硅藻土的水热固化及其湿度调节性能研究  

Hydrothermal solidification of diatomite and its humidity controlling property

作　　者：佟钰[1] 张君男[1] 王琳[1] 马秀梅[1] 王晴[1] 

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168

出　　处：《新型建筑材料》2015年第4期14-16,58,共4页New Building Materials

基　　金：国家十二五科技支撑重大项目(2011BAJ10B04);沈阳建筑大学科研基金(2013133)

摘　　要：以硅藻土为主要原料,采用水热固化工艺制得具有较高力学强度的制品,在一定程度上保留硅藻土的规则孔隙特征和吸放湿能力;通过调整配比、优化焙烧、模压等工艺参数,优化硅藻土制品的吸/放湿功能。结果表明,焙烧后硅藻土水热固化体的孔隙有效利用率提高,放湿量明显增大;提高硅藻土掺量或减小成型压力,有利于水热固化体吸/放湿性能的改善,但对强度存在不利影响。Diatomite was employed as the critical raw material to obtain a kind of construction product with reasonable me- chanical strength by a process of hydrothermal solidification,in which the intrinsically regular pore structure and water adsorption/ desorption capacities of diatomite could be retained to some extent. The influence of diatomite content,high-temperature calcina- tion, and molding pressure were investigated systematically to upgrade the humidity adsorption/desorption capacity of hydrothermally solidified diatomite （HSD）. The experimental results show that the processing of calcination is helpful to improve the relative ca- pac!t~ of humidity desorption due to the adjustment of pore structure,increasing the content of diatomite,or decreasing the pressure for molding,must gives rise of an evident improvement to the humidity controlling property of HSD products,bnt simultaneously makes a negative contribution to the mechanical strength.

关 键 词：硅藻土 水热固化 调湿 强度 

分 类 号：TQ433.437[化学工程]