摘要：采用扫描电镜和能量教射能谱分析仅分析了泥凝土中砂岩、大理岩,正长岩和玄武岩4种骨
料与水泥装体界面结构特征，并对这4种骨料混凝土的极限拉伸性能进行了研究.结果表明：不同
骨料恤和面平吸水率不同,影响了骨料一水泥浆体界面过渡区水化产物的化学组成而影响了 界
面结构特征,砂岩、大理岩骨料与水泥装体界面过渡区存在氨氧化钙的富集；正长岩、玄武岩骨料
与水泥装体界面过渡区则较少见到氢氧化钙的富集.4种骨料与水泥装体界面过渡区宽度大小顺
序 为 ：大滞号 - -贰不同宜凝土的轴。播，力，变行为科一
体界面结构特征的影响.
关键调；水工混凝土；骨料；吸水；界面；结构特征；极限拉仲性能
中图分类号：TU528.0
文献标志码：A
doi:10.3969/j.issn,1007-9629.2011.06.022
Interfacial Microstructure Characteristics and Ultimate Tensile Properties of
Concretes with Different Kinds of Aggregates
OUYANG You-ling1-2, CHEN Xun-jiel… , CAI Yue-bol.
1. Materials and Structural Engineering Department, Nanjing Hydraulic Research Institute，Nanjing 210029, China；
2.State Key Laboratory of Hydrology-Water Resources and Hydraulie Engineering；
Nanjing Hydraulic Research Institute, Nanjing 210029, China)
Abstract：Interfacial microstructure characteristics of four different aggregate-cement paste were investiga
ted by scanning electron microscope(SEM) and energy dispersive spectrometer(EDS). The four aggregate
were sourced from sandstone, marble, syenite and basalt, respectively. The ultimate tensile properties of
concrete with those four different aggregates were discussed. Test results show that the water absorption
at saturated surface-dry basis varies among the four aggregates and affects the chemical composition of hy-
dration products in interfacial transition zonc of aggregate-cement paste, and then affects the interfacial mi-
crostructure characteristics. Calcium hydroxide crystal is identified more clearly to be concentrated along
the aggregate-cement paste interfacial transition zone of sandstone and marble than those of syenite and ba-
salt. The width of interfacial transition zone varies among four aggregates, i.e. in descending order: mar-
ble, sandstone, syenite and basalt. It is also implicated that the interfacial microstructure characteristics
play a role in affecting the axial tensile stress-strain behaviors of concretes.
Key words:hydraulic concrete；aggregate；water absorption；interface；microstructure characteristic；ulti
mate tensile property

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