ビーライトから生成するC-S-Hの比表面積に関する検討  [in Japanese] STUDY ON THE SPECIFIC SURFACE AREA OF C-S-H GENERATED FROM BELITE  [in Japanese]

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Abstract

セメント系硬化体中における主要な水和物であるC-S-Hは、その組成の変化がコンクリート中のイオンの移動や収縮といった物理化学的性質に大きく影響する。本研究では、C-S-Hの物理的性質である比表面積の変化について把握するため、ビーライトから生成されるC-S-Hの比表面積を測定し、エーライトから生成されるC-S-Hの比表面積と比較検討した。結果として、エーライトおよびビーライトからそれぞれ生成されるC-S-Hの比表面積はほぼ変わらないことが明らかとなり、両者がR.H.11%において保有するゲル水量が一致したことからも、結果の妥当性が示された。以上より、本研究の範囲内では、C-S-Hの比表面積はC/S比には依存するものの、生成起源の違いによる影響を受けないものと考えられる。

C-S-H is a dominant hydration product of hardened cement materials. Thus, changes of composition of C-S-H have a huge effect on the physical-chemical properties of that. These properties are diffusivity of ion in concrete and shrinkage, and all that. Therefore, it is important to figure out the specific surface area of C-S-H accurately.<br/>The purpose of this study is to figure out the specific surface area which is physical properties of C-S-H. Specific surface area of C-S-H generated from alite was checked up already in our laboratory. So we measured the specific surface area of C-S-H generated from belite, and compared with the specific surface area of C-S-H generated from alite. As the result, it was found that composition of each C-S-H generated from alite and belite were about the same. Furthermore, both specific surface area were in the same range.<br/>Next, we measured amount of gel water at relative humidity 11% to examine the experimental results. The volume of gel pore can be calculated from the amount of gel water. As the results, the amount of gel water of C-S-H generated from alite and that of C-S-H generated from belite were the same. Therefore, validity of experiment results of the specific surface area was recognized. Finally, the specific surface area of C-S-H is not affected by clinker minerals.

Journal

  • Cement Science and Concrete Technology

    Cement Science and Concrete Technology 66(1), 175-181, 2012

    Japan Cement Association

Codes

  • NII Article ID (NAID)
    130004574689
  • Text Lang
    JPN
  • ISSN
    0916-3182
  • Data Source
    J-STAGE 
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