氯盐侵蚀环境下后张预应力灌浆料耐久性研究  

Study on durability of post-tensioning prestress grouts in chloride environment

作　　者：朱传斌 陆瑾[2] 谷坤鹏[3] 

机构地区：[1]中铁大桥局武汉桥梁科学研究院,湖北武汉430034 [2]中国建材国际工程集团有限公司,上海200063 [3]中交上海三航科学研究院有限公司,上海200032

出　　处：《新型建筑材料》2013年第9期19-23,共5页New Building Materials

摘　　要：基于科学的试验方法与先进的外加剂技术,分析了影响氯环境下后张预应力高性能灌浆料耐久性的泌水性能、早期膨胀率、中后期体积稳定性、总氯离子含量和抗氯离子渗透性能等几项重要性能;分析了外加剂改善各项性能的作用机理;分析了水灰比对早期膨胀率、中后期体积稳定性和抗氯离子渗透性能的影响;根据Nernst-Einstein方程,推出氯离子扩散系数与电通量呈正比关系,并结合寿命预测模型对灌浆料的耐久性进行分析。Based on the scientific testing methods and advanced admixture technology,bleeding, early age expansion,middle age and later volume stability, total chloride ion content and permeability to resist chloride ion penetration which can influence durabil- ity of post-tensioning high performance grouts in chloride environment are analyze＆the mechanism of admixture to improve perfor- mance of grouts are analyzed; the influence of water-cement ratio on early age expansion, middle age and later volume stability and permeability to resist chloride ion penetration are analyzed;the direct proportion between chloride ion diffusion coefficient and elec- tric charge is deduced by according to Nernst-Einstein equation,and then durability of grouts is analyzed according to service life model.

关 键 词：后张预应力 灌浆料 耐久性 侵蚀 氯离子 

分 类 号：TU528[建筑科学—建筑技术科学]