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http://dx.doi.org/10.14190/JRCR.2019.7.1.66

Characteristics of Mine Liner According to the Replacement Ratio of Nano-Silica and Silica-Fume  

Kang, Suk-Pyo (Department of Architecture, Woosuk University)
Lee, Hee-Ra (Department of Architecture, Woosuk University)
Kang, Hye-Ju (Department of Architecture, Woosuk University)
Nam, Seong-Young (Hanil Cement Co., Ltd.)
Kim, Chun-Sik (Hanil Cement Co., Ltd.)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.7, no.1, 2019 , pp. 66-73 More about this Journal
Abstract
Approximately 80% of the mines are vacated or abandoned mines and are mostly left without suitable environmental treatment facilities. In the area around the abandoned mine site, problems such as drainage of acidic city drainage and leakage of leachate occur, and ground subsidence caused by this can cause a safety accident due to sink hole occurrence. In this study, flow, compressive strength, water uptake, pore and hydration characteristics were investigated to investigate the basic properties of liner and cover material based on the replacement ratio of nano silica and silica fume in the existing blast - furnace slag fine powder. As a result, as the substitution ratio of nano silica and silica fume increased, the flow and compressive strength of nano silica specimens increased and the absorption rate decreased. In the case of pore characteristics, the amount of pores decreased as the substitution ratio of nano silica and silica fume increased. Especially, the capillary porosity of 10-1,000 nm diameter decreased. Ray diffraction analysis and SEM measurement showed that the peak positions of the hydration products were almost the same when compared with the 5% alternative test samples of Plain and silica fume.
Keywords
Mine; Liner and cover material; Nano silica; Silica fume;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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