硅灰和纤维对轻骨料混凝土抗冻性能的影响  

Effect of Silica Fume and Fibers on Frost Resistance Durability of Lightweight Aggregate Concrete

作　　者：霍俊芳[1] 

机构地区：[1]内蒙古工业大学建筑工程学院,呼和浩特010051

出　　处：《武汉理工大学学报》2008年第11期65-68,共4页Journal of Wuhan University of Technology

基　　金：内蒙古自治区自然科学基金(200711020715);十一五国家科技支撑计划项目(2006BAJ05B06-06)

摘　　要：通过在轻骨料混凝土中掺入硅灰、纤维,研究轻骨料混凝土在冻融单独作用及冻融-硫酸钠复合作用下的抗冻耐久性。研究发现,轻骨料混凝土的硫酸钠-冻融的复合损伤明显大于单一冻融损伤。混合纤维的加入,对轻骨料混凝土冻融后的强度损失有一定的改善作用。硅灰和粉煤灰掺入混合纤维轻骨料混凝土,界面过渡区明显改善,抗冻融耐久性显著提高。Silica fume and fibers were used to mix and reinforce lightweight aggregate concrete （LWAC）. Durability of LWAC is researched, which including freezing-thawing in salt solution （5% Na2SO4） and in water. The results show that LWAC durability deteriorates more rapidly under freezing-thawing in salt solution than in water. The strength loss of and the frost resistance durability of LWAC is improved by mixing fibers. By introduction the fly ash and silica fume can improve interfacial transition zone（ ITZ）and the frost resistance of fibers reinforcement LWAC dramatically.

关 键 词：轻骨料混凝土 纤维 硅灰 抗冻耐久性 界面过渡区 

分 类 号：TU528.2[建筑科学—建筑技术科学]