STRENGTH AND HYDRATION OF THE CEMENTITIOUS MATERIAL BASED ON THE OPC-AC-CS SYSTEM

OPC-AC-CS系セメント材料の強度発現性と水和反応特性

The Portland Cement (OPC) Calcium Aluminate Cement (AC)-anhydrite (CS) system is useful for various construction materials because it Can provide various physical properties by adjusting the mix proportions. For example, this system is used for cementitious material to provide the properties of early drying, rapid hardening, and small length change. However, this system is very sensitive to mix-proportion, temperature and the quality of raw materials, which is a significant problem. On the other hand, it’s important to use much by-product such as Blast furnace slag (BFS) for the environmental. So, the authors examined about the hydration and compressive strength of the cementitious material based on the OPC-AC-CS system as basic study for the foundation of the OPC-AC-CS-BFS system. The compressive strength of this cementitious material was especially depended on the OPC/AC ratio. From the hydration analysis of the OPC-AC-CS system, they found that their phase compositions that calculated from the reaction ratio of the main minerals were completely different. In the case of the OPC/AC ratio 3.00, ettringite and C-S-H gel were main hydrate. On the other hand, in the case of the OPC/AC ratio 0.33 and 1.00, ettringite and C-A-H gel were main hydrate. However, the compressive strength correlated with the gel pore ratio in spite of the OPC/AC ratio. Therefore, in the range of their study, the authors guessed the reason of the difference of the compressive strength was the difference of the gel pore ratio. However, on the other hand, the amount of C-A-H gel related to compressive strength, so they have to examine about the deference of the elastic behavior of the hydrate in future study.ポルトランドセメント（OPC）-アルミナセメント（AC）-無水石膏（CS）系セメント材料の圧縮強さに及ぼすOPC/AC比の影響を検討した結果、OPC/AC比3.00と比較して、0.33および1.00の方が圧縮強さは高い値を示した。水和反応解析の結果、OPC/AC比でOPCおよびACの配合量が大きく異なることに加え、反応率が異なるために相組成は大きく異なった。相組成から算出したゲル空隙比と圧縮強度の関係は、OPC/AC比にかかわらず対応しており、本研究の範囲ではOPC/AC比で水和生成物自体の強度には違いがなく、ゲル空隙比が異なることが、圧縮強さに違いが生じた原因であると推察された。

• Record URL:
  https://doi.org/10.14250/cement.68.126
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=STRENGTH+AND+HYDRATION+OF+THE+CEMENTITIOUS+MATERIAL+BASED+ON+THE+OPC-AC-CS+SYSTEM&author=H.+MORI&author=D.+ATARASHI&author=M.+MIYAUCHI&author=E.+SAKAI&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • MORI, Hirokatsu
  • ATARASHI, Daiki
  • MIYAUCHI, Masahiro
  • SAKAI, Etsuo
• Publication Date: 2014

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 126-132
• Serial:
  • Cement Science and Concrete Technology
  • Volume: 68
  • Issue Number: 1
  • Publisher: Japan Cement Association
  • ISSN: 0916-3182
  • EISSN: 2187-3313
  • Serial URL: https://www.jstage.jst.go.jp/browse/cement/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Aluminous cement; Calcium compounds; Cement; Compressive strength; Hydration; Mixtures; Portland cement; Strength of materials
• Subject Areas: Construction; Materials; Transportation (General); I32: Concrete; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 01564565
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: May 26 2015 4:12PM