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suetung8
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2楼2013-01-28 09:40:33
suetung8
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老光棍一个
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3楼2013-02-26 19:49:45
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suetung8: 金币+10, 基金HEPI+1, ★★★★★最佳答案, 多谢！ 2013-03-13 09:01:12
suetung8: 金币+10, 基金HEPI+1, ★★★★★最佳答案, 多谢！ 2013-03-13 09:01:12
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中文摘要： 以江苏废黄河漫滩区冲积相粉土和长江三角洲冲积相粉土为研究对象，对其分布区域及沉积环境进行分析，发现区域性粉土的特性与其沉积环境有着内在本质联系。从结构单元、联接方式、孔隙特征三方面描述了固化粉土的微观结构特征，并对固化粉土颗粒平均直径、颗粒圆形度、颗粒粒度分维等九个微结构参数进行了测量，通过压汞试验研究固化粉土的孔隙特征。研究首次完整的根据粉土特性对粉土固化组分应起作用及架构进行了分析，详细阐述了粉土固化材料的组分特性；将粉土固化过程分为两个体系：自紧密体系和综合水化体系；从宏观和微观特性出发对粉土固化机理进行了研究。在固化粉土抗压强度及路用性能试验研究的基础上，对固化粉土的水稳性、抗剪强度特性、压缩性和应力应变特性等进行系统研究，得到固化粉土的强度特性和变形特性。通过灰色关联分析方法和多元回归分析方法优选出五个最具有影响的微结构参数，并建立了固化土的力学强度特性与主要微结构参数之间的相关关系式。上述研究对于粉土的固化机理、固化土的微观结构定量分析和土的固化理论的进一步发展具有重要的科学意义，对粉土固化剂的研制开发以及固化粉土的工程应用具有重要的实际应用价值。 中文主题词： 粉土；微观结构；固化；机理；力学特性 英文摘要: This paper presents an investigation of the influence of distribution and sedimentary environment on the characteristics of regional alluvial silt. The silt specimens were prepared using alluvial silt of the Yellow River Flood Plain and Yangtze River Delta in Jiangsu. A series of laboratory tests including Mercury intrusion porosimetry (MIP), Scanning electron microscopic analysis (SEM), mechanical tests were used to discuss the microstructure characteristics of stabilized silt and establish the relationship between mechanical index and micro-structural index. To understand the microstructure characteristics of stabilized silt, the structure unit, connecting methods, pore characteristic were thoroughly studied. The stabilized process could be divided into two systems: the self-compact and integrated hydration systems by analyzing interaction and structure characters of the stabilized silt specimens, which were influenced by alluvial silt original components. Based on the water stability, shear-resistance, compressibility and stress-strain characteristics of stabilized silt, the correlation equation was established to reflect the relationship between the compressive strength and the five microstructure parameters. The five special microstructure parameters were optimized by the gray relational analysis method and multiple regression analysis method. The research about the stabilized mechanism and the microstructure quantitative analysis of stabilized silt are useful and practical for the development of silt binders and application of stabilized silt, which further consummating the stabilized theory. |
4楼2013-03-12 21:21:05
