Variations in Compressive Strength of Geopolymer due to the CaO Added Fly Ash

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  • CaOを添加したフライアッシュによるジオポリマーの圧縮強さの変化
  • CaO オ テンカ シタ フライアッシュ ニ ヨル ジオ ポリマー ノ アッシュク ツヨサ ノ ヘンカ

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Abstract

Recently, geopolymer has been a noteworthy material which can be used as a replacement for portland cement. The mechanical characteristics and consistency of the geopolymer are strongly affected by its chemical components of fly ash. The variations in compressive strength of geopolymer due to the CaO added fly ash were investigated in this paper. The compressive strengths of geopolymer were increased with an increase in the curing period, and the characteristics changed from the one of plastic soil material to brittle material such as concrete, regardless of CaO content. Also, the results of compressive strength and modulus of deformation showed their maximum value in the case of 8-10% CaO content. From this result, the maximum characteristics of the strengths were assumed to be exerted in case which the water draining process of geopolymer was balanced with the water absorbing process of additional CaO.

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