EFFECTS OF DIFFERENT CLINKER MINERAL RATIOS AND CURING TEMPERATURES ON C-S-H FO RMATION MECHANISM OF PORTLAND CEMENT

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  • WATANABE Taiki
    NIIGATA UNIVERSITY, Graduate School of Science and Technology（8050, Ikarashi Nino-cho, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan）
  • SAITO Tsuyoshi
    NIIGATA UNIVERSITY, Faculty of Engineering（8050, Ikarashi Nino-cho, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan）
  • SUZUKI Kazuho
    NIIGATA UNIVERSITY, Graduate School of Science and Technology（8050, Ikarashi Nino-cho, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan）
  • SAEKI Tatsuhiko
    NIIGATA UNIVERSITY, Faculty of Engineering（8050, Ikarashi Nino-cho, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan）

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Other Title
  • クリンカー構成鉱物比および養生温度の相違がポルトランドセメントのC-S-H生成機構に及ぼす影響

Abstract

<p>In this study, the effects of different clinker constituent mineral ratios and curing temperatures on the C-S-H structure were investigated, mainly using FT-IR. In the FT-IR analysis, the second derivative curve of the spectrum was used to evaluate the formation and growth behavior of C-S-H. The intensity ratio of the C2S-derived Si-O stretching peak to the C-S-H-derived Si-O stretching peak, and the Si-O-Si variant peak width were used as an indicator of the amount of C-S-H formation and as a new indicator of the regularity of the Si chains in C-S-H, respectively. The results indicate that in samples with high C3S content, the regularity of the C-S-H Si chain is established in the initial stage of hydration, and that the C-S-H may grow with the regularity retained thereafter. On the other hand, in samples with high C2S content, the regularity of C-S-H Si chains is not established initially, indicating that the regularity may increase with C-S-H growth.</p>

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