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Title |
Properties and Environmental Effects Estimation of Grout Using Set Accelerating Agent Made From Calcium Aluminate and Viscosity Agent
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Keywords |
그라우트 ; 칼슘알루미네이트 ; MC계 ; 킬레이트고분자 ; 환경영향 Grout ; Calcium aluminate ; Methyl cellulous ; Chelate polymer ; Environmental effect |
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Abstract |
In this study, environmental problems(i.e., pH elevation and Cr6+ detection) occurred by using the cement grout made from CA(calcium aluminate) were evaluated using viscosity agents(MC, chelate polymer). Ordinary portland cement and blaste-furnace slag cement were used by main materials and ACC(blended mixture of calcium aluminate) were used by accelerator for hardening of grout. In addition, viscosity agents were used for preventing pH elevation and heavy metal detection from grouting materials. From the results, it was noted that when chelate polymer was used, pH elevation and Cr6+ detection were minimized. However, other cases showed higher pH elevation and Cr6+ detection. At test 1 day, Cr6+ detection with age presented over 97% of total value and, after that, additional increase was not distinct. As a result of this study, it was acknowledged that, to control pH elevation and heavy-metal (like Cr6+) detection, the usage of BSC and chelate polymer is a very useful fact.
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