉煤灰双掺对水泥胶砂抗硫酸盐侵蚀性能的影响,结合测定硫酸根离子含量并采用XRD微观分析手段对其进行了机理分析。研究结果表明,随石灰石粉掺量增加试件中硫酸根离子含量增加;粉煤灰的掺入能减少胶砂试件硫酸根离子含量。掺石灰石粉胶砂试件在5%Na2SO4溶液中浸泡8个月,发现了膨胀产物石膏。In this paper, the effects of resistance coefficient of limestone powder and fly ash and the mixed addition of lime-stone powder and fly ash on the concrete sulfate attack were studied,by measuring content of sulfate-ion and XRD. The results in-dicate that the content of sulfate-ion increase as the replacement of ground limestone increasing. Fly ash is better for decreasing the content of sulfate-ion. The addition of fly ash can effectively improve the content of sulfate-ion of the concrete with ground limestone powder. The gypsum was found in the specimens with ground limestone addition after immersed in 5% Na2SO4 solution for eigth months.

关 键 词：石灰石粉 粉煤灰 胶砂 抗蚀系数 硫酸根离子含量 XRD 

分 类 号：TU528[建筑科学—建筑技术科学]