烧胀粉煤灰陶粒的膨胀机理研究  

Research on swell mechanism of fly ash ceramsite in firing

作　　者：陈烈芳[1] 

机构地区：[1]中国建筑学会建材分会轻骨料及轻骨料混凝土专业委员会,陕西西安710061

出　　处：《砖瓦》2005年第11期7-11,共5页Brick-tile

摘　　要：通过对22个省市40家电厂的粉煤灰进行理化性能及膨胀性能的试验研究,得出在一般条件下影响粉煤灰膨胀性能的主要因素及改善粉煤灰膨胀性能的主要途径;同时根据粉煤灰料球在烧制过程中所析出的膨胀气体组分、铁的价态变化规律指出了碳、碳铁比对膨胀、发气及铁的价态变化的影响。试验研究结果证明,参与粉煤灰陶粒的膨胀气体是铁和碳的氧化还原反应的产物。The paper concludes the main elements ＇affecting swell properties of fly ash and the main ways improving its performances by means of tests on physical chemical properties and swell properties which carried out by 40 electric power plants in China. And according to the tests of expansile gas components, the valence state change rule of iron, and the effect of carbon, carbon iron ratio on expansion, gas release and the valence state change of iron in firing fly ash ball, the paper gets the results that the expanded gas is the reactant of oxidation - reduction reaction.

关 键 词：烧胀性能 膨胀气体 铁的价态 氧化还原反应 

分 类 号：TU526[建筑科学—建筑技术科学]