旁路窑灰—粉煤灰硅酸盐制品中钾石膏的形成对其性能的影响  

The formation of syngenite exerts an influence on performance of silicate products with pfa and pass kiln dust

作　　者：陈薇[1] 陆纯煊[2] 

机构地区：[1]国家建材局科技发展司 [2]中国建筑材料科学研究院耐火所

出　　处：《建筑节能》1990年第5期12-16,11,共6页BUILDING ENERGY EFFICIENCY

摘　　要：本文研究了旁路窑灰—粉煤灰蒸养制品中钾石膏的形成,发现制品中K_2O和SO_3含量的增加以及掺适量的硅灰均有利于钾石膏的形成。通过用扫描电镜观察取得了钾石膏在各蒸养阶段的形貌。其结果表明,制品中K_2O和SO_3含量较高时,蒸养初期强度较高,后期强度降低是由于钾石膏晶体随蒸养时间变化造成的。蒸养初期,交错生长的完整晶体有利于制品强度提高,而蒸养后期,钾石膏晶体被破坏则使制品的强度倒缩。In the paper, the author studied the formation of syngenite in the steam cured products made by fly ash and by-pass kiln dust, it is found that high K_2O and SO_3 content in the products is beneficial to the formation of syngenite, so is plenting silica observed with SEM. fume.The morphorlogies of syngenite at different curing age are The results show that if K_2O and SO_3 is over contents in the products, its compressive strength higher at initial age, but it is decreased at later age. This is owing to the changes of syngenite with curing time: at initial age, across-formated perfect crystal is beneficial to increasing the compressive strength of products, but at later age destroyed syngenite result in the decrease of compressive strength of products.

关 键 词：硅酸盐制品 蒸养 后期强度 硅灰 完整晶体 窑灰 初期强度 制品强度 蒸汽养护 扫描电镜图 

分 类 号：TU111.48[建筑科学—建筑理论]