再养护液对受高温后高强混凝土的渗透性能的影响  

EFFECTS OF RECURRING LIQUID ON PERMEABILITY OF HIGH STRENGTH CONCRETE AFTER CALCINATION AT HIGH TEMPERATURE

作　　者：钱春香[1] 游有鲲[1] 李敏[1] 

机构地区：[1]东南大学绿色建材技术研究所,南京210096

出　　处：《硅酸盐学报》2006年第2期210-214,共5页Journal of The Chinese Ceramic Society

基　　金：教育部高等学校骨干教师计划项目;江苏省自然科学基金(BK99016);江苏省建设厅科技计划(JS200136)资助项目

摘　　要：采用3种再养护液,即水、硫酸铝溶液及氟硅酸镁硅酸钠溶液,研究了再养护液对掺加聚丙烯纤维及2种不同掺合料的高强混凝土经500℃高温后的湿迁移渗透系数及氯离子渗透系数的影响,并从显微结构和孔分布分析了渗透机理。研究表明:经3种养护液浸泡,高温后高强混凝土的湿迁移渗透系数及氯离子渗透系数降低,高强混凝土水泥浆体的孔隙率降低,孔径减小,形成了新的水化产物。The effects of recurring liquid on the water permeability and chorine ion permeability of a high strength concrete （HSC） containing polypropylene and two other admixtures after calcination at high temperature were investigated. The three types of recurring liquid studied were water, aluminum sulfate solution and magnesium fluosilicate - sodium silicate solution. The microstructure and pore size distribution of the concrete were studied. The results show that the water permeability and chorine ion permeability of the HSC decreases remarkably after the liquid recurs. After recurring, the porosity and pore size of the HSC paste decreases and new hydrates are observed.

关 键 词：高强混凝土 高温 再养护 渗透性能 

分 类 号：TU528.52[建筑科学—建筑技术科学]