流体毛细吸收法表征水泥压实体结构  

Characterization of structures of cement compacts by method of capillary ethanol absorption

作　　者：沈业青[1] 邓敏[2] 孙成玉 

机构地区：[1]安徽师范大学功能性分子固体省部共建教育部重点实验室化学与材料科学学院,安徽芜湖241000 [2]南京工业大学材料科学与工程学院材料化学工程国家重点实验室,江苏南京210009 [3]山东山水水泥集团有限公司,山东济南250102

出　　处：《混凝土》2012年第12期1-3,共3页Concrete

基　　金：国家重点基础研究发展计划(2009CB623105);高性能土木工程材料国家重点实验室开放基金资助(2010CEM018)

摘　　要：通过压制干粉水泥制备压实体有助于水泥水化初始结构的可调控制备。利用乙醇毛细吸收的方法设计流体吸收量与时间平方根的线形相关系数、流体吸收系数、压实体孔隙率、流体相对吸收体积和压实体相对压缩体积等参数表征了水泥压实体结构。研究结果表明:水泥压实体在加压制备过程中实现了水泥颗粒的随机均匀分布,没有明显的颗粒团簇和粉体结拱现象,流体能在水泥压实体中均匀饱和吸收。这为水泥水化初始结构的表征和量化制备奠定了基础。A method of compacting dry cement in a special mould can benefit to control preparation of initial hydrating structure of cement.Lin- ear correlation coefficient between absorption weight and square root of absorption time, coefficient of liquid absorption into cement compacts, porosity of cement compacts, relative volume of capillary absorption and relative volume of compacting deduction were adopted to evaluate struc- ture of cement powder packing.The results showed that cement powders were randomly and homogeneously distributed in cement compacts, no visible cluster of grains and arching of powders occurs in cement compacts.Absorbed liquid could fully saturate into the pores of cement compacts. A homogeneous and saturated compact is a foundation work for control preparation of hydrating structure of cement.

关 键 词：水泥压实体 结构 乙醇 毛细管作用 

分 类 号：TU528.01[建筑科学—建筑技术科学]