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Study on the secondary interface in microstructure of the superfine sand concrete

机译：超细砂混凝土微观结构中的二次界面研究

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The superfine sand concrete application in our country has a history of more than half a century. Although we have a certain understanding about the superfine sand concrete, there are few studies of superfine sand concrete interface. This experiment made up different water-cement ratio superfine sand concrete, and used scanning electron microscope to observe the secondary interface structure, the product of interface C-S-H gel had been carried on by the energy spectrum analysis. Results show that the secondary interface microstructure of the low water-cement ratio concrete is denser than high water cement ratio, and also have certain effects on macroscopic compressive strength; C-S-H gel calcium silicon ratio in the secondary interface is between 1.5 and 2.1.
机译：我国的超细砂混凝土应用有超过半个世纪的历史。虽然我们对超细砂混凝土有一定的了解，但研究了超细砂混凝土界面的研究。该实验组成了不同的水水泥比超细砂混凝土，并使用扫描电子显微镜观察二次接口结构，通过能谱分析进行了界面C-S-H凝胶的产物。结果表明，低水泥比混凝土的二次界面微观结构比水泥水泥比更密集，对宏观抗压强度也有一定的影响;二次界面中的C-S-H凝胶钙硅比在1.5和2.1之间。

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