粉煤灰活性测试方法研究

Research on How to Measure Activity Peculiarity of Flyash

针对粉煤灰的传统分级评价指标 (比表面积指标 ) ,不能够完整反应出粉煤灰活性的问题 ,在室内通过大量实验对粉煤灰的活性测试方法及评价进行了研究。研究中选取了 9种不同类型的粉煤灰 ,运用不同方法对活性进行了测试。在对比细度以及活性度指标基础上 ,提出了粉煤灰活性指数指标 H H,该指标将粉煤灰的外部宏观细度控制指标 (比表面积 )及内部活性控制指标 (活性度 )有机地结合在一起。最后实测了 H H 与二灰砂砾早期强度之间的关系 ,强度试验结果表明 ,该指标能够用于评价粉煤灰的活性 ,并且测试方法简单 。

To counter the problems of traditional classification index of flyash, the index of fine degree can't reflect it's activity fully So the testing method and estimate method of the activity peculiarity of flyashes are researched by a great deal of experiments in laboratory In this research, 9 kinds of flyashes are selected and their activities peculiarities tested in different ways On the basis of contrasting the fine degree and activity degree, the activity index of flyash ( HH ) are put out. The exterior macroscopic fine degree (the specific surface area) is connected with the interior index (activity degree) together well. At last the relations between HH with the strength of lime stone and flyash gravel are tested The strength tests indicate that the activity index can estimate the activity of flyash, and the testing way is simple and easy to apply