粉煤灰对轻骨料混凝土抗硫酸盐腐蚀的影响.pdfVIP

学兔兔 2014年第 2期(总第 292期 ) 混 凝 土 原材料及辅助物料 Number 2 in 2014(Total No．292) Concrete MATERIAL AND ADMINICLE 粉煤灰对轻骨料混凝土抗硫酸盐腐蚀的影响 焦楚杰。余其俊 南理工大学 材料科学与工程学院，广东 广州510640) 摘 要：进行了硫酸钠溶液腐蚀与浸烘循环的双因素共同作用下轻骨料混凝土耐久性试验，研究结果表明：在腐蚀环境中，轻 骨料混凝土性能的总体趋势随时间推移而衰减，溶液浓度与腐蚀的力度成正向关系。在其他条件相同的情况下，随着粉煤灰掺量 的增加，混凝土强度耐蚀系数和相对动弹性模量逐渐提高，在粉煤灰掺量为40％时，出现从增至减的转折点。 关键词：粉煤灰；轻骨料混凝土；硫酸盐腐蚀；浸烘循环 中图分类号：TU528．04 文献标志码： A 文章编号： 1002—3550(2014)02—0054—03 Influences of fly ash on the resistance of lightweight aggregate concrete to sulphate attack JIAO Chujie，YUQ巧唧 (SchoolofMaterialsScience andEngineering，SouthChinaUniverisityofTechnolgy，Guangzhou 510640，China) Abstract： Durability experiments of lightweight aggregate concre~under interaction of double factors were conducted，and the factors were sulphate attack and soaking—drying circulation．The research results showed that the general trend of performances of lightweight aggregate concrete attenuate with time，and there was a positive relationship between the concentration of the sulphate solution and the corrosion degree to the lightweight aggregate concrete．Other being equal，the coefficient of strength resistance corrosion and the relative dynamic elastic modulus of lightweight aggregate concrete improve with the increasing of the amount of fly ash，and the turning point of the both two properties from increment to reduction occured when the amount of fly ash was 40％． Keywords： flyash；lightweight aggregate concrete；sulphate attack；soaking—drying circulation 型页岩陶粒、减水剂、水。基准配合比为，水泥：中砂：陶粒：水= 0 引言