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http://dx.doi.org/10.12814/jkgss.2019.18.1.067

Development of Reinforcement Grout Materials Using Blast Furnace Slag Powder and Aramid Fiber  

Seo, Hyeok (Department of Civil Engineering, Chosun Univ.)
Park, Kyung-Ho (SOIL-ROCK E&C Co., Ltd)
Kim, Chan-Jung (DONG-A ENG Co., Ltd)
Kim, Ho-Chul (Department of Civil Engineering, Chosun Univ.)
Kim, Daehyeon (Department of Civil Engineering, Chosun Univ.)
Publication Information
Journal of the Korean Geosynthetics Society / v.18, no.1, 2019 , pp. 67-77 More about this Journal
Abstract
The grouting method is utilized to reinforce and waterproof poor grounds, enhance the bearing capacity of structures damaged resulting from settlement due to elevation and vibration or differential settlement, and for cutoff. The purpose of this research is to enhance the compressive strength of grout materials by using aramid fiber and develop a high-strength ground improvement method by using blast furnace slag powder. In this regard, this study has conducted a uniaxial compression test after checking the high charge (higher than 50%) of the ratio of blast furnace slag powder and cement at 100:0, 70:30 and 40:60%, adding the aramid mixture based on 0, 0.5 and 1.0% of the cement and furnace slag powder weight and creating sand gels based on surface oiling rate of 0.7 and 1.2%. For the environmental review evaluation, a heavy metal exudation test and a pH test measurement have been conducted. The experiment results showed that 1% increase of aramid fiber led to 1.3 times greater uniaxial compression intensity. As for the hexavalent chrome, a 30% increase in blast furnace slag powder led to approximately 50% decrease in heavy metal exudation. However, the pH test revealed that a 30% increase in blast furnace slag powder resulted in approximately 0.5 increase in pH. Further research on the pH part is needed in the future.
Keywords
Blast Furance Slag; Aramid Fiber; Uniaxial Compressive Strength; Scanning Electron Microscope; Energy Dispersive X-Ray;
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  • Reference
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