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http://dx.doi.org/10.14190/JRCR.2021.9.2.223

A Study on the Detoxification of Chrysotile and the use of High-density Extruded Cement Panel Reinforcement Fibers  

Jang, Kyong-Pil (Department of Living and Built Environment Research, KICT)
Kim, Tae-Hyoung (Department of Living and Built Environment Research, KICT)
Song, Tae-Hyeob (Department of Living and Built Environment Research, KICT)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.9, no.2, 2021 , pp. 223-228 More about this Journal
Abstract
The final disposal method for asbestos building materials is to be landfilled at a designated waste landfill in accordance with the Waste Management Act. However, it is difficult to secure a domestic designated waste landfill site to landfill the entire amount of asbestos waste, which is expected to emit more than 400,000 ton/year by 2044. In this study, a detoxification treatment was performed on a ceiling tex with a density of 1.0 to 1.2g/cm3 containing 3 to 7% of chrysotile, and it was used as a reinforcing fiber for extruded panels. It was confirmed that asbestos components were detoxified through the reaction process using 30% oxalic acid and carbon dioxide, and it was recognized that these detoxifying properties were maintained even after extrusion molding. However, it was found that milling to a fiber size of less than 1mm for complete detoxification of asbestos resulted in a decrease in reinforcing performance. Therefore, in the case of using detoxified asbestos fibers in the extrusion molding process, it is considered desirable to add fibers with a length of 5mm or more to improve the reinforcing performance.
Keywords
Asbestos; Chrisotile; Slate; Detoxification treatment; Recycle; Construction waste;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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