| 種別 | paper |
| 主題 | Electrochemical Methods for Rehabilitation of Corroding Steelin Concrete in USA |
| 副題 | |
| 筆頭著者 | Jack BENNETT（ELTECH Research Co.） |
| 連名者1 | Keisuke ARSAE（ELTECH Asia Service Co.） |
| 連名者2 | Toshikazu MINEMATSU（SUMITOMO CEMENT Co.） |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 16 |
| 号 | 1 |
| 先頭ページ | 829 |
| 末尾ページ | 834 |
| 年度 | 1994 |
| 要旨 | 1. INTRODUCTION Corrosion is recognized today as one of the major contributors to the deterioration of steel reinforced concrete structures. The presence of chlorides, introduced by deicing salt, set accelerators or seawater, is a major contributor to corrosion of steel in concrete. The only proven means of stopping this corrosion without removal of the chloride contaminated concrete are electrochemical chloride removal and cathodic protection. Strategic Highway Research Program (SHRP) Contracts C-102A and C-102D were designed to study the techniques of chloride removal and cathodic protection, respectively. This paper summarizes the work done under these contracts. 4. CONCLUSIONS The chloride removal process was found to be an effective technique for controlling corrosion in chloride contaminated concrete. The process should not be used on structures containing prestressed steel. It should be used with caution where alkali reactive aggregates are present because of the large amount of alkalinity generated. The time for which the treatment is effective is not yet established. Cathodic protection was found to be a highly effective technique for arresting corrosion in reinforced concrete structures. A polarization of 150 mV was found to be generally acceptable for controlling corrosion to an acceptable level. Another simple criterion based on the level of chloride contamination is suggested. |
| PDFファイル名 | 016-01-1137.pdf |