2026-03-08T11:17:36Z https://kanazawa-u.repo.nii.ac.jp/oai

oai:kanazawa-u.repo.nii.ac.jp:00009947 2024-06-20T06:29:20Z 934:935:936

防錆剤混入ポリマーセメントモルタルによる塩害劣化コンクリート中の鉄筋の防食効果(<特集>建設材料) Effectiveness of Polymer-Modified Cement Mortar with Corrosion Inhibitor in Preventing Chloride-Induced Steel Corrosion in Concrete(<Special Issue>Structural Materials) 青山, 實伸 鳥居, 和之 日本材料学会；本文データは日本材料学会の許諾に基づきCiNiiから複製したものである In Japan, the polymer-modified cement mortar (PCM) with the corrosion inhibitor has often been used as repair materials for deteriorated reinforced concrete structures due to the chloride-induced steel corrosion. In this study, the reinforced concrete specimens with two levels of chloride content were prepared and exposed to wet and dry cycles in the chamber for a long period to clarify the macro-cell corrosion of steel bar in the concrete. The effectiveness of the type and dosage of corrosion inhibitor, LiNO_2 or Ca(NO_2)_2, in PCM and the degree of chipping around steel bars in repair work in preventing the steel corrosion in concrete were comparatively investigated by means of electro-chemical measurements such as linear polarization resistance and AC impedance methods. From the experimental results, it was found that PCM with both corrosion inhibitors of LiNO_2 and Ca(NO_2)_2 had almost the same effect in preventing the steel corrosion when their NO_2^- molecular ratio to Cl^- was constant, and that the chipping and patching work beyond steel bars was more effective in restoring the passive state of steel bars. Furthermore, both the linear polarization resistance and the AC impedance methods were very useful as a nondestructive inspection method for estimating the corrosion behavior of steel bars in repaired and unrepaired concrete with PCM. 金沢大学理工研究域環境デザイン学系 日本材料学会 2003-09-15 2017-10-03 jpn journal article VoR http://hdl.handle.net/2297/12308 https://kanazawa-u.repo.nii.ac.jp/records/9947 http://ci.nii.ac.jp/naid/110002302224/ AN00096175 0514-5163 材料=Journal of the Society of Materials Science, Japan 52 9 1075 1081 https://kanazawa-u.repo.nii.ac.jp/record/9947/files/TE-PR-TORII-K-1075.pdf application/pdf 771.9 kB 2017-10-03