粉煤灰综合利用 FLYASHCOMPREHENSIVEUTILIZATION 2011 NO.5 传题研免 掺Ⅱ级粉煤灰胶砂试件在高浓度硫酸盐侵蚀下 的破坏特征与破坏机理分析* Destruction Features and Failure Mechanism Analysis of Mixed I Fly Ash Motar Specimens in the High Concentrations of Sulfate Solution 李方元,唐新军,阿里木江苏拉依曼,周阳² (1.新疆农业大学水利与土木工程学院,乌鲁木齐830052;2.石河子大学水利建筑工程学院,石河子832000) 摘要:按高性能混凝土配比方法制作不同水胶比、I级粉煤灰不同掺量的胶砂试件,进行硫酸盐侵蚀试验1nn采用 扫描电镜(SEM)和能谱(EDS)对试件进行微观观测、分析,结果表明:在低水胶比情况下,掺粉煤灰的胶砂试件受高浓度 要与水胶比、粉煤灰掺量、侵蚀龄期、侵蚀溶液浓度等因素有关1nn 关键词:Ⅱ级粉煤灰;胶砂试件;硫酸盐侵蚀;微观结构;侵蚀破坏特征 中图分类号:TU528.0文献标识码:A文章编号:1005-8249(2011)05-0009-05 Li Fang-yuan1 Tang Xin-junl Alim Sulayman1 ZHOU Yang2 (1.College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, Xinjiang,China 2. College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi 83200, Xinjiang,Chian) Abstract Thecapablityof resising sulfecoosion wastested among the diferent cntens oIly h and diferet waerbinderatios f mortar specien which were madeby the method of hig perfomane concrete.Microcopic obervation and analysis of mortar specimens was observed with scanning electron microscope (SEM) and energy dispersion spectrum (EDS) . The results indicated thst under the low wster-binder rtio,Spcimen ersin dmage tyeis gypumfilure tye,no etrngt Af)tyeroindaage.We also foud hat the rin nlyOcd in the urface and the factors affting the thickee of Eroon damge layer mainly include the walerbinder ratiothe cote f fly ash,the eroeion ages、the erion solution concentration,et. Key words: I fly ash; mortar specimen; sulfte correion; microstructure; Erosion destruction feture 混凝土遭受硫酸盐侵蚀本质上是水泥石的侵硫酸盐侵蚀后的外部特征、内部微观结构以及影响因 蚀"1nn混凝土受硫酸盐侵蚀破坏的程度受养护条件、素,以便进一步了解混凝土受硫酸盐侵蚀的特点及其 水泥品种、水胶比、掺合料掺量、硫酸盐浓度等诸多因作用机理,为有硫酸盐侵蚀环境的混凝土结构设计提 素影响1nn这使得硫酸盐对水泥混凝土的侵蚀现象及其 供参考依据1nn 过程变得复杂1nn本文通过掺Ⅱ级粉煤灰胶砂试件在短 龄期养护条件下的硫酸盐侵蚀试验,采用宏观观测和 1试验材料与试验方法 微观电镜观测技术,分析掺Ⅱ级粉煤灰胶砂试件遭受 1.1试验原材料 (1)水泥:乌鲁木齐市青松水泥厂生产的P.042.5R ‘基金项目:新疆高等学校科研计划重点项目资助(XJ 的水泥(其各项物理指标见表1,化学指标见表2);(2)粉 EDU2008115) ; 煤灰:新疆苇湖梁电厂晨科公司生产的Ⅱ级粉煤灰 新疆水...
掺Ⅱ级粉煤灰胶砂试件在高浓度硫酸盐侵蚀下的破坏特征与破坏机理分析.pdf
