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EFFECT OF SALT ADDITIVES ON CONCRETE DEGRADATION (PHASE II). EXECUTIVE SUMMARY.
| 题名： | EFFECT OF SALT ADDITIVES ON CONCRETE DEGRADATION (PHASE II). EXECUTIVE SUMMARY. |
| 作者： | Jang-J-W; Iwasaki-I; Weiblen-P |
| 关键词： | CONCRETES-; DEICING-SALT; CHEMICAL-REACTIONS; PRECIPITATES-; CHEMICAL-COMPOSITION; DETECTION-; CALCIUM-PHOSPHATES; MAGNESIUM-PHOSPHATES; GYPSUM-; DEGRADATION-; DETERIORATED-CONCRETE |
| 摘要： | This research builds on a previous investigation, which found that corrosion-inhibitor-added deicing salts caused degradation of concrete by both anions and cations. The latest research phase looked at methods to detect the chemical reactions between concrete and corrosion-inhibitor-added deicing salts, and to determine the chemical compositions of the precipitates formed by chemical reactions between concrete and the corrosion-inhibitor-added deicing salts. The research led to the following conclusions: a simple method was developed for the detection of chemical reactions between deicing chemicals and concrete; the results provided clear evidence of the chemical reactions between concrete and the corrosion-inhibitor-added deicing salts; the different amounts of precipitates (chemical reaction products) found in the test cells were dependent on the type and concentration of corrosion-inhibitor-added deicing salts; precipitates formed by chemical reactions between deicing chemicals and concrete were identified by using chemical analysis, scanning electron microscopy, and X-ray diffraction analysis; and precipitates were calcium and/or magnesium phosphates as a major component, and gypsum as a minor component. |
| 总页数： | 1995/02. pp20 (2 Phot., 2 Fig., 4 Tab., 14 Ref.) |
| 报告类型： | 科技报告 |
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