ELASTIC BEHAVIOR OF HARDENED CEMENT PASTE BY USING BACKSCATTER ELECTRON IMAGE AND ELEMENT IMAGE USING ENERGY-DISPERSIVE X-RAY ANALYSIS

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  • 反射電子像及び元素分布像を用いた硬化セメントペーストの力学的性質の推定
  • ハンシャ デンシゾウ オヨビ ゲンソ ブンプゾウ オ モチイタ コウカ セメントペースト ノ リキガクテキ セイシツ ノ スイテイ

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Abstract

The elastic properties of concrete depend on the characteristic of cement matrix and coarse aggregates. The elastic characteristic of cement matrix depends on the cement paste when the properties of the fine aggregate are constant. That is, clarifying the characteristic of the cement matrix clarifies the elastic properties of concrete. Therefore, the technique for predicting the elastic modulus of the cement paste from the viewpoint of microstructure was examined in this research. It classified into four phases (pore, C-S-H, calcium hydroxide, and unhydrated cement) in the backscattered electron image, and examined it by the finite element method in two dimension. The result indicates the elastic modulus of hardened cement paste strongly depends on the porosity of large pores. Moreover, it is cleared that the elastic modulus hardly changes by differences of the number of pixels and the magnification of images in this study.

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