Freeze-thaw Resistance of Concrete using Ground Granulated Blast-furnace Slag and Blast-furnace Slag Sand in Salt Water
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- Ayano Toshiki
- Faculty of Environmental, Life, Natural Science and Technology, Okayama University, 1-1 Tsushima-naka 3-chome, Kita-ku, Okayama City, Okayama Prefecture 700-8530, Japan.
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- Fujii Takashi
- Faculty of Environmental, Life, Natural Science and Technology, Okayama University, 1-1 Tsushima-naka 3-chome, Kita-ku, Okayama City, Okayama Prefecture 700-8530, Japan.
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- Okazaki Kanako
- Division of Social Engineering and Environmental Management, Graduate School of Environmental and Life Science, Okayama University, 1-1 Tsushima-naka 3-chome, Kita-ku, Okayama City, Okayama Prefecture 700-8530, Japan.
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説明
<p>The freeze-thaw resistance of concrete is significantly lower in salt water than in fresh water. Concrete deteriorates through repeated freezing and thawing, but in salt water, freezing alone leads to destruction. This paper investigated the effect of calcium hydroxide in concrete on the failure of concrete under such low temperatures. Calcium hydroxide precipitates at the transition zone between aggregate and cement paste due to the hydration of cement. The lower the temperature and the higher the concentration of salt water, the more calcium hydroxide dissolves. From concrete, more calcium hydroxide is eluted in salt water than in fresh water. This accelerates the deterioration of mortar and concrete due to freeze-thaw action. Mortar and concrete using ground granulated blast-furnace slag produces less calcium hydroxide. In mortar and concrete using blast-furnace slag sand, calcium hydroxide precipitated around the aggregate reacts with cement paste and blast-furnace slag sand to modify the transition zone. From these results, it was clarified that concrete using blast-furnace slag exhibits high freeze-thaw resistance even in salt water.</p><p>This paper is the English translation of the authors’ previous work [Ayano, T., Fujii, T. and Okazaki, K., (2023). “Freeze-thaw resistance of concrete using ground granulated blast-furnace and blast-furnace slag sand in salt water.” Japanese Journal of JSCE, 79(12), 23-00042. (in Japanese)].</p>
収録刊行物
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- Journal of Advanced Concrete Technology
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Journal of Advanced Concrete Technology 22 (5), 253-266, 2024-05-09
公益社団法人 日本コンクリート工学会
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詳細情報 詳細情報について
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- CRID
- 1390581555877959168
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- NII書誌ID
- AA11862067
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- ISSN
- 13473913
- 13468014
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- Crossref
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- 抄録ライセンスフラグ
- 使用不可