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http://dx.doi.org/10.14190/JRCR.2015.3.2.146

Quality Improvement of Recycled Fine Aggregate by Neutralization Reaction in Water  

Kim, Ha-Suk (Korea institute of construction technology)
Kim, Jin-Man (Department of Architectural Engineering, Kongju University)
Sun, Joung-Soo (Department of Architectural Engineering, Kongju University)
Bae, Kee-Sun (Department of Architectural Engineering, Hanyang University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.3, no.2, 2015 , pp. 146-151 More about this Journal
Abstract
Recycled aggregate by the recycling construction waste has a lot of advantage such as the developing the alternative resource and protecting of environment. However, recycled aggregate is used as the low quality grade, because it is difficult to remove old mortar from aggregate. To use the recycled aggregate as high quality grade, it is important to develop the technology to produce the high quality recycled aggregate. To manufacture the high quality recycled aggregate, old mortar attached on the aggregates should be removed efficiently. Therefore, in this study, we suggested the optimum condition to remove old mortar effectively using sulfuric acid and low speed wet rotary mill for high quality recycled fine aggregate. The results shows that the recycled aggregate satisfy on the standards of KS F 2573 in density, absorption and solid volume, when adequate condition of sulfuric mole ratio and aggregate ratio are make.
Keywords
Waste concrete; Recycled aggregate; Recycled concrete; Wet rotary mill; Sulfuric water;
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  • Reference
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