基于SEM分析的粒化高炉矿渣混凝土冻融性能研究

发布时间：2018-01-19 18:26

本文关键词： 粒化高炉矿渣混凝土冻融扫描电镜　出处：《施工技术》2017年S1期 　论文类型：期刊论文

【摘要】：为了研究粒化高炉矿渣混凝土的冻融性能,在快冻法的基础上,本文通过力学性能试验及扫描电镜分析研究了不同水胶比、不同代砂率的粒化高炉矿渣混凝土的力学性能退化机理,此外,分析了粒化高炉矿渣混凝土力学性能退化和微观结构的内在联系。试验结果表明:经过冻融循环后,粒化高炉矿渣混凝土的抗压强度损失率小于普通混凝土,且粒化高炉矿渣混凝土冻融后产生较多的相互交错的纤维状及花簇状晶体,这些晶体的产生可提高混凝土的抗压强度,所有结果表明粒化高炉矿渣可以提高混凝土的抗冻性,且代砂率越大抗冻性越好。
[Abstract]:In order to study the freeze-thaw properties of granulated blast furnace slag concrete, different water-binder ratios were studied by mechanical property test and scanning electron microscope analysis on the basis of quick freezing method. The degradation mechanism of mechanical properties of granulated blast furnace slag concrete with different sand replacement ratio is also discussed. The relationship between mechanical properties degradation and microstructure of granulated blast furnace slag concrete is analyzed. The experimental results show that the loss rate of compressive strength of granulated blast furnace slag concrete is lower than that of ordinary concrete after freeze-thaw cycle. And granulated blast furnace slag concrete after freezing and thawing produced more interlaced fibrous and flower-shaped crystals, which can improve the compressive strength of concrete. All the results show that granulated blast furnace slag can improve the frost resistance of concrete, and the bigger the sand replacement rate is, the better the frost resistance is.
【作者单位】：内蒙古电力科学研究院;包头市供电局;
【分类号】：TU528
【正文快照】： 0引言混凝土是一种脆性的复合材料,具有非均质性、多项性、多层次的特点。一般混凝土材料的结构和内部组成反映了材料的宏观性能,也就是说,混凝土内部的微观结构可以反映其材料的复杂力学特征及其宏观耐久性,因此,探讨混凝土微观结构具有十分重要的意义。国内外学者已经有大量

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