亜硝酸リチウム含有ポリマーセメントモルタルによる塩害抑制効果の評価に関する研究

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タイトル別名
  • A STUDY ON EVALUATION REPRESSION EFFECT OF POLYMER CEMENT MORTAR CONTAINING LITHIUM NITRITE FOR SALT ATTACK ON CONCRETE
  • アショウサン リチウム ガンユウ ポリマーセメントモルタル ニ ヨル エンガイ ヨクセイ コウカ ノ ヒョウカ ニ カンスル ケンキュウ

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Mortar spreading methods, containing high density lithium nitrite, were applied on actual size concrete substrates and had been exposed along the coast of Okinawa for 19 years. During the above years, repression effects of flying salinity infiltration had been evaluated. It was found that nitrite ions permeated concrete structures promptly from mortar containing lithium nitrite. Understanding permeability of nitrite ions, lithium ions and chloride ions to concrete, authors provided diffusion equations to evaluate correlation between actual measurement and simulation derived values. It was inclined to show that diffusion coefficient of nitrite ions was greater than that of chloride and lithium, and that coefficient of lithium ions far much smaller than chloride: nitrite ions>chloride ones>>lithium ones. As a result it was shown that little flux rate and small diffusion coefficient of nitrite ions produced continuous supplying into concrete.

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