摘要
文章论述了混凝土强度、渗透性和抗冻性等基本概念需要进一步细化或强调的必要性。阐明了混凝土的强度概念需注重不同龄期的强度;混凝土的渗透性概念需细化为毛细孔压力渗透性、水压力渗透性和浓度差渗透性;混凝土的抗冻性概念应细化为水中抗冻性、大气抗冻性和临水大气抗冻性。同时,指出各性能之间的相互关系会随着混凝土孔结构的变化而发生变化;根据混凝土的主要孔径尺寸及其性质和混凝土的相应密实程度,可将混凝土的孔结构分类进一步细化为:超密实、高密实、中密实、非密实和引气型五类,其中,超密实、中密实和引气型三类是混凝土孔结构的演化趋势。
This paper discusses the need for some basic concepts such as concrete strength, permeability and frost- resistance on which should be further refined or stressed. It is proposed that the strength of the different age of concrete Should be thought over, the permeability should be divided into detailed capillary pressure permeability, hydraulic pres- sure permeability and concentration difference permeability, and the frost-resistance should be divided into detailed frost-resistance under water, frost-resistance in atmosphere and frost-resistance near the water in the atmosphere, also, the correlations among the properties vary with the different pore structure of concrete. According to the main aperture size and properties and the corresponding degree of compaction of concrete, its pore structure classification may be fur- ther divided into super close-grained, high close-grained, middle close-grained, imperfect close-grained and air-entraining type. Among them the super close-grained, middle close-grained and air-entraining type are selected trends of evolution.
出处
《建材世界》
2013年第1期27-31,共5页
The World of Building Materials
关键词
混凝土
概念的细化
孔结构分类
演化趋势
concrete
refine on basic concepts
classification of hole structure
trends of evolution
