低钙粉煤灰在不同碱环境中的活化研究

Study of Activation of Low Calcium Fly Ash in the Different Alkali Surroundings

低钙粉煤灰是一种以硅、铝为主要成分含较多玻璃体的工业副产品,在通常情况下其水硬活性很低,只有在碱的作用下其活性才能显示出来。根据低钙粉煤灰的组成和结构特点,通过热失重和化学分析,研究了粉煤灰-石灰、粉煤灰-石灰-石膏体系在不同碱环境中的活化和反应程度,实验结果显示,复合碱对提高粉煤灰的活化和反应程度有促进作用。

Low calcium fly ash is an industrial by-product which it mainly contains silicate and aluminum oxide,and more glass body. At normal situation.it does not show the hydrated activation unless on the effect of alkali. According to composition and structure properties, the activation and degree of reaction of fly ash-lime and fly ash-lime-gypsum system are studied in different alkali surroundings. Test results show that complex alkali play an import-lant role on the activation and degree of reaction of fly ash.