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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 ,利于推广应用
According to the traditional classification evaluation index (specific surface area index) of fly ash, the problem of activity of fly ash can not be completely reflected, and the activity test method and evaluation of fly ash are studied indoors through a large number of experiments. Nine different types of fly ash were selected for the study, and the activity was tested using different methods. On the basis of contrast fineness and activity index, a fly ash activity index HH is proposed, which combines the external macroscopic fineness control index (specific surface area) and internal activity control index (activity) of fly ash organically Together Finally, the relationship between H H and the early strength of lime-flyash gravel was measured. The results of strength tests showed that this indicator can be used to evaluate the activity of fly ash, and the test method is simple and conducive to the promotion and application