ALKALI-SILICA REACTION AND CORROSION OF STEEL REINFORCEMENT IN MORTARS CONTAINING A REACTIVE AGGREGATE AND CHLORIDE

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  • 塩化物含有モルタルにおけるアルカリ・シリカ反応と鉄筋の腐食
  • エンカブツ ガンユウ モルタル ニ オケル アルカリ シリカ ハンノウ ト テ

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Abstract

The relationships between the pore solution composition and the corrosion intensity evaluated by electrochemical measurements for the steel electrode embedded in mortars containing a reactive aggregate and chloride are experimentally discussed in order to reveal influences of the alkali-silica reaction on the corrosion of steel reinforcement in mortars. The alkali-silica reaction promotes the chloride-induced corrosion of steel bars embedded in mortars containing a reactive aggregate and a chloride. The extent of the promotion varies with the type of chloride. The relationships between the corrosion intensity and Cl-/OH- ratio in the pore solution in CaCl2-bearing mortars are very different from those in NaCl-bearing mortars.

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