煅烧煤矸石胶凝活性评价方法分析

Analysis of pozzolanic activity evaluation methods for calcined coal gangue

为了研究煅烧煤矸石不同活性评价方法之间的关系,利用NMR、XPS、ICP等分析手段,分别采用强度评价法、聚合度评价法、活性硅铝溶出评价法以及XPS评价法,对不同温度煅烧煤矸石的火山灰活性进行了评价,并分析了不同评价方法之间的关系.结果表明不同活性评价方法均可以在一定程度上反映煤矸石胶凝活性的变化规律.其中,强度评价法、聚合度评价法对煅烧煤矸石的火山灰活性变化更为敏感,而XPS评价法、活性硅铝溶出法相对较差.其中就煅烧煤矸石而言,强度评价法和聚合度评价法更适合于煤矸石火山灰活性评价,并且二者者之间存在较好的相关性.

In order to study the correlations between different pozzolanic activity evaluation methods of calcined coal gangue, NMR, XPS, ICP, XRD techniques are employed. The pozzolanic activity of coal gangue calcined at different temperatures is evaluated by strength method, polymerization degree method, chemical method and XPS method. The correlations of these results obtained from different methods are analyzed. It is found that these evaluation methods can reflect the changes of pozzolanic activities, among which strength method and polymerization degree method are more sensitive to pozzotanic activity of calcined gangue than chemical method and XPS method. For calcined coal gangue, strength method and polymerization degree method are more appropriate for pozzolanic activity evaluation. There is an obvious correlation between strength method and polymerization degree method.