表观密度与体积密度在《土木工程材料》课程中的概念辨析  

Concept of Discrimination BetweenApparentDensity and Envelope Density in the Civil Engineering Materials Course

作　　者：欧志华[1] 李家楣 李兆超 李游 曹晖[1] 李艳[1] 薛艺[1] 薛志清[1] OU Zhihua;LI Jiamei;LI Zhaochao;LI You;CAO Hui;LI Yan;XUE Yi;XUE Zhiqing(School of Civil Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan,China)

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《上海建材》2022年第5期31-34,共4页Shanghai Building Materials

基　　金：湖南省普通高等学校课程思政建设研究项目(HNKCSZ-2020-0383);湖南省学位与研究生教育改革研究项目(2020JGYB203);湖南工业大学教学改革研究项目(2021ZD03)。

摘　　要：表观密度和体积密度是土木工程材料课程中的重要概念,但两者在教材、标准和辞典中的表述常常存在混淆。通过对两者混淆情况分析,认为应该明确区分表观密度和体积密度,两者都需要有唯一的定义。表观密度为材料单位表观体积的质量,表观体积只包括材料固体物质本身的体积和材料内所含闭口孔的体积,不包括开口孔的体积。体积密度为材料单位外观体积(或外形体积)的质量,即材料的质量除以材料的外观体积(或外形体积),外观体积(或外形体积)包括固体物质本身的体积和材料内所含全部孔隙(包括开口孔和闭口孔)的体积。Apparent density and envelope density are two critical concepts in the Civil Engineering Materials course,but their expressions are still confused in some textbooks,standards and dictionaries.By studying the description and existing confusion,it is considered necessary to distinguish between apparent density and envelope density,since both of which should have a unique definition;Apparent density refers to the mass of materials per unit of apparent volume,which includes the volume of solid matter and the volume of closed pores in the material,excluding the volume of open pores.Envelope density refers to the mass of material per unit of exterior volume,which includes the volume of the solid material and the volume of all the pores in the materials(includingopen pores and closed pores).

关 键 词：土木工程材料 表观密度 体积密度 

分 类 号：G642.421[文化科学—高等教育学]