氯盐侵蚀后含掺合料混凝土微观形貌特征试验研究  

Micro-morphology feature of concrete mixed with mineral admixture after chloride corrosion

作　　者：殷惠光[1,2] 张连英[1] 李雁[1] 刘瑞雪[1,2] 李兵[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]徐州工程学院土木工程学院,江苏徐州221018

出　　处：《混凝土》2014年第8期27-29,共3页Concrete

基　　金：江苏省产学研前瞻性联合研究项目(BY2012085);住房和城乡建设部科学技术项目(2013-K4-22);国家建筑材料行业科技创新计划--面上研究项目(2013-M5-7);徐州市科技计划项目(XZZD1320);江苏省"青蓝工程"项目

摘　　要：利用扫描电子显微镜对氯盐侵蚀后不同掺合料混凝土微观形貌进行了观测,从细观角度研究了掺合料对混凝土微观形貌特征的影响。结果表明:1随着粉煤灰、矿粉掺量的增加,混凝土细观结构变的致密,孔隙减少,抗渗性能增强;2掺加粉煤灰和矿粉的混凝土交界面缝隙变小,骨料和水泥浆之间连接紧密,提高了混凝土自身的抗渗性能。The micro-morphology feature of concrete mixed with mineral admixture after chloride corrosion was studied by SEM ,and the influence of mineral admixture on the microstructure of concrete was analyzed in micro-view.The results showed that ①The microstructure of concrete became dense and pore decreased with more fly ash or slag added which led to a better impervious performance.②The performance of concrete impermeability was improved when fly ash or slag was added ,and the interface apertures became smaller and the connection between aggregate and cement paste became tight.

关 键 词：粉煤灰 矿粉 混凝土 扫描电镜 微观形貌 

分 类 号：TU528.01[建筑科学—建筑技术科学]